期刊
ACS APPLIED NANO MATERIALS
卷 5, 期 9, 页码 12552-12561出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c02244
关键词
photoluminescence; CsPbI3; nanoplatelets; white-emitting diodes; morphology
资金
- National Natural Science Foundation of China, China [51972145]
- Independent Innovation Team from Ji Nan Science & Technology Bureau, China [2019GXRC016, 2021GXRC109]
- University of Jinan, China [XKY2118]
This study developed a solvothermal method to fabricate CsPbI3 perovskite nanomaterials with governable morphologies and dimensions. By adjusting the precursor solutions and reaction temperature, the photoluminescence of the samples could be tuned. Sodium dodecyl benzene sulfonate was used as an additive to improve the stability of the prepared samples.
Red-emitting CsPbI3 perovskite materials are still limited in various commercial applications because of their stability being related to the morphology and dimension. In this paper, a solvothermal method was developed to fabricate CsPbI3 perovskite nanomaterials with governable morphologies (e.g., nanoplatelets (NPLs) to nanocubes (NCs)) and dimensions ranging from the zero-dimensional (0D) Cs4PbI6 to the three-dimensional (3D) CsPbI3. By adjusting the amount of Cs precursor solutions, the photoluminescence (PL) peak position of the samples was tuned over the whole red-emitting region (from 607 to 700 nm). In addition, the reaction temperature affected the PL properties of the samples and demonstrated that temperature was critical to control the performance of CsPbI3 perovskite materials. Furthermore, sodium dodecyl benzene sulfonate (SDBS) was chosen as the additive to improve the stability of the prepared samples. The result provided an approach to get CsPbI3 perovskite nanocrystals with stabile PL. Finally, CsPbI3 NPLs embedded in the polystyrene film displayed bright and stable white light emission.
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