The long-term stability issue of metal halide perovskite nanocrystals (NCs) is one of the challenges for applications in optoelectronic devices. Herein, we demonstrate the enhanced air, moisture, and light stability of these NCs by encapsulation in UV resin (UVR). As-prepared perovskite NCs-UVR composites exhibit well maintained optical properties. In addition, the composites show excellent stability with almost identical luminescent behavior for more than 60 days upon continuous exposure in air, moisture, and light irradiation, which is superior to the other previous reports. Moreover, we have used these green- and red-emitting composite sheets to fabricate white light-emitting diodes (LEDs) by stacking them on top of the blue LED. We observed a bright neutral white light with a correlated-color temperature of 5623 K, a color-rendering index of 85, and a high luminous efficacy of radiation (∼349 lm/W). Our findings show the great potential of employing this technique for diverse photonic applications.

中文翻译：

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UV树脂增强了用于白色发光二极管的金属卤化物钙钛矿纳米晶体的稳定性。

金属卤化物钙钛矿纳米晶体（NCs）的长期稳定性问题是光电子设备中应用的挑战之一。本文中，我们通过封装在UV树脂（UVR）中证明了这些NC增强了空气，水分和光稳定性。制备的钙钛矿NCs-UVR复合材料表现出良好的光学性能。此外，在连续暴露于空气，湿气和光照射下超过60天后，该复合材料还具有出色的稳定性和几乎相同的发光性能，这优于其他先前的报道。此外，我们已经使用了这些发射绿色和红色的复合片材，通过将它们堆叠在蓝色LED的顶部来制造白色发光二极管（LED）。我们观察到明亮的中性白光，相关色温为5623 K，显色指数为85，辐射的发光效率高（约349 lm / W）。我们的发现表明，将该技术用于多种光子应用具有巨大的潜力。