Journal
NANOSCALE
Volume 8, Issue 21, Pages 11084-11090Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nr01092j
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Funding
- Basic Research Program of China [2013CB328705]
- National Natural Science Foundation of China [11574248, 61275034, 61106123]
- Ph.D. Programs Foundation of Ministry of Education of China [20130201110065]
- International Cooperation by Shaanxi [2015KW-008]
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Although organometal halide perovskite materials have shown great potential in light-emitting diodes, their performance is greatly restricted by the poor morphology of the perovskite layer. In this work, we demonstrate a facile one-step solution method to improve the perovskite film morphology via a non-solvent/solvent mixture. An efficient CH3NH3PbBr3-based light-emitting diode was prepared with a chlorobenzene/N,N-dimethylformamide mixed solvent. A high efficiency of 0.54 cd A(-1) is demonstrated, which is 22 times higher than that of a device fabricated by a traditional one-step solution process. Furthermore, the uniformity of the emission region and the device stability are strongly improved by this facile one-step solution process. Our work paves a new way for the morphological control of perovskite films for application in light-emitting diodes.
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