Extrinsic Green Photoluminescence from the Edges of 2D Cesium Lead Halides

• Published in: Advanced materials (Weinheim) Vol. 31; no. 33; pp. e1902492 - n/a
• Main Authors: Wang, Chong, Wang, Yanan, Su, Xinghua, Hadjiev, Viktor G., Dai, Shenyu, Qin, Zhaojun, Calderon Benavides, Hector A., Ni, Yizhou, Li, Qiang, Jian, Jie, Alam, Md. Kamrul, Wang, Haiyan, Robles Hernandez, Francisco C., Yao, Yan, Chen, Shuo, Yu, Qingkai, Feng, Guoying, Wang, Zhiming, Bao, Jiming
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 01.08.2019; Wiley Blackwell (John Wiley & Sons)
• Subjects: 2D perovskites; Br vacancies; Cesium; CsPbBr3 nanocrystals; Density functional theory; Diamond anvil cells; edge emission; Emission spectra; Energy gap; Halides; Hydrostatic pressure; Ion exchange; Lead compounds; Materials science; Metal halides; Nanocrystals; Optoelectronic devices; Photoluminescence; Point defects; Pressure dependence; Br vacancies; CsPbBr3 nanocrystals; edge emission; 2D perovskites

Since the first report of the green emission of 2D all‐inorganic CsPb2Br5, its bandgap and photoluminescence (PL) origin have generated intense debate and remained controversial. After the discovery that PL centers occupy only specific morphological structures in CsPb2Br5, a two‐step highly sensitiv...