Li Yang, Liu Shangpu, Feeney Thomas, Roger Julie, Gholipoor Mohammad, Hu Hang, Zhao Dewei, Howard Ian, Deschler Felix, Lemmer Uli, Paetzold Ulrich W
College of Materials Science and Engineering & Engineering Research Center of Alternative Energy Materials and Devices, Ministry of Education, Sichuan University, Chengdu, 610065, China.
Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
Small. 2025 Apr;21(13):e2411935. doi: 10.1002/smll.202411935. Epub 2025 Feb 24.
Metal halide perovskites hold promise for nonepitaxial laser diodes, yet, continuous-wave (CW) optically pumped (photonic) lasing in CsPbBr remains elusive despite its superior thermal- and photo-stability among the perovskite family. This work reports on CsPbBr vertical cavity surface emitting lasers with low lasing thresholds (1.3 µJ cm ) at nanosecond pumping and remarkable lasing stability. Furthermore, the electrically switchable gain is achieved in CsPbBr electrically assisted optically pumped laser (EAOPL) devices by leveraging ion migration. Applying a small positive DC voltage to the EAOPL device significantly reduces the lasing threshold under nanosecond laser excitation and enhances the cavity mode intensity at CW laser excitation. These findings present a novel strategy, combining a small DC voltage with an electrical pulse, for exploring electrical injection lasing in CsPbBr perovskites.
金属卤化物钙钛矿有望用于非外延激光二极管，然而，尽管CsPbBr在钙钛矿家族中具有优异的热稳定性和光稳定性，但连续波（CW）光泵浦（光子）激光在CsPbBr中仍难以实现。这项工作报道了具有低激光阈值（1.3 μJ cm）的CsPbBr垂直腔面发射激光器，在纳秒泵浦下具有显著的激光稳定性。此外，通过利用离子迁移，在CsPbBr电辅助光泵浦激光器（EAOPL）器件中实现了电可切换增益。在EAOPL器件上施加一个小的正直流电压，可显著降低纳秒激光激发下的激光阈值，并增强连续波光激发下的腔模强度。这些发现提出了一种将小直流电压与电脉冲相结合的新策略，用于探索CsPbBr钙钛矿中的电注入激光。
