Influence of hydrogen on the properties of titanium doped hydrogenated amorphous silicon prepared by sputtering

被引：2
|
作者：
Zhou, Tianwei [1 ]
Zuo, Yuhua [1 ]
Qiu, Kai [1 ]
Zheng, Jun [1 ]
Wang, Qiming [1 ]
机构：
[1] Chinese Acad Sci, Inst Semicond, State Key Lab Integrated Optoelect, Beijing 100083, Peoples R China
来源：
VACUUM | 2016年 / 125卷
基金：
中国国家自然科学基金;
关键词：
Titanium doped hydrogenated amorphous silicon; Photosensitivity; Microstructure factor; Unintended oxygen; CARBON ALLOY-FILMS; THIN-FILMS; DEPOSITION PARAMETERS; VAPOR-DEPOSITION; SOLAR-CELLS; SI-H; EFFICIENCY; GERMANIUM;
D O I：
10.1016/j.vacuum.2015.08.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Titanium doped hydrogenated amorphous silicon (a-Si:Ti(H)) with different gas ratio (r(H) = H-2/Ar) were prepared by rf co-sputtering in mixture of hydrogen and argon, with fixed Ti content. The optical, structural and optoelectronic properties of the prepared a-Si:Ti(H) were investigated systematically by Spectroscopic Ellipsometry (SE), photo/dark conductivity and Fourier Transform Infrared (FTIR) measurements. With hydrogen introducing into a-Si: Ti network, the optical bandgap of a-Si:Ti(H), dark current and photosensitivity (Ratio of photo conductivity to dark conductivity) improved. However, although detectable photosensitivity occurs at r(H) of 0.3, it has relatively larger microstructure factor R and less compact structure compared with r(H) of 0.2 and 0.4. It is found that unintended oxygen content plays an important role in improving photosensitivity, and the relationship between microstructure, optical and photosensitivity of a-Si:Ti (H) was discussed in detail. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：93 / 97
页数：5
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