Comparison study of close-spaced sublimated and chemical bath deposited CdS films: Effects on CdTe solar cells

被引：5

作者：

Albin, D ^{[1
]}

Rose, D ^{[1
]}

Dhere, R ^{[1
]}

Levi, D ^{[1
]}

Woods, L ^{[1
]}

Swartzlander, A ^{[1
]}

Sheldon, P ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

CONFERENCE RECORD OF THE TWENTY SIXTH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE - 1997 | 1997年

关键词：

D O I：

10.1109/PVSC.1997.654104

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：

Close-spaced-sublimated (CSS) CdS films exhibit strong fundamental edge luminescence, high optical absorption, and a bandgap of similar to 2.41 eV. Structurally, these films show good crystallinity with thickness-dependent grain sizes that vary between 100-400 nm. In contrast, chemical-bath-deposited (CBD) CdS exhibits subband luminescence, lower absorption, and a thickness-dependent bandgap. These films have CdS grains typically less than 50 nm in size and poorer crystallinity. However, CdTe devices fabricated with these lower "quality" CBD CdS films yield higher V-oc's and fill factors. Carrier lifetimes in finished CSS CdS devices measured between 100 and 200 ps while lifetimes in CBD CdS devices were much higher (>500 ps). Compositional differences in the Cd/(S+Te) ratio at the interface suggest the possibility of lower CdS doping and higher CdTe compensation as one reason for lower V-oc's in CSS CdS devices.

引用

页码：367 / 370

页数：4