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Applied Science and Convergence Technology 2012; 21(4): 219-224

Published online July 1, 2012

Copyright © The Korean Vacuum Society.

Long-Term Performance of Amorphous Silicon Solar Cells with Stretched Exponential Defect Kinetics and AMPS-1D Simulation

S. H. Park , Jong H. Lyou

Abstract

We study for long-term performance of amorphous silicon solar cells under light exposure. The performance is predicted with a kinetic model in which the carrier lifetimes are determined by the defect density. In particular, the kinetic model is described by the stretched-exponential relaxation of defects to reach equilibrium. In this report, we simulate the light-induced degradation of the amorphous silicon solar cells with the kinetic model and AMPS-1D computer program. And data measured for outdoor performances of various solar cells are compared with the simulated results. This study focuses on examining the light-induced degradation for the following amorphous silicon pin solar cells: thickness?300 nm, built-in potential?1.05 V, defect density (at t=0)?5×10¹? ㎝?³, short-circuit current density (at t=0)?15.8 ㎃/㎠, fill factor (at t=0)?0.691, open-circuit voltage (at t=0)?0.865 V, conversion efficiency (at t=0)?9.50%.

Keywords: 비정질실리콘 태양전지,광유도 성능감소,결함밀도,확장지수함수 완화법칙,모의실험,Amorphous silicon solar cells,Light-induced degradation,Defect density,Strectched-exponential relaxation,Simulation

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