期刊
NATURE COMMUNICATIONS
卷 8, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/ncomms15882
关键词
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资金
- Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [2015M3D1A1068061]
- Nano . Material Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [2012M3A7B4034985]
- National Research Foundation of Korea (NRF) - Korean government (MIST) [2014R1A2A1A10050257]
We report a facile roll-printing method, geometrically confined lateral crystal growth, for the fabrication of large-scale, single-crystal CH3NH3PbI3 perovskite thin films. Geometrically confined lateral crystal growth is based on transfer of a perovskite ink solution via a patterned rolling mould to a heated substrate, where the solution crystallizes instantly with the immediate evaporation of the solvent. The striking feature of this method is that the instant crystallization of the feeding solution under geometrical confinement leads to the unidirectional lateral growth of single-crystal perovskites. Here, we fabricated single-crystal perovskites in the form of a patterned thin film (3 x 3 inch) with a high carrier mobility of 45.64 cm(2) V-1 s(-1). We also used these single-crystal perovskite thin films to construct solar cells with a lateral configuration. Their active-area power conversion efficiency shows a highest value of 4.83%, which exceeds the literature efficiency values of lateral perovskite solar cells.
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