Synthesis of Lead-free CsGeI3 Perovskite Colloidal Nanocrystals and Electron Beam-induced Transformations

Wu, Xiaotong1,2; Song, Weidong1; Li, Qian1; Zhao, Xixia1; He, Dongsheng3; Quan, Zewei1

2018-07-04

10.1002/asia.201800573

Chemistry-An Asian Journal   影响因子和分区

1861-4728

1861-471X

Colloidal nanocrystals (NCs) of metal halide perovskite have recently aroused great research interest, due to their remarkable optical and electronic properties. We report a solution synthesis of a new member in this category, that is, all-inorganic lead-free cesium germanium iodine (CsGeI3) perovskite NCs. These CsGeI3 colloidal NCs are confirmed to adopt a rhombohedral structure. Moreover, the electron beam-induced transformations of these lead-free perovskite NCs have been investigated for the first time. The fracture of single-crystalline CsGeI3 nanocubes occurs first, followed by the emergence and growth of cesium iodine (CsI) single crystals and the final fragmentation into small debris with random orientations. Notably, the electron-reduced Ge species in CsGeI3 nanocubes exhibit a distinctive transformation path, compared to heavier Pb atoms in lead halide perovskite NCs.

electron beam irradiation germanium lead-free perovskites nanocrystals stability

SCI ; EI

英语

第一 ; 通讯

Shenzhen Science and Technology Innovation Committee[JCYJ20170412152528921] ; Shenzhen Science and Technology Innovation Committee[JCYJ20160530190842589]

Chemistry

Chemistry, Multidisciplinary

WOS:000437673100002

WILEY-V C H VERLAG GMBH

20182305272497

Cesium ; Cesium iodide ; Convergence of numerical methods ; Electron beams ; Electronic properties ; Electrons ; Germanium ; Iodine ; Metal halides ; Nanocrystals ; Perovskite ; Single crystals

Minerals:482.2 ; Alkali Metals:549.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Chemical Products Generally:804 ; Numerical Methods:921.6 ; Crystalline Solids:933.1

Web of Science

1.Southern Univ Sci & Technol, SUSTech, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
2.Peking Univ, Shenzhen Grad Sch, Sch Chem Biol & Biotechnol, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, SUSTech, Mat Characterizat & Preparat Ctr, Shenzhen 518055, Guangdong, Peoples R China

Wu, Xiaotong,Song, Weidong,Li, Qian,et al. Synthesis of Lead-free CsGeI3 Perovskite Colloidal Nanocrystals and Electron Beam-induced Transformations[J]. Chemistry-An Asian Journal,2018,13(13):1654-1659.

Wu, Xiaotong,Song, Weidong,Li, Qian,Zhao, Xixia,He, Dongsheng,&Quan, Zewei.(2018).Synthesis of Lead-free CsGeI3 Perovskite Colloidal Nanocrystals and Electron Beam-induced Transformations.Chemistry-An Asian Journal,13(13),1654-1659.

Wu, Xiaotong,et al."Synthesis of Lead-free CsGeI3 Perovskite Colloidal Nanocrystals and Electron Beam-induced Transformations".Chemistry-An Asian Journal 13.13(2018):1654-1659.