Preprint Article Version 1 This version is not peer-reviewed

Greatly Enhanced Photovoltaic Performance of Crystalline Silicon Solar Cells Using Metal Oxide Layers by Band-Gap Alignment Engineering

Version 1 : Received: 25 April 2018 / Approved: 27 April 2018 / Online: 27 April 2018 (07:51:02 CEST)
Version 2 : Received: 27 April 2018 / Approved: 27 April 2018 / Online: 27 April 2018 (09:46:15 CEST)

How to cite: Zhou, L.; Xiao, L.; Yang, H.; Liu, J.; Yu, X. Greatly Enhanced Photovoltaic Performance of Crystalline Silicon Solar Cells Using Metal Oxide Layers by Band-Gap Alignment Engineering. Preprints 2018, 2018040353 (doi: 10.20944/preprints201804.0353.v1). Zhou, L.; Xiao, L.; Yang, H.; Liu, J.; Yu, X. Greatly Enhanced Photovoltaic Performance of Crystalline Silicon Solar Cells Using Metal Oxide Layers by Band-Gap Alignment Engineering. Preprints 2018, 2018040353 (doi: 10.20944/preprints201804.0353.v1).

Abstract

Band-gap alignment engineering has now been extensively studied due to its high potential application. Here we demonstrate a simple route to synthesize two metal oxide layers and align them together according to their bandgaps on surface of crystalline silicon(c-Si) solar cells. The metal oxide layers can not only extend absorption spectrum to generate extra carriers but also serve to separate electron-hole pairs more efficiently. As a consequence, the photovoltaic performance of SnO2/CdO /Si double-layer solar cell (DLSC) is highly improved compared to CdO/Si and SnO2/Si single-layer solar cells(SLSCs) and SnO2/CdO/Si double-layer solar cell(DLSC). By the alignment engineering, the SnO2/CdO/Si DLSC produces a short circuit photocurrent (Jsc) of 38.20 mA/cm2, an open circuit photovoltage (Voc) of 0.575 V and a fill factor (FF) of 68.7%, corresponding to a light to electric power conversion efficiency (η) of 15.09% under AM1.5 illumination. These results suggest that with the use of metal oxide layers by band-gap alignment engineering, new avenues have been opened for developing high-efficiency and cost-effective c-Si solar cells.

Subject Areas

silicon solar cells; semiconductors; electron-hole pairs

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