Photon-Induced Reversible Phase Transition in CsPbBr3 Perovskite
Photon-Induced Reversible Phase Transition in CsPbBr3 Perovskite
复制标题
CsPbBr3 钙钛矿中的光子诱导可逆相变
DOI：
10.1002/adfm.201807922
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发表时间：
2019-03-28
影响因子：
19
通讯作者：
Zeng, Haibo
中科院分区：
文献类型：
--
作者：
Xue, Jie;Yang, Dandan;Zeng, Haibo
钙钛矿材料中的结构重组由于其在光电子器件中的辅助吸引力而备受关注，例如在光伏器件中实现连续波激光和性能的提高。不幸的是，控制重组过程的困难和不清楚的潜在机制阻碍了利用结构重组来追求钙钛矿型器件的独特功能。在本工作中，首次报道了CsPbBr3中利用带隙以上的小能量阈值(1.6 mW cm(-2))引发从正交相到四方相的相变。这种光子诱导的结构重组是可逆的，并提供了快速和可控的响应(
Structure reorganization within perovskite materials has attracted much attention due to its assisted appealing features in optoelectronic devices, such as achieving continue-wave laser and performance enhancement in photovoltaic devices. Unfortunately, the difficulty of controlling reorganization processing and unclear underlying mechanisms impose an impediment for taking advantage of the structural reorganization in pursuit of distinctive functions in perovskite-based devices. In this work, using above-bandgap illumination with a small energy threshold (1.6 mW cm(-2)) triggering phase transition from orthorhombic to tetragonal in CsPbBr3 is first reported. This photon-induced structure reorganization is reversible and presents a fast and controllable response (