All-inorganic CsPbX3 (X=Cl, Br, I) perovskite quantum dots (QDs) have garnered extensive attention due to excellent optical properties. However, practical applications have been hampered by their instability. Dense amorphous glass protected CsPbX3 perovskite QDs with excellent long-term stability are ideal conditions for developing high-quality liquid crystal displays (LCD). In this paper, CsPbBrI2 QDs are precipitated in a novel aluminosilicate glass matrix. This work shows that the network structure of aluminosilicate glass is “modified” by Li2O. As the Li2O content increases, the glass network structure can be connected into a more aggregation state. This modification of Li2O increased the photoluminescence quantum yield (PLQY) of CsPbBrI2@glass (CPBI@G) from 22 % to 86 %. Surprisingly, CPBI@G exhibits excellent long-term stability against water, heat, and light. The specially designed CsPbX3@glass@PET light conversion film achieves a wide-color-gamut of 123.7 % of the NTSC 1953 standard. The film displays colors richer than commercial displays, paving the way for the commercial use of the CPBI@G nanocomposite in backlight displays.

中文翻译：

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高发光和长期稳定性：CsPbBrI2@glass Li2O 优化，可实现高质量背光显示


全无机 CsPbX3 （X=Cl， Br， I） 钙钛矿量子点 （QD） 因其优异的光学性能而受到广泛关注。然而，实际应用因其不稳定性而受到阻碍。具有出色长期稳定性的致密非晶玻璃保护 CsPbX3 钙钛矿量子点是开发高质量液晶显示器 （LCD） 的理想条件。在本文中，CsPbBrI2 QDs 沉淀在一种新型铝硅酸盐玻璃基体中。这项工作表明，铝硅酸盐玻璃的网络结构被 Li2O “修饰”。随着 Li2O 含量的增加，玻璃网络结构可以连接到更多的聚集状态。Li2O 的这种改性将 CsPbBrI2@glass （CPBI@G） 的光致发光量子产率 （PLQY） 从 22 % 提高到 86 %。令人惊讶的是，CPBI@G 表现出优异的耐水、耐热和耐光的长期稳定性。专门设计的CsPbX3@glass@PET光转换胶片实现了 NTSC 1953 标准 123.7% 的宽色域。该薄膜显示的色彩比商用显示器更丰富，为CPBI@G纳米复合材料在背光显示器中的商业应用铺平了道路。