Related Topics:
Difference Between Photovoltaic Glass-
The difference between photovoltaic glass and photovoltaic power generation
Over November and December 2020, quotes for PV glass rose to reach the price of $6.64/㎡ according to market research company PV InfoLink, with some small-scale suppliers even quoting prices of $7.72/㎡. Over the past ten years, the number of PV patent filings, among which are. The impact of Covid-19 has resulted in some solar glass projects not meeting capacity expectations and China's downstream enterprises have become overwhelmed, especially by the spiralling glass price solar industry. For example, solar company Flat. With solar installations increasing around the world and the rising popularity of the green buildings concept, the market demand for solar glass is unlikely to fade away soon, especially if backed by government initiatives and incentives. For instance, last.
[PDF Version]
FAQs about The difference between photovoltaic glass and photovoltaic power generation
What is the difference between Photovoltaic Glass and traditional solar PV?
The main difference between photovoltaic glass technologies and traditional solar photovoltaics (PV) is that the newer panels are built into the structure rather than being added on top, which provides an incentive for users concerned about balancing aesthetics and functionality.
What is the difference between solar glass and solar photovoltaics?
The main difference between solar glass technologies and traditional solar photovoltaics (PV) is that solar glass panels are built into the structure rather than being added on top. This provides an incentive for users concerned about balancing aesthetics and functionality.
What is Photovoltaic Glass?
Photovoltaic (PV) glass is a glass that utilizes solar cells to convert solar energy into electricity. It is installed within roofs or facade areas of buildings to produce power for an entire building. In these glasses, solar cells are fixed between two glass panes, which have special filling of resin.
What is the classification of Photovoltaic Glass?
The classification of photovoltaic glass mainly includes ultra white photovoltaic embossed glass, ultra white processed Float glass, TCO glass and backplane glass. The main characteristics are analyzed as follows: (1) Ultra White Photovoltaic Embossed Glass
Is solar glass still a promising technology?
Despite its potential, solar glass has not yet reached critical mass. However, with new policies set to ease China's solar production constraints, we check in on the state of the solar glass market and the obstacles it is yet to overcome.
What is solar glass?
Solar glass is a type of building-integrated photovoltaic material designed to replace conventional building materials in parts such as roofs, skylights, facades, and windows to efficiently generate power.
-
Photovoltaic glass specifications and standards
This document specifies requirements of appearance, durability and safety, test methods and designation for laminated solar photovoltaic (PV) glass for use in buildings.
FAQs about Photovoltaic glass specifications and standards
Is this document applicable to building-integrated photovoltaics (BIPV) glass?
This publication was last reviewed and confirmed in 2023. Therefore this version remains current. This document specifies requirements of appearance, durability and safety, test methods and designation for laminated solar photovoltaic (PV) glass for use in buildings. This document is applicable to building-integrated photovoltaics (BIPV).
Which materials are used in photovoltaic panels?
The remaining 20 –25% encompassed fiberglass (including reinforcement, insulation, and mineral wool fibers) and specialty glass manufacturing . Flat glass transparency, low-iron glass improves photovoltaic (PV) panel efficiency. This seg- emphasis on energy efficiency and sustainability. Refs. [35, 36].
Does flat glass improve photovoltaic (PV) panel efficiency?
Flat glass transparency, low-iron glass improves photovoltaic (PV) panel efficiency. This seg- emphasis on energy efficiency and sustainability. Refs. [35, 36]. Based on in-depth analyses of market size, trends, and growth projections. Table 1. Flat glass market. augmented reality and advanced display technologies.
Does Polysolar manufacture BIPV glass?
Polysolar manufactures a wide range of different solar BIPV glass technologies designed to best meet the application and situational needs of our clients. All our glass products can be manufactured into insulated double-glazed units and are fully warranted and certified.
Can spectral converters be integrated into PV glass?
A standardized model is presented for evaluating the efficiency of spectral converters integrated into PV glass, systematically assessing spectral absorption and emission properties, current drop and current gain, material stability, and integration feasibility.
What sizes are available for solar panels?
Standard panel dimension 1200mm x 600mm x 7.1mm, but available in any bespoke shape and size up to 3m. Full range of colour laminates or coatings available on request. Efficiency from 12% or 118Wp/m². To buy or for help specifying please call 01223 911534 or email [email protected]
-
Photovoltaic panel double glass card slot installation
This INSTALLATION MANUAL applies to installing, maintaining, and using the double glass and bifacial dual-glass solar modules manufactured by Hounen Solar Cambodia Inc or Hounen Solar America Inc. and its cooperated or affiliated companies.
-
Can glass replace photovoltaic panels
Photovoltaic glass is probably the most cutting-edge new solar panel technology that promises to be a game-changer in expanding the scope of solar. These are transparent solar panels that can literally generate electricity from windows—in offices, homes, car's sunroof, or even. A transparent solar panel is essentially a counterintuitive idea because solar cells must absorb sunlight (photons) and convert them into power (electrons). When a solar glass is transparent, the sunlight will pass through the medium and defeat the purpose of. Solar panel blinds are a supplement to transparent solar glass/panels when using the window to generate electricity. Solar power panels are designed to harvest sunlight to produce. Just the way solar roof panels are currently produced using different technologies (Tesla's solar shingles and other technologies),. Researchers at Michigan State University and MIT as well as manufacturers such as Ubiquitous Energy, Physee, and Brite Solar are pioneers in promoting this new solar panel technology.
[PDF Version]
FAQs about Can glass replace photovoltaic panels
What is Photovoltaic Glass?
Photovoltaic glass is probably the most cutting-edge new solar panel technology that promises to be a game-changer in expanding the scope of solar. These are transparent solar panels that can literally generate electricity from windows—in offices, homes, car's sunroof, or even smartphones.
Is solar glass a good alternative to existing solar panels?
Renewable energy is key, with electricity generation being responsible for 42.5% of CO2 emissions worldwide. Solar glass is amongst those new technologies, developed as an alternative to existing solar panels which offer a relatively poor output relative to the space they require.
What are solar glass panels?
Solar glass panels, often referred to as solar windows or transparent solar panels, represent a groundbreaking advancement in renewable energy technology. Unlike traditional solar panels that are bulky and mounted on rooftops, solar glass panels are integrated directly into windows or building facades.
Are photovoltaic glass panels a good alternative to regular glass?
These solar glass panels filter radiation from both the UV (up to 99%) and infrared (up to 95%) spectrum . As a result, photovoltaic glass panes are a better alternative to regular glass. Furthermore, these glass panels might be added to a number of already existing structures, enhancing them from a visual and energy perspective.
Why do solar panels need glass?
Glass provides mechanical, chemical, and UV protection to solar panels, enabling these devices to withstand weathering for decades. The increasing demand for solar electricity and the need to reduce anthropogenic carbon emissions demands new materials and processes to make solar even more sustainable.
Can transparent solar panels be used in architectural glass windows?
Ubiquitous Energy, in partnership with a leading glass manufacturer NSG Group, is developing Ubiquitous's unique ClearView Power technology to integrate transparent solar panels into architectural glass windows. ClearView Power's transparent solar coating can be directly applied to building windows at the time of the normal glass making process.
-
Concentrating glass plus photovoltaic power generation
Researchers from Aalto University in Finland demonstrated a proof-of-concept of laser-processed glass to be used as a type of solar concentrator for building integrated PV (BIPV) applications.
FAQs about Concentrating glass plus photovoltaic power generation
Can concentrating photovoltaic/concentrating solar power be combined with thermal energy storage?
This paper proposed a switchable hybrid system that combines concentrating photovoltaic/concentrating solar power (CPV/CSP) technology with thermal energy storage (TES) to achieve flexible electricity and thermal generation by adjusting the incident solar flux of photovoltaic (PV).
What is a concentrated solar power system?
Concentrated solar power system is used to generate electricity and to store thermal energy by using concentrators. Mukrimim Sevket Guney proposed such type of system, as Fig. 16 shows working principle of a concentrated solar power plant with thermal energy storage system.
Can concentrated photovoltaics improve system efficiency?
Tien et al. proposed a novel design of concentrated photovoltaics system which improved system efficiency by capturing more diffused and uniformly distributing solar radiations. In conservative CPV systems, only one optical device was used to concentrate solar radiations on the small area of cell.
Which type of solar concentrator is used for CPV system?
Different photovoltaics concentrators. Parabolic-dish concentrator is one of the popular concentrators used for CPV system. Such type of solar concentrator has a two-axis tracking system due to which solar energy radiations are concentrated towards the small area of solar cell as demonstrated in Fig. 6.
What is a Concentrating Photovoltaic (CPV) system?
21]. The concentrating photovoltaic (CPV) systems are the technology that directly converts concentrated sunlight into power through photovoltaic cells, achieving high conversion eficiency [22, 23]. The diagram in Fig. 1 presents an over-view of a CPV system, using a reflective condenser as an illustrative example.
Does trough concentrator work with different materials of PV solar cells?
Li et al. investigated the performance of trough concentrator with different materials of PV solar cells. Investigators used a trough concentrator of 10 m 2 size and examined the electrical and thermal efficiencies of the solar cells like GaAs and super array.
-
Photovoltaic panel silicon wafer glass separation
A critical prerequisite for recovery is the separation of the laminate. This study presented a novel and rapid separation strategy by laser (1200 W power, 2000 Hz frequency, 5% duty cycle), achieving complete separation of the silicon cells from the Ethylene Vinyl Acetate (EVA).
-
Heterojunction cells require photovoltaic glass
Silicon heterojunction technology (HJT) is expected to gain a significant market share in the near future. For HJT to deliver a low levelized cost of electricity (LCOE), it needs to have a high initial efficiency.
FAQs about Heterojunction cells require photovoltaic glass
What is a silicon heterojunction solar cell?
Silicon heterojunction (HJT) solar cells have been recognized as one of the most prominent technologies to improve silicon solar cell power generation, and they currently hold the silicon world record efficiency of 26.81% .
Are glass-glass solar panels a good choice for HJT solar cells?
It is also essential to note that although glass-glass modules (less susceptible to moisture ingress) rather than glass-backsheet modules are commonly used for HJT solar cells as studied in this work, it is likely that similar failure modes would occur in these modules, but over longer timescales.
What is the difference between standard and HJT solar cells?
Standard (homojunction) solar cells are manufactured with c-Si for the n-type and p-type layers of the absorbing layer. HJT technology, instead, combines wafer-based PV technology (standard) with thin-film technology, providing heterojunction solar cells with their best features. Structure of HJT solar cell - Source: De Wolf, S. et al.
How are heterojunction solar cells made?
There are several steps involved in the manufacturing process of the heterojunction solar cell. These are the following: The wafer processing involves cutting the c-Si cells with a diamond-based saw. Performing this process with extreme delicacy will result in high-quality c-Si layers, which translates to higher efficiency.
What is a heterojunction solar panel?
Heterojunction solar panels are extremely versatile, opening the way for the solar industry to further increase applications for solar power. These are some of the most common applications for this technology. HJT high conversion efficiency makes it great for limited space applications.
Which material is used for HJT solar cells?
There are two varieties of c-Si, polycrystalline and monocrystalline silicon, but monocrystalline is the only one considered for HJT solar cells since it has a higher purity and therefore more efficient. Amorphous silicon is used in thin-film PV technology and is the second most important material for manufacturing heterojunction solar cells.
-
Photovoltaic panels are blocked by glass
Have you ever heard the myth that solar panels can't charge through glass? It's a common misconception that has been debunkedtime and time again by experts in the field. Solar panels can charge through glas.
FAQs about Photovoltaic panels are blocked by glass
How does tinted glass affect solar panels?
Tinted Glass: Tinted Glass reduces solar light and heat. It lowers cooling costs but also decreases the amount of sunlight that can pass through to solar panels. Textured Glass: Textured Glass scatters sunlight. This makes it harder for solar panels to absorb and convert solar light into electricity.
Can solar panels charge through glass?
One myth is that solar panels can't charge through glass, but it's not true. Solar panels can charge through glass, and many types of glass can optimize solar energy. At Solar Comparison, we provide the information you need to make informed decisions about solar energy for your home or business.
Do solar panels behind glass still work?
So, even though solar panels behind glass still work, they lose a lot of energy. This means fewer sunlight particles (photons) make it to the panel's surface, resulting in lower electricity production compared to panels in the open sun.
Are plexiglass solar panels efficient?
Furthermore, Plexiglass permits ample sunlight to pass through to the solar panel, making it an excellent choice for their construction. Now, let's put some focus on the efficiency of solar panels behind glass. Also See: Will a Cracked Solar Panel Still Work? What is the Efficiency of Solar Panels Behind a Glass?
How can solar panels work more efficiently behind glass?
The points below explain how solar panels can be optimized to work more efficiently behind glass: Position the panels near a south-facing window: This helps them get the most direct sunlight. Use a small, movable panel: These can be adjusted throughout the day to catch the most sunlight.
Can solar panels be placed behind glass?
The efficiency of solar panels can take a hit when they're placed behind glass, potentially reducing their effectiveness by up to 50%. This decline in efficiency is based on several factors, including the strength of the incoming sunlight, the size of the solar panels, the type of glass used, its thickness, and how clean it is.
-
The development prospects of ultra-thin photovoltaic glass
Scientists at the Korea Institute of Energy Research (KIER) have developed a CIGS solar cell with ultra-thin glass (UTG), an emerging substrate known for its exceptional flexibility and stability.
FAQs about The development prospects of ultra-thin photovoltaic glass
What are the development prospects of ultra-thin semi-transparent CdTe solar cells?
Outlooks the development prospect of ultra-thin semi-transparent CdTe solar cells in BIPV and tandem cell. Cadmium Telluride thin film solar cell is very suitable for building integrated photovoltaics due to its high efficiency and excellent stability.
Does first solar use VTD in industrialized production?
Currently, First Solar has successfully applied VTD in industrialized production . VTD is one of the best methods for preparing high-efficiency CdTe solar cells. Presently, First Solar has achieved the highest efficiency in CdTe solar cells through this method . It has also been applied to the preparation of ultra-thin CdTe solar cells.
Why is CdTe thin film solar cell suitable for building integrated photovoltaics?
Cadmium Telluride thin film solar cell is very suitable for building integrated photovoltaics due to its high efficiency and excellent stability. To further reduce the production costs, relieve the scarcity of Tellurium, and apply in building integrated photovoltaics, ultra-thin CdTe photovoltaic technology has been developed.
What can we learn from amorphous silicon thin film solar cells?
Of course, we can learn from the development experience of amorphous silicon thin film solar cells to increase the optical path inside the device by using a back reflective layer or texturing on the surface of glass substrate, thus minimizing the absorption loss.
Can cadmium-free solar cells be used on ultra-thin glass?
The new cell concept was introduced in the study “ High-efficiency cadmium-free Cu (In,Ga)Se 2 flexible thin-film solar cells on ultra-thin glass as an emerging substrate,” published in the Journal of Alloys and Compounds.
How did first solar achieve a record efficiency in 2023?
In 2023, First Solar achieved a record efficiency of 22.3 % by incorporating selenium components in the CdTe absorber layer to form a Se-containing absorber layer and substituting Cu doping with As doping . A few months later, the efficiency was improved to 23.1 % by First Solar .
-
Photovoltaic module glass performance
We found that when a structured glass surface is present at the solar module's front, an increase in electricity yield can be achieved, with the largest gains under angles of incidence above 60°.
FAQs about Photovoltaic module glass performance
Why is glass/glass photovoltaic (G/G) module construction so popular?
Glass/glass (G/G) photovoltaic (PV) module construction is quickly rising in popularity due to increased demand for bifacial PV modules, with additional applications for thin-film and building-integrated PV technologies.
What is a glass on glass PV module?
A glass on glass (glass-glass) PV module, on the other hand, is properly cushioned from all these outdoor elements by double layers of glass, so it maintains its optimal performance for a very long time. So, are you interested in making the most of every square foot of roof surface with solar panels for an extended period?
Why are bifacial photovoltaic modules so popular?
... The popularity of glass/glass (G/G) photovoltaic (PV) module designs is growing rapidly due to an increased demand for bifacial photovoltaic (PV) modules, with additional applications in thin-film and buildingintegrated technologies.
Are perovskite based PV modules reliable?
Perovskite based PV modules: There are still plenty of reliability issues for perovskite-based PV module technologies in literature. There are many possible solutions, but they have not yet been evaluated in literature when combined in a single process solving all challenges at once.
What is a photovoltaic failure fact sheet (PVFS)?
The report explores several key areas of photovoltaic degradation and reliability, presenting both the challenges introduced by innovative technologies and the potential mitigation strategies. The report also includes an annex, the Photovoltaic Failure Fact Sheets (PVFS), which summarises some of the most important aspects of single failures.
What factors affect the reliability of advanced solar technology?
“The new report, Degradation and Failure Modes in New Photovoltaic Cell and Module Technologies, highlights key factors that impact the reliability of advanced solar technologies,” said Marc Köntges, a leading author of the report. “We identified common failure mechanisms and provide insights to improve long-term reliability and efficiency.
-
Glass photovoltaic panel greenhouse steel structure
Imagine a greenhouse that not only shelters crops but also powers itself – that's the magic of integrating glass photovoltaic panels with greenhouse steel structures. This hybrid solution is revolutionizing agriculture and renewable energy sectors globally.
-
Glass Photovoltaic Industry Demand
The Solar Photovoltaic Glass Market Report Segments the Industry by Glass Type (Tempered Glass, Anti-Reflective Coated Glass, and More), Manufacturing Process (Float Glass and Rolled Glass), Solar Technology (Crystalline Silicon, Cadmium-Telluride Thin Film, and More), Application (Residential and Non-Residential), and Geography (Asia-Pacific, North America, Europe, South America, and Middle East and Africa).
[PDF Version]
FAQs about Glass Photovoltaic Industry Demand
How big is the Solar Photovoltaic Glass market?
The Market Size and Forecasts for the Solar Photovoltaic Market are Provided in Terms of Volume (tons) for all the Above Segments. The Solar Photovoltaic Glass Market size is estimated at 27.11 Million tons in 2024, and is expected to reach 63.13 Million tons by 2029, growing at a CAGR of 18.42% during the forecast period (2024-2029).
Which industry has the highest CAGR in Solar Photovoltaic Glass market?
The utility scale industry holds major solar photovoltaic glass market share among all end-use industry and is expected to grow with the highest CAGR during the forecast period. Utility-scale solar plants provide the benefit of fixed-priced electricity during peak demand periods, when electricity from fossil fuels is the most expensive.
What factors boosting solar PV glass market growth?
The factors boosting solar PV glass market growth includes supportive government regulations toward installation of Solar PV plants. In addition, rise in demand for solar systems in residential, commercial, and utility scale boosts the growth of the solar PV glass market.
What is the fastest growing solar photovoltaic glass market segment?
Anti-Reflective Coated Glass is projected as the fastest growing segment. The solar photovoltaic glass market application/end-use industry segment is further divided into residential, commercial and utility scale. Region wise, the market is segmented into North America, Asia-Pacific, Europe and LAMEA.
Who are the major players in the Solar Photovoltaic Glass market?
The solar photovoltaic glass market is consolidated in nature. The major players in this market include Xinyi Solar Holdings Limited, Flat Glass Group Co., Ltd, AGC Inc., Nippon Sheet Glass Co., Ltd, and Saint-Gobain, among others (not in a particular order). Need More Details on Market Players and Competitors?
How big is the global photovoltaic glass market by 2033?
The global photovoltaic glass market is expected to touch USD 26.4 billion by 2033. What CAGR is photovoltaic glass market expected to exhibit by 2033?
-
Does anyone want photovoltaic glass panels
That is why researchers are exploring a breakthrough idea: what if the glass itself could generate electricity with transparent solar panels? Michigan State University (MSU) introduced the first fully clear solar panels in 2014, often called invisible solar panels or.
-
Can photovoltaic glass be transparent
Photovoltaic glass is probably the most cutting-edge new solar panel technology that promises to be a game-changer in expanding the scope of solar. These are transparent solar panels that can literally generate electricity from windows—in offices, homes, car's sunroof, or even. A transparent solar panel is essentially a counterintuitive idea because solar cells must absorb sunlight (photons) and convert them into power (electrons). When a solar glass is transparent, the sunlight will pass through the medium and defeat the purpose of. Solar panel blinds are a supplement to transparent solar glass/panels when using the window to generate electricity. Solar power panels are designed to harvest sunlight to produce. Just the way solar roof panels are currently produced using different technologies (Tesla's solar shingles and other technologies),. Researchers at Michigan State University and MIT as well as manufacturers such as Ubiquitous Energy, Physee, and Brite Solar are pioneers in promoting this new solar panel technology.
[PDF Version]
FAQs about Can photovoltaic glass be transparent
What is transparent photovoltaic glass?
Also known as solar windows, transparent solar panels, or photovoltaic windows, this glass integrates photovoltaic cells to convert solar energy into electricity, revolutionizing the way we think about energy efficiency and sustainable building design. Get a Quote Now!
Why is solar glass transparent?
When a solar glass is transparent, the sunlight will pass through the medium and defeat the purpose of utilizing sunlight. However, this new solar panel technology is changing the way solar cells absorb light.
What is Photovoltaic Glass?
Photovoltaic glass is probably the most cutting-edge new solar panel technology that promises to be a game-changer in expanding the scope of solar. These are transparent solar panels that can literally generate electricity from windows—in offices, homes, car's sunroof, or even smartphones.
What are transparent solar panels?
Transparent solar panels, also known as solar glass, are see-through photovoltaic (PV) technologies that can generate electricity from daylight. Unlike traditional opaque solar panels, these panels allow a portion of visible light to pass through them, making them ideal for use as certain types of window, as well as skylights and building facades.
Can transparent solar panels be used in architectural glass windows?
Ubiquitous Energy, in partnership with a leading glass manufacturer NSG Group, is developing Ubiquitous's unique ClearView Power technology to integrate transparent solar panels into architectural glass windows. ClearView Power's transparent solar coating can be directly applied to building windows at the time of the normal glass making process.
Can a skyscraper use transparent photovoltaic glass?
Skyscrapers are one of the first candidates for the use of transparent photovoltaic glass due to the nature of their facades. In fact, ten years ago, there was already talk of integrating these solar windows in the Willis Tower, the tallest skyscraper in Chicago. However, if there is one building in which glass predominates, it is greenhouses.
-
Solar photovoltaic panels vs cadmium telluride glass
Cadmium Telluride solar panels are the most popular thin-film solar panels available in the market. These represent around 5% of the solar panels in the world market and come only second tocrystalline silicon panels. Understanding CdTe thin-film solar panels, is vital to know the true. CdTe solar panels are not the only thin-film panels in the market. Aside from these, there are three main options available: 1. Amorphous silicon (a-Si) solar panels 2. Copper indium gallium selenide (CIGS) solar panels 3. Gallium arsenide (GaAs) solar panels. Even though CdTe panels are not always the best option for residential applications, these panels are quite versatile for commercial and. CdTe solar panels and crystalline silicon solar panelsare very different technologies. To know which one is the best technology, we. There should not be any doubts regarding the popularity of CdTe technology as the best thin-film solar panel. These modules are cheap, lightweight, resistant, have high efficiency, and are easy to manufacture, making them excellent for a wide variety of applications. While.
[PDF Version]
FAQs about Solar photovoltaic panels vs cadmium telluride glass
Are cadmium telluride solar panels cheaper?
Cadmium telluride (CdTe) solar panels have a significant pro when it comes to cost. They are generally cheaper to produce than other solar panels, such as crystalline silicon panels. This is mainly because CdTe uses less material and has a shorter manufacturing process.
Is cadmium telluride a good material for thin-film solar panels?
Yes, cadmium telluride (CdTe) is an effective material for thin-film solar panels. However, its commercial efficiency, typically around 16-19%, is lower than that of monocrystalline panels, which currently approaches 25%.
How efficient are cadmium telluride solar cells?
The efficiency of Cadmium Telluride (CdTe) solar cells ranges from 8% to 22%, although their average efficiency is around 18%. The efficiency of CdTe solar cells is crucial as it directly impacts the energy conversion rate: how effectively sunlight can be converted into electrical energy.
What is cadmium telluride (CdTe) solar?
The Cadmium Telluride (CdTe) solar technology was first introduced in 1972 when Bonnet and Rabenhorst designed the CdS/CdTe heterojunction that allowed the manufacturing of CdTe solar cells. At first, CdTe panels achieved a 6% efficiency, but the efficiency has tripled to this day.
What is the difference between cadmium and tellurium?
Cadmium offers high electrical conductivity, while tellurium contributes to the material's ability to absorb light and convert it into electricity – a property essential for photovoltaic function. In the structure of solar cells, cadmium telluride is applied in thin layers.
How do cadmium telluride solar panels work?
The process begins when sunlight, comprised of photons, strikes the CdTe layer. The photons excite the electrons in the semiconductor, creating an electrical current. This current is then harnessed and converted into usable electricity. How are Cadmium Telluride solar panels made?