期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 34, 页码 11349-11357出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc02118d
关键词
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资金
- National Natural Science Foundation of China [NSFC] [62074044, 61904036, 61675049]
- Zhongshan - Fudan Joint Innovation Center and Jihua Laboratory Projects of Guangdong Province [X190111UZ190]
- Natural Science Foundation of China [62004231, 61935017]
- Science and Technology Development Fund, Macao SAR [FDCT-0044/2020/A1, FDCT-091/2017/A2, FDCT-014/2017/AMJ]
- UM [MYRG2018-00148-IAPME]
- Natural Science Foundation of Guangdong Province, China [2019A1515012186]
- Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials [2019B121205002]
Novel homostructured CsPbBr3-CsPbBr3 nanocrystals with superior stability and green emission were successfully synthesized via a thioacetamide-oleylamine ligand system, offering a promising approach to enhance the stability of halide perovskite nanocrystals for future optoelectronic applications.
Cesium lead halide perovskite nanocrystals (NCs) have compelling photoelectric properties while their poor stability severely impedes their practical applications. Herein, we demonstrate novel CsPbBr3-CsPbBr3 homostructured NCs induced by a thioacetamide-oleylamine (TAA-OAm) ligand system via a facile room temperature re-precipitation method. The TAA-OAm ligand system could form long-chain N-substituted thioamides and short-chain S2- ligands, resulting in two different growth rates of CsPbBr3 NCs and finally forming CsPbBr3-CsPbBr3 homostructured NCs. The performed structural and compositional characterizations corroborate the existence of CsPbBr3-CsPbBr3 homostructured NCs. The obtained CsPbBr3-CsPbBr3 homostructures exhibit green emission of 510 nm and superior stability at room temperature in air. Our study provides a new approach to improve the stability of halide perovskite NCs, which may pave the way for future optoelectronic applications.
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