Oriented Grains with Preferred Low-Angle Grain Boundaries in Halide Perovskite Films by Pressure-Induced Crystallization

Wanjung Kim, Myung Sun Jung, Seonhee Lee, Yung Ji Choi, Jung Kyu Kim, Sung Uk Chai, Wook Kim, Dae Geun Choi, Hyungju Ahn, Jeong Ho Cho, Dukhyun Choi, Hyunjung Shin, Dongho Kim, Jong Hyeok Park

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37 Citations (Scopus)

Abstract

A general methodology is reported to create organic–inorganic hybrid metal halide perovskite films with enlarged and preferred-orientation grains. Simply pressing polyurethane stamps with hexagonal nanodot arrays on partially dried perovskite intermediate films can cause pressure-induced perovskite crystallization. This pressure-induced crystallization allows to prepare highly efficient perovskite solar cells (PSCs) because the preferred-orientation and enlarged grains with low-angle grain boundaries in the perovskite films exhibit suppressed nonradiative recombination. Consequently, the photovoltaic response is dramatically improved by the uniaxial compression in both inverted-planar PSCs and normal PSCs, leading to power conversion efficiencies of 19.16%.

Original languageEnglish
Article number1702369
JournalAdvanced Energy Materials
Volume8
Issue number10
DOIs
Publication statusPublished - 2018 Apr 5

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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    Kim, W., Jung, M. S., Lee, S., Choi, Y. J., Kim, J. K., Chai, S. U., Kim, W., Choi, D. G., Ahn, H., Cho, J. H., Choi, D., Shin, H., Kim, D., & Park, J. H. (2018). Oriented Grains with Preferred Low-Angle Grain Boundaries in Halide Perovskite Films by Pressure-Induced Crystallization. Advanced Energy Materials, 8(10), [1702369]. https://doi.org/10.1002/aenm.201702369