Efficient Planar Heterojunction Perovskite Solar Cells with Li-doped Compact TiO₂ Layer

Authors

Detao Liu, University of Electronic Science and Technology of China, China
Shibin Li, University of Electronic Science and Technology of China, China
Peng Zhang, University of Electronic Science and Technology of China, China
Yafei Wang, University of Electronic Science and Technology of China, China
Rui Zhang, University of Electronic Science and Technology of China, China
Hojjatollah Sarvari, University of KentuckyFollow
Feng Wang, University of Kentucky
Jiang Wu, University College London, UK
Zhiming Wang, University of Electronic Science and Technology of China, China
Zhi Chen, University of KentuckyFollow

Abstract

Perovskite solar cells (PSCs) have been developed rapidly in recent time, and efficient planar PSCs are regarded as the most promising alternative to the Si solar cells. In this study, we demonstrated that Li-doping of compact TiO₂ can reduce the density of electron traps and increase the conductivity of the electron transport layer (ETL) of PSCs. Due to the improved electronic property of ETL, the Li-doped compact TiO₂ based planar heterojunction PSCs exhibit negligible hysteretic J-V behavior. Comparing with the undoped compact TiO₂ based PSCs, the power conversion efficiency (PCE) of the Li-doped compact TiO₂ film based PSCs is improved from 14.2% to 17.1%. Fabrication of highly efficient planar PSCs provides a pathway for commercialization of PSCs.

Document Type

Article

Publication Date

1-2017

Notes/Citation Information

Published in Nano Energy, v. 31, p. 462-468.

© 2016 Elsevier Ltd. All rights reserved.

This manuscript version is made available under the CC‐BY‐NC‐ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/.

The document available for download is the author's post-peer-review final draft of the article.

Digital Object Identifier (DOI)

https://doi.org/10.1016/j.nanoen.2016.11.028

Funding Information

This work was supported by National Natural Science Foundation of China under Grant Nos.61474016 and 61405026, 61371046, 61421002, 6157031208, 61471085, and National Higher-education Institution General Research and Development Fund (ZYGX2014J044), Projects of International Cooperation of Sichuan Province (No.2014HH0041).

Repository Citation

Liu, Detao; Li, Shibin; Zhang, Peng; Wang, Yafei; Zhang, Rui; Sarvari, Hojjatollah; Wang, Feng; Wu, Jiang; Wang, Zhiming; and Chen, Zhi, "Efficient Planar Heterojunction Perovskite Solar Cells with Li-doped Compact TiO₂ Layer" (2017). Electrical and Computer Engineering Faculty Publications. 30.
https://uknowledge.uky.edu/ece_facpub/30