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Thermophotovoltaics (TPV) is concerned with the application of photovoltaic diodes to harvest electricity from thermal radiation. This is achieved through the use of appropriately designed thermal emitters which are typically heated to temperatures of more than 800°C. Merits of thermophotovoltaics include the prospect of delivering high power density compared to solar photovoltaics, fuel versatility,...
High performance in crystalline thin (∼ 10 μm) film silicon solar cells requires complete optical absorption over its spectral range. Geometrical schemes are ineffective due to their large feature dimensions. Enhanced optical absorption can be achieved through two mechanisms based on diffractive and physical optics. In diffractive approach, light confinement is achieved through obliquely propagating...
Application of randomly created sub-wavelength structures using either wet- or dry chemical mechanisms in Si must serve two purposes, i.e., reduces reflection and enhance near IR absorption. This absorption enhancement can only occur through diffractive scattering from random surfaces with feature dimensions of ≫ λ/n, where n is Si refractive index. For surface features with sizes ≪ λ/n, no internal...
It has been estimated that 1 MWp cell production requires almost 10 million liters of de-ionized water, not including chemicals such as HF, HCl, and NaOH. Consideration of the current industry trends, including use of thinner Si wafers and growing incompatibility screen-printed Al-alloyed back surface filed (BSF) formation on increasingly thinner wafers due to wafer warpage and increasing Al costs,...
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