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Material Control for High-Efficiency Amorphous Silicon Solar Cells

Published online by Cambridge University Press:  01 January 1993

Yoshihiro Hishikawa ,
Manabu Sasaki ,
Sadaji Tsuge ,
Shingo Okamoto  and
Shinya Tsuda
Yoshihiro Hishikawa
Affiliation:
Functional Materials Research Center, SANYO Electric Co., Ltd., 1-18-13 Hashiridani, Hirakata, Osaka 573 JAPAN
Manabu Sasaki
Affiliation:
Functional Materials Research Center, SANYO Electric Co., Ltd., 1-18-13 Hashiridani, Hirakata, Osaka 573 JAPAN
Sadaji Tsuge
Affiliation:
Functional Materials Research Center, SANYO Electric Co., Ltd., 1-18-13 Hashiridani, Hirakata, Osaka 573 JAPAN
Shingo Okamoto
Affiliation:
Functional Materials Research Center, SANYO Electric Co., Ltd., 1-18-13 Hashiridani, Hirakata, Osaka 573 JAPAN
Shinya Tsuda
Affiliation:
Functional Materials Research Center, SANYO Electric Co., Ltd., 1-18-13 Hashiridani, Hirakata, Osaka 573 JAPAN
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Abstract

A total-area conversion efficiency of 12.0% (100cm2) has been achieved for a single-junction a-Si solar cell. The film deposition rate (Rd) plays an essential role in controlling the optical and electrical properties of "device-quality" a-Si:H for high-efficiency solar cells. The properties of conventional "device-quality" a-Si:H films deposited from 100% SiH4 are primarily determined by the balance between Ts and Rd. A lower or higher deposition rate results in a-Si:H with a narrower or wider bandgap, respectively. This enables the properties of a-Si:H to be controlled independent of Ts. The controllable range of a-Si:H properties can be widened by effectively utilizing factors such as ion bombardment. For example, a high dilution of SiH4 with H2 ( H2 SiH4 = 10 or more) or an H2 plasma treatment after deposition results in a-Si:H with a very wide bandgap and low defect density, which cannot be achieved by using 100% SiH4- Controlling the properties of a-Si:H by applying vibrational / rotational energy is also investigated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 297: Symposium A – Amorphous Silicon Technology - 1993 , 1993 , 779
Copyright
Copyright © Materials Research Society 1993

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References

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