Solution-processed halide perovskite microcavity exciton-polariton light-emitting diodes working at room temperature  

作　　者：TIANYU LIU PENG RAN YIRONG SU ZENG CHEN RENCHEN LAI WEIDONG SHEN YAOGUANG MA HAIMING ZHU YANG(MICHAEL)YANG 

机构地区：[1]State Key Laboratory of Modern Optical Instrumentation,Institute for Advanced Photonics,College of Optical Science and Engineering,Zhejiang University,Hangzhou 310027,China [2]State Key Laboratory of Modern Optical Instrumentation,Key Laboratory of Excited State Materials of Zhejiang Province,Department of Chemistry,Zhejiang University,Hangzhou 310027,China [3]Instrumentation and Service Center for Molecular Sciences,Westlake University,Hangzhou 310024,China

出　　处：《Photonics Research》2023年第10期1791-1801,共11页光子学研究（英文版）

基　　金：National Key Research and Development Program of China (2017YFA0207700);Outstanding Youth Fund of Zhejiang Natural Science Foundation(LR18F050001);National Natural Science Foundation of China (61804134, 61874096, 62074136)。

摘　　要：Exciton-polaritons offer the potential to achieve electrically pumped perovskite polariton lasers with much lower current thresholds than conventional photonic lasers. While optically pumped exciton-polaritons have been widely studied in halide perovskites, electrically-pumped polaritons remain limited. In this study, we demonstrate the use of a solution-processing strategy to develop halide perovskite polariton light-emitting diodes(LEDs) that operate at room temperature. The strong coupling of excitons and cavity photons is confirmed through the dispersion relation from angle-resolved reflectivity, with a Rabi splitting energy of 64 meV. Our devices exhibit angle-resolved electroluminescence following the low polariton branch and achieve external quantum efficiencies of 1.7%, 3.85%, and 3.7% for detunings of 1.1,-77, and-128 meV, respectively. We also explore devices with higher efficiency of 5.37% and a narrower spectral bandwidth of 6.5 nm through the optimization of a top emitting electrode. Our work demonstrates, to our knowledge, the first room-temperature perovskite polariton LED with a typical vertical geometry and represents a significant step towards realizing electrically pumped perovskite polariton lasers.

关 键 词：pumped DIODES tuning 

分 类 号：TN312.8[电子电信—物理电子学]