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Issue 24, 2016
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Charge carrier loss mechanisms in CuInS2/ZnO nanocrystal solar cells

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Abstract

Heterojunction solar cells based on colloidal nanocrystals (NCs) have shown remarkable improvements in performance in the last decade, but this progress is limited to merely two materials, PbS and PbSe. However, solar cells based on other material systems such as copper-based compounds show lower power conversion efficiencies and much less effort has been made to develop a better understanding of factors limiting their performance. Here, we study charge carrier loss mechanisms in solution-processed CuInS2/ZnO NC solar cells by combining steady-state measurements with transient photocurrent and photovoltage measurements. We demonstrate the presence of an extraction barrier at the CuInS2/ZnO interface, which can be reduced upon illumination with UV light. However, trap-assisted recombination in the CuInS2 layer is shown to be the dominant decay process in these devices.

Graphical abstract: Charge carrier loss mechanisms in CuInS2/ZnO nanocrystal solar cells

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Supplementary files

Article information


Submitted
15 Feb 2016
Accepted
13 May 2016
First published
20 May 2016

This article is Open Access

Phys. Chem. Chem. Phys., 2016,18, 16258-16265
Article type
Paper

Charge carrier loss mechanisms in CuInS2/ZnO nanocrystal solar cells

D. Scheunemann, S. Wilken, J. Parisi and H. Borchert, Phys. Chem. Chem. Phys., 2016, 18, 16258
DOI: 10.1039/C6CP01015F

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    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
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    [Original citation] - Published by The Royal Society of Chemistry.

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