Abstract Metal-halide perovskites have been hailed as remarkable materials for photovoltaic devices and, recently, their star has also been on the rise in optoelectronics and photonics. Nevertheless, challenging issues, such as the thermal/chemical stability and high-performance devices with long-term stability, limit their practical applications. Here, we successfully prepared CsPbBr 3 NCs incorporated into mesoporous silica (NCs-MS) by a simple stirred of MS with CsPbBr 3 NCs blended in toluene solution. The resultant NCs-MS nanocomposite exhibit excellent optical performance and good thermal and photostability under illumination of UV light for 120 h. Additionally, NCs-MS nanocomposite is resistant to water, which are beneficial for the fabrication of white light-emitting diode (WLED) devices. Thereby a WLED was constructed by combining NCs-MS nanocomposite with Sr 2 Si 5 N 8 :Eu 2+ red phosphor on an InGaN blue chip, achieving a highly efficient luminous efficacy of 47.6 lm/W. Moreover, the WLED also demonstrate wonderful color stability under 120 mA current. This work opens up the exciting opportunity of using all-inorganic CsPbBr 3 NCs-MS nanocomposite for high performance and low-cost WLEDs applications.

中文翻译：

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在介孔二氧化硅纳米粒子中具有亮绿色发光 CsPbBr 3 钙钛矿纳米晶体的高效白光 LED

摘要 金属卤化物钙钛矿被誉为光伏器件的卓越材料，最近，它们的明星也在光电子学和光子学领域崭露头角。然而，具有挑战性的问题，例如热/化学稳定性和具有长期稳定性的高性能设备，限制了它们的实际应用。在这里，我们通过简单搅拌 MS 与 CsPbBr 3 NCs 混合在甲苯溶液中，成功地制备了 CsPbBr 3 NCs 并入介孔二氧化硅 (NCs-MS)。所得的 NCs-MS 纳米复合材料在紫外光照射 120 小时下表现出优异的光学性能和良好的热稳定性和光稳定性。此外，NCs-MS 纳米复合材料具有防水性，这有利于白光发光二极管 (WLED) 器件的制造。因此，通过在 InGaN 蓝色芯片上将 NCs-MS 纳米复合材料与 Sr 2 Si 5 N 8 :Eu 2+ 红色荧光粉相结合，构建了 WLED，实现了 47.6 lm/W 的高效发光效率。此外，WLED 在 120 mA 电流下也表现出出色的色彩稳定性。这项工作为将全无机 CsPbBr 3 NCs-MS 纳米复合材料用于高性能和低成本 WLED 应用开辟了令人兴奋的机会。