Efficient heat dissipation perovskite lasers using a high-thermal-conductivity diamond substrate
Guohui Li, Zhen Hou, Yanfu Wei, Ruofan Zhao, Ting Ji, Wenyan Wang, Rong Wen, Kaibo Zheng, Shengwang Yu, Yanxia Cui
Abstract
Abstract Efficient heat dissipation that can minimize temperature increases in device is critical in realizing electrical injection lasers. High-thermal-conductivity diamonds are promising for overcoming heat dissipation limitations for perovskite lasers. In this study, we demonstrate a perovskite nanoplatelet laser on a diamond substrate that can efficiently dissipate heat generated during optical pumping. Tight optical confinement is also realized by introducing a thin SiO 2 gap layer between nanoplatelets and the diamond substrate. The demonstrated laser features a Q factor of ∼1962, a lasing threshold of 52.19 µJ cm −2 , and a low pump-density-dependent temperature sensitivity (∼0.56 ± 0.01 K cm 2 µJ −1 ) through the incorporation of the diamond substrate. We believe our study could inspire the development of electrically driven perovskite lasers.