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We report the growth and characterization of the Zn1−xCdxTe1−yOy (ZnCdTeO) layers on ZnTe substrates by molecular beam epitaxy technique for the application of intermediate band solar cells. ZnCdTeO layers with a wide range of Cd and O contents of 0–0.7 and 0.005–0.02, respectively, were grown by changing Cd/(Cd+Zn) flux ratio and O radical supply. The decrease of the transition energy from valence...
Coupling perovskite and silicon solar cells in a tandem configuration is considered an attractive method to increase conversion efficiency beyond the single-junction Shockley-Queisser limit. While a mechanically-stacked perovskite/silicon tandem solar cell has been demonstrated, a method to electrically couple perovskite and silicon solar cell in a monolithic configuration has not been demonstrated...
Semi-transparent photovoltiacs are of interest for improving integration of solar energy harvesting with architecture. However, the competing requirements of optical transparency and efficient absorption of the incident spectrum severely limit performance. To address this tradeoff, we propose an angle selective organic photovoltaic window structure, structured such that normally incident light is...
Rear surface reflector of solar cell is designed to improve light collection capacity by allowing the low energy photons to go through multiple bounces inside the solar device before escaping. In this paper, we investigate the thickness effect of rear SiO2 surface passivation layer on both optical and electrical properties of front-planar high efficiency PERT (Passivated Emitter and Rear Totally-Diffused)...
Conversion of solar energy into electricity is considered one of the most promising solutions to the energy problem. Conventional III-V solar cells are designed such that their optical depth for absorption relates directly to the thickness of the absorbing material. This results in relatively thick solar cell structures consuming valuable semiconductor material and increasing the solar cell manufacturing...
In this paper, a discussion is made of the design of silicon cells to be used in a six-junction tandem solar cell structure as part of the Very High Efficiency Solar Cell (VHESC) program. Minority carrier recombination at surfaces and in the volume, internal quantum efficiency, resistance losses, free carrier parasitic absorption, optical reflection, light trapping, and light absorption must be traded...
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