Affiliation:
1. State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment and the Guangdong Provincial Key Laboratory of Micro‐Nano Manufacturing Technology and Equipment Guangdong University of Technology Guangzhou China
2. School of Light Industry and Chemical Engineering Guangdong University of Technology Guangzhou China
3. Nanofiber Research and Development Department Guangdong Hope Hai Demolding New Material Technology Co, Ltd Jangmen China
Abstract
AbstractCu:CsPbClxBr3‐x quantum dots (QDs) with different Cu‐to‐Pb molar ratios were synthesized via a solvent‐based thermal synthesis method, and highly stable blue‐light PCL@Cu:CsPbClxBr3‐x composite fibers (CFs) were prepared by electrohydrodynamic (EHD) technology. The photoluminescence (PL) properties of these Cu2+‐doped Cu:CsPbClxBr3‐x QDs and the stability of polymer encapsulation were investigated in this study. The results showed that with increasing Cu2+ concentration, the CsPbCl1.5Br1.5 QDs maintained their initial cubic crystal structure. The doping of Cu2+ ions effectively eliminated the surface defects of CsPbCl1.5Br1.5 QDs, facilitating excitonic recombination through radiative pathways. The PL quantum yield (PLQY) of Cu:CsPbCl1.5Br1.5 QDs increased to 85%. In addition, The fiber encapsulation method effectively improved the stability of the Cu:CsPbCl1.5Br1.5 QDs, After 3 days in water, the fluorescence intensity still remains at the initial 90%. Based on these results, it is believed that Cu:CsPbCl1.5Br1.5 QDs have promising applications in optoelectronic devices in the future.
Funder
Natural Science Foundation of Guangdong Province