Fecha de publicación: 21/10/2024 Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE Cu: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. Through visual recognition technology, the information writing and output of Cu:CsPbCl1.5Br1.5 QDs CFs have been achieved, and the preliminary application of blue light QDs in the field of optoelectronics has been realized. Based on these results, it is believed that Cu:CsPbCl1.5Br1.5 QDs have promising applications in optoelectronic devices in the future.


Abstract
Cu: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.