超短脉冲
重组
材料科学
放松(心理学)
光谱学
化学物理
半导体
光电子学
电子迁移率
化学
光学
物理
激光器
社会心理学
基因
量子力学
生物化学
心理学
作者
Chunhui Zhu,Tong Tong,Yujie Liu,Yafei Meng,Zhonghui Nie,Xuefeng Wang,Yongbing Xu,Yi Shi,Rong Zhang,Fengqiu Wang
摘要
Bi2O2Se is emerging as a high mobility functional material for optoelectronics, but its fundamental optical properties remain less well studied. Here, ultrafast photocarrier dynamics in single crystal Bi2O2Se is investigated by pump fluence-dependent, broadband ultrafast spectroscopy. Our results reveal that bimolecular recombination plays an important role in the photocarrier relaxation process, and a room-temperature bimolecular recombination constant of (1.29 ± 0.42) × 10−9 cm−3 s−1 is obtained for Bi2O2Se. Such a level of the recombination constant combined with a high mobility (∼1006 cm2 V−1 s−1 at 200 K for Bi2O2Se) suggests that Bi2O2Se can be a promising material for photovoltaic applications.
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