All inorganic perovskite quantum dots (PQDs) and perovskite CsPbX₃/SiO₂ nanocomposites (PNCs) have shown their potentials for optical and lighting applications. We demonstrate a one-step approach to synthesize PQDs and PNCs more simply and effectively at room temperature in the open air. The resulting PNCs can show a narrow emission in the PL spectra and high stability under ambient conditions. In particular, both green CsPbBr₃/SiO₂ and red CsPbI_3-xBr_x/SiO₂ PNCs can be obtained by employing this easy and low-cost method. Even, the SiO₂ protection can also effectively prevent the halide exchange reaction between green and red PNCs, meaning the capability for white light applications. The resulting white light-emitting diodes (WLEDs) based on the green and red PNCs coated on the blue LED have a white Commission Internationale del’ Enclairage (CIE) coordinates of (0.375, 0.362) and a low correlated color temperature (CCT) of 4054 K.

所有无机钙钛矿量子点 (PQD) 和钙钛矿 CsPbX ₃ /SiO ₂纳米复合材料 ( PNC ) 都显示出其在光学和照明应用中的潜力。我们展示了一种在室温下露天更简单有效地合成 PQD 和 PNC 的一步方法。由此产生的 PNC 可以在 PL 光谱中显示出窄发射，并且在环境条件下具有高稳定性。特别是，绿色CsPbBr ₃ /SiO ₂和红色CsPbI _3-x Br _x /SiO ₂ PNCs都可以通过采用这种简单且低成本的方法获得。甚至，SiO ₂保护还可以有效防止绿色和红色 PNC 之间的卤化物交换反应，这意味着白光应用的能力。基于涂覆在蓝色 LED 上的绿色和红色 PNC 的所得白色发光二极管 (WLED) 的白色委员会 (CIE) 坐标为 (0.375, 0.362) 和低相关色温 (CCT) 为4054 K。