Department of Physics
The effect of morphology control on the performance of inorganic cesium lead halide based green perovskite light-emitting diodes (PeLEDs) was analyzed. The PeLEDs were prepared using two different formulation approaches: (1) the solution was prepared by dissolving CsPbBr3 powders in dimethyl sulfoxide (DMSO), and (2) the precursor solution was formulated by dissolving CsBr and PbBr2 powders with different molar ratios of CsBr to PbBr2 in DMSO. The peak luminance of 4590 cd/m2 was obtained for PeLEDs made with CsPbBr3-solution, which is 48 and 12 times higher than that of the optimized PeLEDs fabricated using CsBr/PbBr2 precursor solutions with different molar ratios of CsBr to PbBr2 of 2:1 and 1:1. Our results reveal that the morphology and control of excess Pb atoms in the perovskite emitting layer play the important role in modulating the current losses and radiative decay rate, which were optimized in this work for attaining efficient operation of the PeLEDs.
Source Publication Title
Journal of Materials Chemistry C
Royal Society of Chemistry
This journal is © The Royal Society of Chemistry 2018
This work was supported by the National Natural Science Foundation of China (Grants. 61604149, 61376062, 61376022, 61575192 and 61504145); The Science and Technology Development Plan of Jilin Province (20170520130JH and 20140101094JC); The Project of Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices (KJS1615). Hong Kong Baptist University Faculty Research Grant (FRG2/2016-17/088); Interinstitutional Collaborative Research Scheme (RC-ICRS/15-16/04); and Shenzhen Peacock Plan (KQTD20140630110339343).
Link to Publisher's Edition
Jin, F., Zhao, B., Chu, B., Zhao, H., Su, Z., Li, W., & Zhu, F. (2018). Morphology control towards bright and stable inorganic halide perovskite light-emitting diodes. Journal of Materials Chemistry C (6), 1573-1578. https://doi.org/10.1039/C7TC04631F
Available for download on Friday, March 01, 2019
Additional FilesJA-5052-29474_suppl.pdf (375 kB)