Stable CsPbBr3 perovskite quantum dots with high fluorescence quantum yields
| Autor: | Zhiliang Chen, Zhi-Quan Tian, Min Zhang, He He, Dai-Wen Pang, Dong-Liang Zhu, Guo Sanwei |
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| Rok vydání: | 2018 |
| Předmět: |
Photoluminescence
02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Delocalized electron Crystallinity chemistry Nanocrystal Oleylamine Chemical physics Quantum dot Triethoxysilane Materials Chemistry 0210 nano-technology Perovskite (structure) |
| Zdroj: | New Journal of Chemistry. 42:9496-9500 |
| ISSN: | 1369-9261 1144-0546 |
| DOI: | 10.1039/c8nj01191e |
| Popis: | All-inorganic CsPbX3 (X = I, Br, Cl) perovskite nanocrystals have emerged as a new class of optoelectronic material with tunable emission wavelengths, narrow full-width at half-maximum (FWHM) and high photoluminescence quantum yields (PLQYs) (≥50% in general). However, the instability caused by high delocalization of surface ions is still the major issue that obstructs their application. The type of surface ligands plays a key role in the stability of perovskite nanocrystals. In this work, stable cubic Br-rich CsPbBr3 quantum dots (QDs) with uniform particle sizes, high quantum yields and high crystallinity were obtained by a one-step hot-injection synthesis method. Oleylamine (OM) as one of the ligands in the classic synthesis method was replaced with (3-aminopropyl)triethoxysilane (APTES). The stability of the CsPbBr3 QDs was significantly improved under different testing conditions. |
| Databáze: | OpenAIRE |
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