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Potential development of all-inorganic perovskites

发布时间:2023-10-19点击次数:

  • 关键字:LIGHT-EMITTING-DIODES; HALIDE; CRYSTAL; CONDENSATION; ABSORPTION; LENGTHS
  • 摘要:Lead halide perovskites have emerged as excellent optical gain materials for solution-processable and flexible lasers. Recently, continuous-wave (CW) optically driven lasing was established in perovskite crystals; however, the mechanism of low-threshold operation is still disputed. In this study, CW-pumped lasing from one-dimensional CsPbBr3 nanoribbons (NBs) with a threshold of similar to 130 W cm(-2) is demonstrated, which can be ascribed to the large refractive index induced by the excitonpolariton (EP) effect. Increasing the temperature reduces the exciton fraction of EPs, which decreases the group and phase refractive indices and inhibits lasing above 100 K. Thermal management, including reducing the NB height to similar to 120 +/- 60 nm and adopting a high-thermal-conductivity sink, e.g., sapphire, is critical for CW-driven lasing, even at cryogenic temperatures. These results reveal the nature of ultralow-threshold lasing with CsPbBr3 and provide insights into the construction of room-temperature CW and electrically driven perovskite macro/microlasers.
  • 卷号:20
  • 期号:9
  • 是否译文:否
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论文成果

个人信息

  • 职称:教授
  • 学历:博士研究生
  • 学位:工学博士
  • 所在单位:化学与分子工程学院
  • 学科: 物理化学

学术荣誉:

  • 2019  当选: 省高端人才