Study on Tandem Solar Cell by Simulation

• Main Authors: Li-Hua Wang, 王藜樺
• Other Authors: 洪勝富
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/10235742267096423469

碩士 === 國立清華大學 === 光電工程研究所 === 96 === There has been an intensive search for tandem solar cell since the structure improving power conversion efficiency. The object of this study is to understand the important of current match in tandem solar cell. We use simulation software ATLAS to model InGaP/GaAs tandem solar cell. By illuminating fixed total light power and change two different wavelength’s power ratio to achieve current match and mismatch conditions. We compare the simulation result of InGaP/GaAs tandem solar cell, InGaP top cell and GaAs bottom cell. In the result of simulation, Isc of InGaP/GaAs tandem cell is restricted between Isc of top cell and bottom cell. Voc of InGaP/GaAs tandem cell is about Voc of InGaP top cell and GaAs bottom cell add together. Tandem cell achieve the best short-circuit current of -0.669901, power conversion efficiency of 23.7% under current match condition. Short-circuit current and power conversion efficiency decrease as two cell current mismatch increase. When two cell absorb power ratio is 1:49, we get short-circuit current of -0.026829, power conversion efficiency of 1.07%. So current match can get better short-circuit current and power conversion efficiency.