Journal
NEW JOURNAL OF CHEMISTRY
Volume 42, Issue 12, Pages 9496-9500Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nj01191e
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Funding
- National Natural Science Foundation of China [21535005, 21375100]
- 111 Project [111-2-10]
- Collaborative Innovation Centre for Chemistry and Molecular Medicine
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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.
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