Nanocrystallization and optical properties of CsPbBr3?xIx perovskites in chalcogenide glasses |
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| Authors: | Nengbing Long Yanqing Fu Tianxiang Xu Dashuang Ding Shaoqian Zhang Shengzhi Sun Shiliang Kang Tiefeng Xu Shixun Dai Qiuhua Nie Changgui Lin |
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| Affiliation: | 1. Laboratory of Infrared Materials and Devices, Research Institute of Advanced Technologies, Ningbo University, Fenghua Road 818, Jiangbei District, Ningbo 315211, PR China;2. Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Fenghua Road 818, Jiangbei District, Ningbo 315211, PR China;3. Key Laboratory of Chemical Lasers, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China;4. Ningbo Institute of Oceanography, Ningbo 315832, PR China |
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| Abstract: | The confinement of CsPbX3 (X = Cl, Br, and I) perovskite nanocrystals (NCs) in a stabilized inorganic glass matrix is a new strategy for improving their long-term stability and promoting their applications in the optoelectronic field. Here, in situ nanocrystallization strategy is developed to precipitate CsPbBr3?xIx NCs with arbitrary I/Br ratio among an elaborately designed GeS2–Sb2S3-based chalcogenide glass matrix. Spherical CsPbBr3?xIx NCs are homogeneously distributed in the glass matrix after thermal treatment. The photoluminescence (PL) spectra show that the emission peaks of CsPbBr3?xIx NCs can be tuned from 570 nm to 722 nm with the replacement of Br by I. The fs transient absorption (TA) spectra reveal that there exists some structural defects in the NCs, leading to short PL decay life. This work would shed light on confining CsPbX3 NCs into glassy matrices, facilitating their future applications in photoelectronic fields. |
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| Keywords: | Crystallization Chalcogenide glass Glass–ceramic Perovskite nanocrystal |
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