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Open AccessArticle

Tungsten-Doped Zinc Oxide and Indium–Zinc Oxide Films as High-Performance Electron-Transport Layers in N–I–P Perovskite Solar Cells

1
Department of Materials Physics, Dong-A University, Busan 49315, Korea
2
Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Korea
3
Department of Chemistry, Kyung Hee University, Seoul 02447, Korea
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(4), 737; https://doi.org/10.3390/polym12040737 (registering DOI)
Received: 18 February 2020 / Revised: 23 March 2020 / Accepted: 24 March 2020 / Published: 26 March 2020
(This article belongs to the Special Issue Conjugated Oligomers and Polymer Nanomaterials)
Perovskite solar cells (PSCs) have attracted tremendous research attention due to their potential as a next-generation photovoltaic cell. Transition metal oxides in N–I–P structures have been widely used as electron-transporting materials but the need for a high-temperature sintering step is incompatible with flexible substrate materials and perovskite materials which cannot withstand elevated temperatures. In this work, novel metal oxides prepared by sputtering deposition were investigated as electron-transport layers in planar PSCs with the N–I–P structure. The incorporation of tungsten in the oxide layer led to a power conversion efficiency (PCE) increase from 8.23% to 16.05% due to the enhanced electron transfer and reduced back-recombination. Scanning electron microscope (SEM) images reveal that relatively large grain sizes in the perovskite phase with small grain boundaries were formed when the perovskite was deposited on tungsten-doped films. This study demonstrates that novel metal oxides can be used as in perovskite devices as electron transfer layers to improve the efficiency. View Full-Text
Keywords: transparent metal oxide; perovskite solar cell; tungsten-doped InZnO; zinc–oxynitride transparent metal oxide; perovskite solar cell; tungsten-doped InZnO; zinc–oxynitride
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MDPI and ACS Style

Kang, J.H.; Song, A.; Park, Y.J.; Seo, J.H.; Walker, B.; Chung, K.-B. Tungsten-Doped Zinc Oxide and Indium–Zinc Oxide Films as High-Performance Electron-Transport Layers in N–I–P Perovskite Solar Cells. Polymers 2020, 12, 737.

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