光电子技术, 2018, 38 (4): 231, 网络出版: 2019-01-15
二维钙钛矿光电材料的光学性质
The Optical Properties of 2D Perovskites
摘要
相同的晶体结构导致二维和三维钙钛矿具有不同的光学性质。相对于三维钙钛矿材料, 在同等条件下, 二维钙钛矿稳定性显著提高。实验发现, 可通过将剥离晶体的二维钙钛矿无机层中八面体[MX6]4-层数(n)从5减小到1, 使能隙从1.85 eV单调增加到2.42 eV, 且二维有机无机杂化钙钛矿的瞬态光调制光谱可用来测量Rashba分裂。最后讨论了二维钙钛矿将来可能的研究方向。
Abstract
Different crystalline structures lead to different optical properties. 2D perovskites are more stable than 3D perovskites in the same experimental environment. It was experimentally discovered that, in the exfoliated crystals, decreasing n from 5 to 1 enabled band gap absorption and emission to increase monotonously from 1.85 eV to 2.42 eV. In addition, in the photo-modulation spectrum of 2D organic-inorganic halide perovskites, Rashba splitting could be measured. Finally, the potential future development of 2D perovskites was discussed.
张云雁. 二维钙钛矿光电材料的光学性质[J]. 光电子技术, 2018, 38(4): 231. ZHANG Yunyan. The Optical Properties of 2D Perovskites[J]. Optoelectronic Technology, 2018, 38(4): 231.