To improve the stability of CsPbBr nanocrystals (NCs), triple protection strategies were performed to obtain the ultra-stable films, including fluorinated hydrophobic film surface, polymer coating and silica encapsulation. CsPbBr QDs@SiO nanoparticles (SiPNCs) were prepared with well-dispersed NCs (8 nm) within acrylate-modified silica-shell. Polymer@SiPNCs (poly@SiPNCs) films were prepared by copolymerization of methyl methacrylate (MMA), 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoroheptyl methacrylate (DFHM) and SiPNCs under ultraviolet (UV) light. Compared to CsPbBr NCs solution, SiPNCs solution had well maintained light absorption and emission wavelengths of ∼509 nm and ∼522 nm respectively. High SiPNCs content resulted in enhanced micro/nano structure and increased roughness on the surface of poly@SiPNCs film. With increasing SiPNCs content, water contact angles (WCAs) of poly@SiPNCs films reached 126 ± 2.4°, 137.3 ± 1.3° and 141.5 ± 1.9° respectively. This fabricated poly@SiPNCs film exhibited much improved stabilities to water and UV light, even after 90 days of water immersion and 120 h of UV irradiation. White light-emitting-diode (LED) device emitted bright pure white light. This work will boost a large-scale preparation of stable QDs films as backlight display.

中文翻译：

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用于背光显示器的超稳定发光 CsPbBr3 NCs-丙烯酸酯薄膜的三重钝化策略

为了提高CsPbBr纳米晶（NCs）的稳定性，采用三重保护策略以获得超稳定薄膜，包括氟化疏水膜表面、聚合物涂层和二氧化硅封装。 CsPbBr QDs@SiO 纳米粒子 (SiPNCs) 是用丙烯酸酯改性二氧化硅壳内分散良好的 NCs (8 nm) 制备的。以甲基丙烯酸甲酯(MMA)、2,2,3,3,4,4,5,5,6,6,7,7-甲基丙烯酸十二氟庚酯(DFHM)和甲基丙烯酸十二氟庚酯(DFHM)共聚制备聚合物@SiPNCs(poly@SiPNCs)薄膜。紫外 (UV) 光下的 SiPNC。与CsPbBr NCs溶液相比，SiPNCs溶液很好地保持了光吸收和发射波长分别为~509 nm和~522 nm。高SiPNCs含量导致poly@SiPNCs薄膜表面微纳结构增强并增加粗糙度。随着SiPNCs含量的增加，poly@SiPNCs薄膜的水接触角（WCA）分别达到126±2.4°、137.3±1.3°和141.5±1.9°。即使经过 90 天的水浸泡和 120 小时的紫外线照射，这种制造的 Poly@SiPNCs 薄膜对水和紫外线的稳定性也大大提高。白色发光二极管（LED）装置发出明亮的纯白光。这项工作将促进大规模制备稳定的量子点薄膜作为背光显示。