Intercalation crystallization of phase-pure α-HC(NH2)2PbI3 upon microstructurally engineered PbI2 thin films for planar perovskite solar cells

Yuanyuan Zhou; Mengjin Yang; Joonsuh Kwun; Onkar S. Game; Yixin Zhao; Shuping Pang; Nitin P. Padture; Kai Zhu

doi:10.1039/C5NR06189J

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Intercalation crystallization of phase-pure α-HC(NH₂)₂PbI₃ upon microstructurally engineered PbI₂ thin films for planar perovskite solar cells†

Yuanyuan Zhou,‡^a Mengjin Yang,‡^b Joonsuh Kwun,^a Onkar S. Game,^a Yixin Zhao,^c Shuping Pang,^d Nitin P. Padture*^a and Kai Zhu*^b

Author affiliations

* Corresponding authors

^a School of Engineering, Brown University, Providence, RI 02912, USA
E-mail: nitin_padture@brown.edu

^b Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401, USA
E-mail: kai.zhu@nrel.gov

^c School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China

^d Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, P.R. China

Abstract

The microstructure of the solid-PbI₂ precursor thin film plays an important role in the intercalation crystallization of the formamidinium lead triiodide perovskite (α-HC(NH₂)₂PbI₃). It is shown that microstructurally engineered PbI₂ thin films with porosity and low crystallinity are the most favorable for conversion into uniform-coverage, phase-pure α-HC(NH₂)₂PbI₃ perovskite thin films. Planar perovskite solar cells fabricated using these thin films deliver power conversion efficiency (PCE) up to 13.8%.

This article is part of the themed collection: Perovskites at the nanoscale: from fundamentals to applications

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Article information

DOI: https://doi.org/10.1039/C5NR06189J
Article type: Communication
Submitted: 09 sep. 2015
Accepted: 26 okt. 2015
First published: 28 okt. 2015

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Nanoscale, 2016,8, 6265-6270

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Intercalation crystallization of phase-pure α-HC(NH₂)₂PbI₃ upon microstructurally engineered PbI₂ thin films for planar perovskite solar cells

Y. Zhou, M. Yang, J. Kwun, O. S. Game, Y. Zhao, S. Pang, N. P. Padture and K. Zhu, Nanoscale, 2016, 8, 6265 DOI: 10.1039/C5NR06189J

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