Perovskite nanocrystals-in-glass hierarchical structures enable stable continuous-wave random lasers

作者：Xinkuo Li, Chenduan Chen, Ke Sun, Linhan Li, Zhu Xiao, Zhou Li, Yuanzheng Yue, Jianrong Qiu, Dezhi Tan · 发表于：Science Advances · 年份：2026 · DOI：10.1126/sciadv.adz8460 · 被引用次数：3 · 研究领域：Random lasers and scattering media、Perovskite Materials and Applications、Nonlinear Photonic Systems

Encapsulating perovskite nanocrystals (PNCs) in glass enables enhanced stability of PNCs and numerous applications such as random lasers. However, preparing PNCs and tuning their properties in glass is energy consuming because of high processing temperature and long processing time, and continuous-wave (CW) random lasers have not been achieved. Here, we report modulation of the structure, photoluminescence, and lasing properties of PNCs in glass at temperatures well below the glass transition temperature with a short processing period. We generate tunable PNCs in glass via nanophase separation and ion exchange in the perovskite domains. PNCs-in-glass hierarchical structures are created by controlling nanophase separation and crystallization of PNCs. Substantially increased scattering in the hierarchical structures enables stable CW single-mode random lasing with an ultralow threshold of 52.6 milliwatts per square centimeter. We achieve flexible CW random lasers by incorporating hierarchical structures into the polydimethylsiloxane film. The random lasers are used in speckle-free laser imaging and dynamic holographic displays.