Title :
Approaching 20% efficiency with a-Si/poly-Si tandem solar cell
Author :
Ma, W. ; Horiuchi, T. ; Yoshimi, M. ; Hattori, K. ; Okamoto, H. ; Hamakawa, Y.
Author_Institution :
Fac. of Eng. Sci., Osaka Univ., Osaka, Japan
Abstract :
A high-efficiency a-Si/poly-Si four-terminal tandem solar cell has been developed. By the optimization of each layer thickness and optical features of the top and bottom cells, the authors obtained a conversion efficiency of 19.1% with a good stability and repeatability. There appears to be a possibility of achieving conversion efficiency exceeding 20% with the four-terminal tandem device through careful optimization of the a-Si top cell and optical matching between the two cells
Keywords :
amorphous semiconductors; elemental semiconductors; silicon; solar cells; 19.1 percent; Si; layer thickness; optical matching; optimization; repeatability; semiconductors; stability; tandem solar cell; Conducting materials; Conductivity; Crystalline materials; Degradation; Fabrication; Glass; Heterojunctions; Photonic band gap; Photovoltaic cells; Solar power generation;
Conference_Titel :
Photovoltaic Specialists Conference, 1991., Conference Record of the Twenty Second IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
0-87942-636-5
DOI :
10.1109/PVSC.1991.169433
