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Photocarrier Transport and Recombination in Amorphous Silicon

Published online by Cambridge University Press:  01 January 1993

C.R. Wronski ,
R.M. Dawson ,
M. Gunes ,
Y.M. Li  and
R.W. Collins
C.R. Wronski
Affiliation:
Electronic Materials Processing Research Laboratory, The Pennsylvania State University, University Park, PA 16802
R.M. Dawson
Affiliation:
Electronic Materials Processing Research Laboratory, The Pennsylvania State University, University Park, PA 16802
M. Gunes
Affiliation:
Electronic Materials Processing Research Laboratory, The Pennsylvania State University, University Park, PA 16802
Y.M. Li
Affiliation:
Electronic Materials Processing Research Laboratory, The Pennsylvania State University, University Park, PA 16802
R.W. Collins
Affiliation:
Electronic Materials Processing Research Laboratory, The Pennsylvania State University, University Park, PA 16802
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Abstract

The effect of microstructure in undoped a-Si:H films on carrier transport, recombination, densities of midgap states and solar cell characteristics has been investigated. Extended state mobilities of electrons were obtained from photo and dark conductivity measurements between 40° C and 190° C and the gap states characterized using Dual Beam Photoconductivity. In these films the estimated room temperature electron mobilities increase from about 1 to 30 cm2/V sec as the dihydride concentrations and void volume fractions decrease. It is found that the carrier mobility-lifetime products are not solely determined by the dangling bond states. The effects of changes in the mobilities and midgap states on p-i-n homojunction solar cell characteristics are presented and discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 297: Symposium A – Amorphous Silicon Technology - 1993 , 1993 , 443
Copyright
Copyright © Materials Research Society 1993

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References

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