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Proceedings Paper

Effect of ZnO surface defects on efficiency and stability of ZnO-based perovskite solar cells
Author(s): Fangzhou Liu; Man Kwong Wong; Ho Won Tam; Aleksandra B. Djurišić; Alan M. C. Ng; Wai Kin Chan
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Paper Abstract

ZnO as an alternative electron transport layer (ETL) material for perovskite solar cell applications has drawn increasing research interest due to its comparable energy levels to TiO2, relatively high electron mobility, as well as its feasibility to be processed at low temperatures for potential applications in flexible devices. Nevertheless, ZnO based perovskite devices usually exhibit inferior performance and severe stability drawbacks which are related to the surface defects of ZnO ETL. In this study, to investigate the correlation between ZnO defect composition and resulting device performance, different approaches of preparing ZnO ETL are compared in terms of the perovskite morphology and device performance. In addition, direct manipulations of ZnO surface defects are performed by various surface treatments, and the photovoltaic performance of devices with ZnO ETL subjected to different surface treatments is compared. Surface modification of ZnO ETL by ethanolamine (EA) is demonstrated to efficiently enhance the photovoltaic performance of resulting ZnO based devices.

Paper Details

Date Published: 24 February 2017
PDF: 9 pages
Proc. SPIE 10105, Oxide-based Materials and Devices VIII, 101051F (24 February 2017); doi: 10.1117/12.2251885
Show Author Affiliations
Fangzhou Liu, The Univ. of Hong Kong (Hong Kong, China)
Man Kwong Wong, The Univ. of Hong Kong (Hong Kong, China)
Ho Won Tam, The Univ. of Hong Kong (Hong Kong, China)
Aleksandra B. Djurišić, The Univ. of Hong Kong (Hong Kong, China)
Alan M. C. Ng, South Univ. of Science and Technology of China (China)
Wai Kin Chan, The Univ. of Hong Kong (Hong Kong, China)

Published in SPIE Proceedings Vol. 10105:
Oxide-based Materials and Devices VIII
Ferechteh H. Teherani; David C. Look; David J. Rogers, Editor(s)

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