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Utilization of low power indoor devices such as remote sensors, supervisory and alarm systems, distributed controls, and data transfer system are on steady rise. Due to remote and distributed nature of these systems, it is attractive to avoid using electrical wiring to supply power to them. Primary batteries have been used for this application for many years but they require regular maintenance at...
Manufacturing technology is being developed for the mass-production III–V multijunction solar cells and receiver sub-assemblies to help enable the emerging concentrator PV industry. Production contracts of various sizes have allowed us to begin exercising this manufacturing technology, and significant momentum has been realized toward fulfilling large production contracts. Over 400,000 solar cells...
This paper presents a detailed discussion on optimization of design parameters of thick phase holographic lenses to achieve wavelength selective concentrating system. Such lenses perform the dual function of dispersion and focusing and thus can be used for filtering out the unwanted portion of the solar spectrum. The present investigation reveal that design parameters such as refractive index modulation...
An all solution processed tandem photovoltaic structure, consisting of a hydrazine treated PbSe nanocrystal photoconducting film and a P3HT/PCBM bulk heterojunction solar cell, was fabricated. The PbSe nanocrystal cell was use as the top (light incident from top) cell, and optimized in thickness, to absorb predominantly UV and short wavelength visible light. The lower P3HT/PCBM cell absorbed the remaining...
We present a systematic analysis of the correlation of current mismatch in a-Si:H/nc-Si:H double-junction solar cell fill factor (FF) measured under colored lights. First, we propose a diagnostic method to evaluate the FFs of component cells in multi-junction solar cells using current-voltage measurements under colored lights. The analysis reveals that the over-estimated FF when a colored light is...
The experimental technique for determining the minority carrier lifetime within the base region of p-n junction solar cells is presented in this paper. The value of minority carrier lifetime is of tremendous use in estimating the performance of solar cell. The procedure is to illuminate the solar cell with a flash of white light from light source for say, microseconds and then to monitor the decay...
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