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Kinetics of Light-Induced Changes in P-I-N Cells with Protocrystalline Si:H

Published online by Cambridge University Press:  15 February 2011

R.J. Koval ,
J. Koh ,
Z. Lu ,
Y. Lee ,
L. Jiao ,
R.W. Collins  and
C.R. Wronski
R.J. Koval
Affiliation:
The Center For Thin Film Devices, The Pennsylvania State University, University Park, PA 16802, USA, crwece@engr.psu.edu
J. Koh
Affiliation:
The Center For Thin Film Devices, The Pennsylvania State University, University Park, PA 16802, USA, crwece@engr.psu.edu
Z. Lu
Affiliation:
The Center For Thin Film Devices, The Pennsylvania State University, University Park, PA 16802, USA, crwece@engr.psu.edu
Y. Lee
Affiliation:
Currently at Silicon Storage Technology, Inc., 1171 Sonora Court, Sunnyvale, CA, 94086
L. Jiao
Affiliation:
The Center For Thin Film Devices, The Pennsylvania State University, University Park, PA 16802, USA, crwece@engr.psu.edu
R.W. Collins
Affiliation:
The Center For Thin Film Devices, The Pennsylvania State University, University Park, PA 16802, USA, crwece@engr.psu.edu
C.R. Wronski
Affiliation:
The Center For Thin Film Devices, The Pennsylvania State University, University Park, PA 16802, USA, crwece@engr.psu.edu
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Abstract

Studies have been carried out on the thickness dependent transition between the amorphous and microcrystalline phases in intrinsic Si:H materials (i-layers) and its effect on p-i-n solar cell performance [1]. P(a-SiC:H)-i(a-Si:H)-n(μcSi:H) cell structures were deposited with the intrinsic Si:H layer thickness and the flow ratio of hydrogen to silane, R=[H2]/[SiH4], guided by an evolutionary phase diagram obtained from real-time spectroscopic ellipsometry. The thickness range over which the fill factors are controlled by the bulk was established and their characteristics investigated with different protocrystalline i-layer materials (i.e., materials prepared near the amorphous to microcrystalline boundary but on the amorphous side). Insights into the properties of these materials and the effects of the transition to the microcrystalline phase were obtained from the systematic changes in the initial fill factors, their light-induced changes, and their degraded steady states for cells with i-layers of different thickness and H2 dilution.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 557: Symposium A – Amorphous and Heterogeneous Silicon Thin Films—Fundamentals to Devices—1999 , 1999 , 263
Copyright
Copyright © Materials Research Society 1999

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