Zhang Haihua, Wu Yishi, Liao Qing, Zhang Zhaoyi, Liu Yanping, Gao Qinggang, Liu Peng, Li Meili, Yao Jiannian, Fu Hongbing
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P. R. China.
Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Angew Chem Int Ed Engl. 2018 Jun 25;57(26):7748-7752. doi: 10.1002/anie.201802515. Epub 2018 May 25.
Miniaturized nanowire nanolasers of 3D perovskites feature a high gain coefficient; however, room-temperature optical gain and nanowire lasers from 2D layered perovskites have not been reported to date. A biomimetic approach is presented to construct an artificial ligh-harvesting system in mixed multiple quantum wells (QWs) of 2D-RPPs of (BA) (FA) Pb Br , achieving room-temperature ASE and nanowire (NW) lasing. Owing to the improvement of flexible and deformable characteristics provided by organic BA cation layers, high-density large-area NW laser arrays were fabricated with high photostability. Well-controlled dimensions and uniform geometries enabled 2D-RPPs NWs functioning as high-quality Fabry-Perot (FP) lasers with almost identical optical modes, high quality (Q) factor (ca. 1800), and similarly low lasing thresholds.
三维钙钛矿的小型化纳米线纳米激光器具有高增益系数；然而，二维层状钙钛矿的室温光学增益和纳米线激光器迄今尚未见报道。本文提出了一种仿生方法，在(BA)(FA)PbBr的二维- RPPs混合多量子阱(QWs)中构建人工光捕获系统，实现室温受激发射放大(ASE)和纳米线(NW)激光发射。由于有机BA阳离子层提供的柔性和可变形特性的改善，制备了具有高光稳定性的高密度大面积NW激光阵列。尺寸的良好控制和均匀的几何形状使二维- RPPs NWs能够作为高质量的法布里-珀罗(FP)激光器工作，具有几乎相同的光学模式、高品质因数(Q)(约1800)和相似的低激射阈值。
