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Light Soaking and Thermal Annealing Effects on the Micro-Electrical Properties of Amorphous and Nanocrystalline Mixed-phase Silicon Solar Cells

Published online by Cambridge University Press:  01 February 2011

Chunsheng Jiang ,
B. Yan ,
H. R. Moutinho ,
M. M. Al-Jassim ,
J. Yang  and
S. Guha
Chunsheng Jiang
Affiliation:
[email protected], National renewable energy laboratory, NCPV, 1617 Cole Blvd., Golden, CO, 80401, United States, 303-384-6687, 303-384-6604
B. Yan
Affiliation:
[email protected], United Solar Ovonic LLC, Troy, MI, 48084, United States
H. R. Moutinho
Affiliation:
[email protected], National renewable energy laboratory, Golden, CO, 80401, United States
M. M. Al-Jassim
Affiliation:
[email protected], National renewable energy laboratory, Golden, CO, 80401, United States
J. Yang
Affiliation:
[email protected], United Solar Ovonic LLC, Troy, MI, 48084, United States
S. Guha
Affiliation:
[email protected], United Solar Ovonic LLC, Troy, MI, 48084, United States
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Abstract

We report on the measurement of local current flow in hydrogenated amorphous and nanocrystalline mixed-phase n-i-p silicon solar cells in the initial, light-soaked, and annealed states using conductive atomic force microscopy (C-AFM). The C-AFM measurement shows that the nanometer-size grains aggregate, and the local current densities in the nanocrystalline aggregation areas decreased significantly after light soaking and recovered to values similar to the initial state after annealing at a high temperature in a vacuum. This result supports the model of two parallel-connected diodes for explaining the light-induced open-circuit voltage increase in the mixed-phase solar cells.

Keywords

Siamorphousphotovoltaic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 989: Symposium A – Amorphous and Polycrystalline Thin-Film Silicon Science and Technology-2007 , 2007 , 0989-A02-05
Copyright
Copyright © Materials Research Society 2007

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