@article{Lou2018, 
author = {Yongbing Lou and Yandan Niu and Dongwen Yang and Qiaoling Xu and Yuhang Hu and Ying Shen and Jing Ming and Jinxi Chen and Lijun Zhang and Yixin Zhao},
title = {Rod-shaped thiocyanate-induced abnormal band gap broadening in SCN- doped CsPbBr3 perovskite nanocrystals},
year = {2018},
journal = {Nano Research},
volume = {11},
number = {5},
pages = {2715-2723},
keywords = {doping, perovskite nanocrystals, pseudohalide thiocyanate, cesium lead halide},
url = {https://www.sciopen.com/article/10.1007/s12274-017-1901-z},
doi = {10.1007/s12274-017-1901-z},
abstract = {In this work, the pseudohalide thiocyanate has been demonstrated as a promising alternative to the halide anion to engineer optoelectronic properties of inorganic/organic hybrid perovskites because it exhibits better chemical stability than the halide anion. Previous reports have suggested that the ionic radii and electronegativity of SCN- is close to that of I-; the SCN- doped CH3NH3PbI3 exhibited similar optical properties as pure CH3NH3PbI3. Consequently, it was expected that doping of CsPbBr3 perovskite with SCN- would result in band gap narrowing. Interestingly, the photoluminescent all-inorganic CsPbBr3 perovskite nanocrystals exhibit an abnormal blue shift in optical properties and improvement of the crystallinity when successfully doped by SCN-. Combined experimental and theoretical investigations revealed that doping of the CsPbBr3 perovskite with the rod-like SCN- anion introduced disorder in the crystal lattice, leading to its expansion, and impacted the electronic structure of the perovskite with band gap broadening.}
}