Effects of post-CdCl/sub 2/ treatment and pre-Cd treatment on the performance and stability of CdTe cells

Author

Yun, Jae Ho ; Ahn, Byung Tae ; Feldman, Scott ; Ohno, Timothy R.

Author_Institution

Dept. of Mater. Sci. & Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

1

fYear

2003

fDate

18-18 May 2003

Firstpage

438

Abstract

Post CdCl/sub 2/ heat treatment affected initial photovoltaic property and stability of CdTe cell. The cell efficiency was improved as CdCl/sub 2/ heat treatment time increased but that was reduced with 45 min heat treatment. The CdTe cell with non-heat treatment was degraded severely during aging for 3500 h and was recovered by the reverse bias. But the CdTe cells with 30 min and 45 min heat treatment were not degraded relatively regardless of initial efficiency and were not recovered by the reverse bias. It might be due to the reduction of the Cd vacancy in CdTe layer. Pre Cd treatment on CdS film by electrochemical method restricted inter-diffusion of S and Te at the CdS/CdTe interface. And it improved morphology of CdS-CdTe interface so the efficiency increased by the increase of J/sub SC/.

Keywords

II-VI semiconductors; ageing; cadmium compounds; chemical interdiffusion; heat treatment; interface structure; photovoltaic effects; semiconductor thin films; short-circuit currents; solar cells; vacancies (crystal); Cd vacancy; CdS/CdTe interface; CdTe-CdS; aging; cell efficiency; cell performance; chemical interdiffusion; electrochemical method; heat treatment; photovoltaic property; post-CdCl2 treatment; pre-Cd treatment; reverse bias;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Energy Conversion, 2003. Proceedings of 3rd World Conference on

Conference_Location

Osaka, Japan

Print_ISBN

4-9901816-0-3

Type

conf

Filename

1305314