Journal
CANADIAN JOURNAL OF PHYSICS
Volume 92, Issue 7-8, Pages 932-935Publisher
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/cjp-2013-0640
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- German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU) [0325442D]
- EC [283501]
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We report on the development and application of p- and n-type hydrogenated microcrystalline silicon oxide (mu c-SiOx:H) alloys in tandem thin film silicon solar cells. Our results show that the optical, electrical, and structural properties of mu c-SiOx:H can be conveniently tuned over a wide range to fulfil the requirements for solar cell applications. We have shown that adding of PH3 gas during deposition tends to increase crystallinity of mu c-SiOx:H layers, while additional trimethylboron (TMB) tends to suppress crystalline growth. When applied in tandem solar cells, both p-and n-type mu c-SiOx:H lead to a remarkable increase in the top cell current. Taking advantage of low refractive index and high optical band gap of mu c-SiOx:H allows the achievement of high efficiencies of 13.1% (initial) and 11.8% (stabilized).
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