![]() Optical properties (transmittance, refractive index, reflectance, and absorptance) of candidate materials (including PMMA, soda-lime glass, borosilicate glass, and quartz refractors), components (including Ag- and Al-enabled reflectors), and encapsulants (including EVA, ionomer, PDMS, PPMS, polyolefin, and PVB) were identified. Measurements of optical components are used to assess expected optical performance and quantify damaging optical exposure. To better define the stress inherent to CPV systems, the UV and infrared spectra transmitted through representative optical systems were evaluated. For example, the present qualification test for CPV modules includes only real-time ultraviolet (UV) exposure, i.e., methods for accelerated UV testing have not yet been developed. The reliability of encapsulation materials used in CPV systems, however, is not well established. ![]() Also, preliminary IRR coating designs have been evaluated by applying them on high efficiency 3-junction solar cells, and the performance data are used to help predict optimal designsĬoncentrating photovoltaic (CPV) technology has recently gained interest based on its scalability and expected low levelized cost of electricity. In this paper, this key issue is discussed. Achieving higher power output requires an appropriate IRR coating design that carefully balances the reduction in the cell absorptance against the Ge subcell current output. For many space applications, coverglass incorporated with infrared reflecting (IRR) coatings can be applied to these solar cells for the purpose of lowering the cell operating temperature and/or improving the power output from the solar arrays. This can be achieved by rejecting a part of the incident sunlight that would otherwise be absorbed and converted into heat by the Ge subcell. Because the solar cell efficiency decreases with higher temperatures, it is desirable to maintain a lower cell operating temperature. The excess current is converted into heat, and as a result, increases the cell operating temperature. Customers will be able to meet the Heraeus Noblelight experts at the Heraeus stand during the exhibition.It is well known that the Ge subcell in multijunction GaInP/GaAs/Ge based solar cells produces a significantly higher photogenerated current (nearly 2x) than the other two subcells connected in series. Heraeus exhibits its full range of products and services at the 11th SNEC International Photovoltaic Power Generation Conference & Exhibition 2017 in Shanghai. ![]() Heraeus and its experts will be able to contribute about one-third to this cost reduction,” said Andreas Liebheit, President Heraeus Photovoltaics. We are convinced that by increasing efficiencies throughout the whole value chain the costs of renewable energies can be reduced by a further 50 percent within the next five years. We apply this to develop much stronger into a provider of comprehensive technology and service solutions for our customers. “Heraeus Photovoltaics holds an unrivaled technological and process knowledge in the Photovoltaic Industry. The high quality of the IR-emitters also ensures increased uptimes. Furthermore, the instant heat emission allows the homogenous heating of solar cell wafers with very fast response times of 1-2 seconds. Due to their high reliability and consistency of heating process an increased production yield is possible. Heraeus IR-emitter solutions are tailor-made for the short and medium IR-wavelengths required in different process steps of the solar cell production. Quartz glass is also resistant to acids, lyes and other aggressive substances. As the reflector is coated with nano opaque (white) quartz glass (QRC), the IR-emitters allows for a very compact design and thus requires very little working space. Its outstanding stable temperature resistance enables applications under vacuum and ensures a particularly consistent process and increases the overall energy efficiency of the production process. The IR-emitters are entirely made out of quartz glass, which has an unmatched purity to avoid contamination and allows the transfer of large amounts of energy in a contact free manner. IR-emitters react instantly and are therefore easy to control and regulate. Heraeus Photovoltaics, a leading provider of Heraeus Photovoltaics, a leading provider of technology and service solutions for the renewable energy industry, is now offering innovative Infrared Emitters (IR-emitters) for optimized diffusion, Anti-Reflective Coating and drying processes in silicon solar cell production.
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