Mid-gap states measurements of low-level boron-doped a-Si:H films

被引:6
|
作者
Theil, J [1 ]
Lefforge, D [1 ]
Kooi, G [1 ]
Cao, M [1 ]
Ray, GW [1 ]
机构
[1] Hewlett Packard Co, HP Labs, Palo Alto, CA 94304 USA
关键词
D O I
10.1016/S0022-3093(99)00847-9
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Previous measurements of the effects of low-level boron-doping on a-Si:H thin films indicated that the conductivity decreased as a function of boron concentration. This effect was reinvestigated in this work by measuring the leakage current of stacked p-i-n diodes as a function of boron concentration. The supporting measurements employed films deposited onto insulating substrates. The diodes were also examined by a charge recovery measurement to measure the dangling-bond density of states (DOS) near between 0.7 and 1.0 eV from the conduction band edge. The spectrum shows a broad band with a peak at 0.88 eV, which increases as a function of the boron concentration, but does not shift with respect to energy. The dangling-bond density increase is proportional to the B2H6/SiH4 gas how ratio, but not linear with respect to boron concentration in the film. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:569 / 573
页数:5
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