High cyan-emissive CsPbCl1.5Br1.5 quantum dots borosilicate glass modified by SrO

Currently, it has been found that white light emitting diode (WLED) lack cyan light, which not only hinders high-color-quality lighting applications but also results in an excess of blue light in WLED. In this work, cyan-emissive CsPbCl 1.5 Br 1.5 quantum dots (QDs) were synthesized in a borosilicate glass matrix using a high-temperature melting method. The findings suggest that the increasing SrO leads to a looser glass network, which in turn intensifies phase separation, promotes the crystallization of QDs and enhances the intensity of cyan PL. Significantly, after a heating-cooling cycle, the cyan-emissive glass sample still retained 97 % of its initial PL, suggesting that the synthesized sample exhibited good thermal stability. Finally, the prepared cyan-emissive QDs glass was incorporated into a WLED, effectively fills the lack of cyan light in 470–500 nm, showed a color rendering index (CRI) of 78 at a correlated color temperature (CCT) of 8300 K. This study provides an effective and convenient approach to enhancing the cyan luminescence performance of QDs, highlighting the significant application potential of cyan-emissive QDs glass in optoelectronic devices.