@article{64a17c8ad0934022a26d81af557a3b3d,
title = "Phase Engineering of Cesium Manganese Bromides Nanocrystals with Color-Tunable Emission",
abstract = "For display applications, it is highly desirable to obtain tunable red/green/blue emission. However, lead-free perovskite nanocrystals (NCs) generally exhibit broadband emission with poor color purity. Herein, we developed a unique phase transition strategy to engineer the emission color of lead-free cesium manganese bromides NCs and we can achieve a tunable red/green/blue emission with high color purity in these NCs. Such phase transition can be triggered by isopropanol: from one dimensional (1D) CsMnBr3 NCs (red-color emission) to zero dimensional (0D) Cs3MnBr5 NCs (green-color emission). Furthermore, in a humid environment both 1D CsMnBr3 NCs and 0D Cs3MnBr5 NCs can be transformed into 0D Cs2MnBr4⋅2 H2O NCs (blue-color emission). Cs2MnBr4⋅2 H2O NCs could inversely transform into the mixture of CsMnBr3 and Cs3MnBr5 phase during the thermal annealing dehydration step. Our work highlights the tunable optical properties in single component NCs via phase engineering and provides a new avenue for future endeavors in light-emitting devices.",
keywords = "cesium manganese bromides, color-tunable emission, lead-free perovskite, nanocrystals",
author = "Qingkun Kong and Bin Yang and Junsheng Chen and Ruiling Zhang and Siping Liu and Daoyuan Zheng and Hongling Zhang and Qingtong Liu and Yiying Wang and Keli Han",
note = "Funding Information: This work was supported by the National Key Research and Development Program of China (grant 2017YFA0204800), the National Natural Science Foundation of China (Grant Nos. 21833009, 22088102, 21525315, 22005295), DICP I202017, the Scientific Instrument Developing Project of the Chinese Academy of Sciences (Grant No. YJKYYQ20190003), Liao Ning Revitalization Talents Program (XLYC1802126), the Dalian City Foundation for Science and Technology Innovation (2019J12GX031). This work is supported by the Project funded by China Postdoctoral Science Foundation (2020M682159). B. Yang acknowledges the funding support from the Youth Innovation Promotion Association CAS (2021183). We would like to thank Xiaoju Li and Haiyan Sui from Shandong University Core Facilities for Life and Environmental Sciences for their help with the TEM. Funding Information: This work was supported by the National Key Research and Development Program of China (grant 2017YFA0204800), the National Natural Science Foundation of China (Grant Nos. 21833009, 22088102, 21525315, 22005295), DICP I202017, the Scientific Instrument Developing Project of the Chinese Academy of Sciences (Grant No. YJKYYQ20190003), Liao Ning Revitalization Talents Program (XLYC1802126), the Dalian City Foundation for Science and Technology Innovation (2019J12GX031). This work is supported by the Project funded by China Postdoctoral Science Foundation (2020M682159). B. Yang acknowledges the funding support from the Youth Innovation Promotion Association CAS (2021183). We would like to thank Xiaoju Li and Haiyan Sui from Shandong University Core Facilities for Life and Environmental Sciences for their help with the TEM. Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",
year = "2021",
doi = "10.1002/anie.202105413",
language = "English",
volume = "60",
pages = "19653--19659",
journal = "Angewandte Chemie International Edition",
issn = "1433-7851",
publisher = "Wiley-VCH Verlag GmbH & Co. KGaA",
number = "36",
}