Enhancement of optical absorption for below 5 mu m thin-film poly-Si solar cell on glass substrate

被引:10
|
作者
Nakajima, A
Suzuki, T
Yoshimi, M
Yamamoto, K
机构
[1] Central Research Laboratories, Kaneka Corporation, Kobe 652, Yoshida-cho, Hyogo-ku
关键词
optical absorption; thin films; poly-Si solar cells; glass substrate;
D O I
10.1016/S0927-0248(97)00114-1
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Optical confinement effect of thin-film polycrystalline-Si (poly-Si) solar cell on glass substrate fabricated at low-temperature has been investigated as a function of cell thickness of less than 5 mu m. We found that it is possible to fabricate the textured Si thin film in situ on a glass substrate and that the reflectance at long-wavelength light is reduced by surface texturing. Thin-film poly-Si solar cell and a-Si:H (0.45 mu m)/poly-Si (5 mu m) tandem solar cell exhibit the efficiency of 8.6% and 12.8%, respectively. The numerical study in terms of the light trapping explains the excellent high short-circuit current density (J(sc) above 27 mA/cm(2) at the 4.7 mu m thin-film poly-Si solar cell.
引用
收藏
页码:287 / 294
页数:8
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