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        Thickness Optimization of ZnO/CdS/CdTe Solar Cell by Numerical Simulation

        Devanshi Parashar,V. S. Ganesha Krishna,Sahana Nagappa Moger,Rashmitha Keshav,M. G. Mahesha 한국전기전자재료학회 2020 Transactions on Electrical and Electronic Material Vol.21 No.6

        CdTe based solar cells with high effi ciency alternative to solar cells from elemental semiconductors is an important work carried out over the decades. However, the research has not yet yielded the highest possible effi ciency with CdTe absorber. Selection of suitable window layer and optimizing the thickness of the diff erent layers is still a quest in researchers. Numerical simulation of the diff erent material combinations can speed up the research work. In this regard, numerical simulation is an essential tool to fi nd the optimized structure for the enhanced device performance. In the present work, the thicknesses of window and absorber layers, one of the crucial factors that aff ect the solar cell performance, are tuned for ZnO/CdS/CdTe system. In case of CdS/CdTe solar cells, spectral loss created by CdS lowers the cell effi ciency. Concept of bilayer window is useful to minimize the loss at window layer. Hence the ZnO/CdS bilayer window is adopted and demonstrated that the cell effi ciency can be increased up to 17.66% with current density of 28.4 mA/cm 2 and 73.7% fi ll factor.

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