Full coverage all-inorganic cesium lead halide perovskite film for high-efficiency light-emitting diodes assisted by 1,3,5-tri(m-pyrid-3-yl-phenyl)benzene |
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| Affiliation: | 1. Department of Electrical & Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China;2. School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China;3. School of Science, Tianjin University, Tianjin 300072, China;4. Tianjin Zhonghuan Quantum Tech Co., Ltd. (ZH-Qtech), Tianjin 300358, China |
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| Abstract: | A full coverage all-inorganic cesium lead halide perovskite CsPbBr3 film is achieved by introducing a small organic molecule material, 1,3,5-tri(m-pyrid-3-yl-phenyl)benzene (TmPyPB), as a solution additive. The light-emitting diode (LED) using this CsPbBr3:TmPyPB perovskite film as light emitting layer exhibit improved electroluminescent (EL) performance with the maximum brightness of 22309 cd/m2, highest current efficiency of 8.77 cd/A, and external quantum efficiency (EQE) of 2.27%, which are 8.6, 10.2 and 10.3 times to that of neat CsPbBr3 film based LED, respectively. The enhanced EL performances are ascribed to less current leakage due to full coverage, and improved electron transporting in the CsPbBr3:TmPyPB perovskite film. |
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| Keywords: | Cesium lead halide perovskite TmPyPB Composite thin film Light-emitting diode |
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