Research on the photoluminescence properties of Cu2+-doped perovskite CsPbCl3 quantum dots. Issue 15 (24th February 2021)

• Record Type: Journal Article
• Authors: Wu, Ronghua; Bai, Zhongchen; Jiang, Jinguo; Yao, Heng; Qin, Shuijie
• Is Part Of: RSC advances. Volume 11:Issue 15(2021)
• Page Start: 8430
• Page End: 8436
• Publication Date: 2021-02-24
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra09043c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Schematic of the synthesis of Cu:CsPbCl3 QDs and PL spectra. Abstract : CsPbX3 (X = Cl, Br, and I) quantum dots (QDs) and Cu 2+ -doped CsPbCl3 QDs with different Cu-to-Pb molar ratios were synthesized via a solvent-based thermal synthesis method. The photoluminescence (PL) properties of these Cu 2+ -doped CsPbCl3 QDs were also investigated in this study. The results showed that with the increase in the Cl − concentration the surface defects of CsPb(Cl/Br)3 QDs increased, which resulted in an increase in the non-radiative recombination of excitons and weakened the PL intensity. Moreover, Cu 2+ -doped CsPbCl3 QDs maintained the cubic crystal structure of the initial phases. Owing to the doping of Cu 2+ ions, the surface defects of CsPbCl3 QDs were effectively eliminated, which facilitated the excitonic recombination via a radiative pathway. The PL quantum yields (PLQYs) of Cu 2+ -doped CsPbCl3 QDs were increased to 51%, showing great photostability. From the results, it is believed that Cu:CsPbCl3 QDs can be widely used in optoelectronic devices.