2/20/2023 0 Comments Solarcell ir coatingSince it is often not possible to obtain a pure macroscopic (crystalline) material, it may be possible to press the material into a (uniform, void-free) disk. That is, materials where the Fresnel equations are operant since there is no light scattering. The optical constants n and k can be used to model infrared spectra, including refraction, absorption, reflectance, and emissivity, but obtaining reliable values for solid materials (pure or otherwise) presents a challenge: In the past, the best results for n and k have been obtained from bulk, homogeneous materials, free of defects. The origin and concept of peaks in the vibrational spectra of glasses is discussed. The TASR-IR method is applied to silica, silicate, borosilicate, and boroaluminosilicate glasses tentative peak assignments of glass network vibrations are proposed. The TASR-IR method allows one to obtain the peak positions and intensities of fundamental network vibration modes of glass from the imaginary component (k) of complex refractive index without convolutions from the dispersion effect more » due to chains in the real component (n) of refractive index. The results obtained from TASR-IR are comparable with the values obtained from spectroscopic ellipsometry. The method is named as two-angle SR-IR (TASR-IR), since it is based on the Fresnel equations of specular reflectance at two incidence angles (10° and 45°). « lessĪ novel mathematical algorithm was developed to calculate refractive index (n + ik) from specular reflectance infrared (SR-IR) spectra in the strongly-absorbing glass network vibration region. Predictions of system performance were made for various collector/reflector configurations and compared with the performance of an optimally oriented collector without a reflector. The reflective properties of a given surface can be measured in the laboratory as a function of incident and reflected angles, and these measured reflective properties can be used in the computer model to predict the increase in collector performance with such a reflector. A computer model has been generated to describe surfaces as a combination of specular- and diffuse-like reflectivities. Most real surfaces possess a combination of specular-like and more » diffuse-like reflective properties. This present work differs from that of other investigators principally in that an attempt has been made to describe the reflective properties of surfaces in more generalized terms than simple direct or simple diffuse. ![]() Specular, diffuse, and combination specular/diffuse reflective surfaces are discussed. The results of theoretical calculations and experimental tests on the use of different types of flat reflective surfaces to increase the collection of solar energy by flat collectors are presented. ![]() The use of planar reflective surfaces can substantially improve the performance of both active and passive solar collectors. The obtained results showed that the degradation of Solar Cell transmission.= , ![]() The Solar Cells stability to solar light with Poss coating was also evaluated. The coatings Transmittances were equal 100% that are ideal for Solar Cell films. Evaluation of the obtained results showed that the efficiency of Solar Cells was improved twice or more (50%) compared with that without Poss coating. The structural, morphological, thermal, optical and electrical properties were investigated by TEM, FTIR, NMR, FE-SEM, TGA, UV-VIS spectroscopy and solar simulator. In the present work, firstly Tetraglycidyloxypropyl tetramethyl Poss was synthesized via sol-gel method and used to prepare TGTM Poss-silica nanocomposite, then it was applied on Solar Cell slides. The new polymeric protecting materials are called polyhedral oligomeric silsesquioxanes ( Poss) that can improve the Solar Cells properties. One of the most important challenges of obtaining of high-efficiency thin films of Solar Cells is creation an effective light trapping system. In the recent years many efforts have been done to develop and improve of Solar Cell films with high electrical output. Abstract Various Antireflection thin films are often used to cover glass to increase Solar Cell electrical parameters.
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