Supplementary Material.docx

Here, Gd-doped CsPbCl1.5Br1.5 nanocrystals (NCs) in borosilicate glass matrix (B2O3-SiO2-ZnO) were prepared by melting quenching and in-situ crystallization. The optical performance of CsPbCl1.5Br1.5 NCs@glasses under different heat-treated temperatures and the content of Gd3+ were analyzed in detail. After CsPbCl1.5Br1.5 NCs@glass is doped with Gd3+ ions, the PL intensity increases and the synthesized Gd-doped CsPbCl1.5Br1.5 NCs@glasses have excellent water stability and thermal cycling performance. In addition, the influence of Gd-doped concentrations and heat-treated temperatures on the amplified spontaneous emission (ASE) thresholds of CsPbCl1.5Br1.5 NCs@glasses was studied, and the Gd-doped CsPbCl1.5Br1.5 NCs@glasses achieve controllable ASE thresholds at room temperature. The ASE threshold can be as low as 0.39 mJ/cm2. This work offers a neoteric reference for the research in the application of metal ions-doped perovskites NCs and a new idea for the realization of a controllable and low ASE thresholds on perovskites NCs.