Electron-beam irradiation-hard metal-halide perovskite nanocrystals. Issue 18 (16th April 2019)

• Record Type: Journal Article
• Authors: Liu, Wenna; Zheng, Jinju; Shang, Minghui; Fang, Zhi; Chou, Kuo-Chih; Yang, Weiyou; Hou, Xinmei; Wu, Tom
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 18(2019)
• Page Start: 10912
• Page End: 10917
• Publication Date: 2019-04-16
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta01898k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Electron-beam irradiation-hard perovskite nanocrystals based on a doping strategy are reported. Abstract : Recently, regardless of numerous works reporting on the instability of metal-halide perovskites against humidity/oxygen/heat, another intrinsic weakness under high-energy electron-beam (e-beam) irradiation has emerged. Here, e-beam irradiation-hard perovskite nanocrystals (NCs) are reported, which are based on a doping strategy. The lifetime of Mn 2+ -doped perovskite NCs under e-beam irradiation at a high acceleration voltage of 200 keV is 10-fold prolonged, in comparison to that of their undoped counterpart. It is discovered that the stronger Mn–Cl and Pb–Cl bonds triggered by Mn 2+ doping provide an enhanced chemical stability to the perovskite NCs. Furthermore, the enlarged tolerance factor of the NCs with Mn 2+ dopants improves the phase stability of the perovskites. Consequently, both enhanced chemical and phase stabilities offer a more negative formation energy for perovskite NCs with fundamentally increased stability under e-beam irradiation. The present work offers a new route towards irradiation-hard perovskite nanomaterials.