Effective control of crystal grain size in CH3NH3PbI3 perovskite solar cells with a pseudohalide Pb(SCN)2 additive

Mi Kyung Kim; Taewoo Jeon; Hyung Il Park; Ju Min Lee; Soo Ah Nam; Sang Ouk Kim

doi:10.1039/C6CE00842A

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Effective control of crystal grain size in CH₃NH₃PbI₃ perovskite solar cells with a pseudohalide Pb(SCN)₂ additive†

Mi Kyung Kim,^a Taewoo Jeon,^a Hyung Il Park,^a Ju Min Lee,^a Soo Ah Nam^a and Sang Ouk Kim*^a

Author affiliations

* Corresponding authors

^a National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST, Daejeon, Republic of Korea
E-mail: sangouk.kim@kaist.ac.kr

Abstract

We demonstrate effective morphology control of a CH₃NH₃PbI₃ perovskite film with a lead(II) thiocyanate additive. The perovskite crystal size is remarkably enlarged from the nanometer to the micrometer scale with only 3% Pb(SCN)₂ in solid perovskite films. Large-sized perovskite crystals enable effective enhancement of the carrier lifetime, which eventually leads to the overall improvement of the device performance of perovskite solar cells.

This article is part of the themed collection: Crystal engineering of composite materials

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Article information

DOI: https://doi.org/10.1039/C6CE00842A
Article type: Paper
Submitted: 13 Apr 2016
Accepted: 04 Jul 2016
First published: 04 Jul 2016

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CrystEngComm, 2016,18, 6090-6095

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Effective control of crystal grain size in CH₃NH₃PbI₃ perovskite solar cells with a pseudohalide Pb(SCN)₂ additive

M. K. Kim, T. Jeon, H. I. Park, J. M. Lee, S. A. Nam and S. O. Kim, CrystEngComm, 2016, 18, 6090 DOI: 10.1039/C6CE00842A

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