| 题目： | Reduced Confinement Effect by Isocyanate Passivation for Efficient Sky-Blue Perovskite Light-Emitting Diodes |
作者： | Yu Xia1, Yan-Hui Lou2,*, Yu-Hang Zhou1, Yi-Ran Shi1, Kai-Li Wang1, Lei Cai3, Chun-Hao Chen1, Fan Hu1, Zhao-Kui Wang1,* and Liang-Sheng Liao1 |
单位： | 1Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China. 2College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, China. 3School of Physics and Electronics, Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, Shandong Normal University, Jinan 250014, China |
Compared with green and red perovskite light-emitting diodes (PeLEDs), the development of blue PeLEDs has been lagging due to high defect density and inferior carrier transport. Herein, a novel defect-passivation strategy is proposed to fabricate efficient sky-blue PeLEDs by using isocyanate molecules. This strategy not only significantly reduces the nonradiative recombination loss caused by defects but also improves the injection and transport capacities of carriers by reducing the confinement effect. Benefiting from the passivation engineering and the reduction of confinement effect, the prepared sky-blue PeLEDs present a significantly improved external quantum efficiency of 12.5% at 489 nm, which is 1.5 times higher than that of the control device. Meanwhile, the universality of isocyanate-based passivators to improve the performance of PeLEDs is also demonstrated. The finding of this study provides a new reference for the selection of novel passivation agents to construct highly efficient blue PeLEDs. | |
影响因子： | 18.808 |
分区情况： | 一区 |
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责任编辑：郭佳