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Hydrogenated Nanocrystalline Silicon based Solar Cell with 13.6% Stable Efficiency

Published online by Cambridge University Press:  10 May 2012

Guozhen Yue ,
Baojie Yan ,
Laura Sivec ,
Tining Su ,
Yan Zhou ,
Jeff Yang  and
Subhendu Guha
Guozhen Yue
Affiliation:
United Solar Ovonic LLC, 1100 West Maple Road, Troy, Michigan, 48084, USA
Baojie Yan
Affiliation:
United Solar Ovonic LLC, 1100 West Maple Road, Troy, Michigan, 48084, USA
Laura Sivec
Affiliation:
United Solar Ovonic LLC, 1100 West Maple Road, Troy, Michigan, 48084, USA
Tining Su
Affiliation:
United Solar Ovonic LLC, 1100 West Maple Road, Troy, Michigan, 48084, USA
Yan Zhou
Affiliation:
United Solar Ovonic LLC, 1100 West Maple Road, Troy, Michigan, 48084, USA
Jeff Yang
Affiliation:
United Solar Ovonic LLC, 1100 West Maple Road, Troy, Michigan, 48084, USA
Subhendu Guha
Affiliation:
United Solar Ovonic LLC, 1100 West Maple Road, Troy, Michigan, 48084, USA
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Abstract

Multi-junction solar cells incorporating hydrogenated nanocrystalline silicon (nc-Si:H) exhibit a high current capability and low light-induced degradation. In this paper, we report our recent progress in developing nc-Si:H solar cells using a modified very-high-frequency glow discharge technique. We achieved a short-circuit current density >30 mA/cm2and 10.6% conversion efficiency from single-junction solar cells. Using the improved nc-Si:H cells in an a-Si:H/nc-Si:H/nc-Si:H triple-junction structure, we attained initial and stabilized efficiencies of 13.9% and 13.6%, respectively. Issues related to improving material properties and device structures are addressed. Besides using the conventional techniques, such as hydrogen dilution profiling, optimized Ag/ZnO back reflector, and buffer layers, we found that compensation from Boron and Oxygen micro-doping is also critical in obtaining the above achievements.

Keywords

nanostructurephotovoltaicthin film
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1426: Symposium A – Amorphous and Polycrystalline Thin-Film Silicon Science and Technology–2012 , 2012 , pp. 33 - 38
Copyright
Copyright © Materials Research Society 2012

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References

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