In situ growth of CsPbX3 (X = Cl, Br, I) perovskite quantum dots (PeQDs) in inorganic glass can address their stability issue for wide‐color‐gamut full‐color backlit displays. However, most of the reported CsPbX3 precipitated in glass are limited by low absorption and low external quantum efficiency (EQE). This work demonstrates that CaO additive can adjust the polymerization of borosilicate glass network, and promote the precipitation of whole‐family CsPbX3 PeQDs in glass with a record absorption efficiency above 75%. As a result, the as‐prepared green and red CsPbX3@glass (X3 = Br3, Br1I2) exhibit high EQEs of 75% and 67%, and can pass harsh stability tests after immersing water, irradiating by intensive blue light and experiencing 85 °C/85%RH aging over 1000 h owing to effective protection of PeQDs from external environment with the help of robust glass matrix. As a proof of concept, a white backlit module is fabricated by coupling a single‐layer yellow PeQDs enhanced film (PQDF) with blue light guide panel, and the designed prototype display device with wide color gamut of 115% of the NTSC 1953 exhibits a more realistic and vivid color images. This work will pave the way for the realization of commercial application of ultra‐stable CsPbX3@glass in QD‐backlight displays.

中文翻译：

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CsPbX3@Glass （X = Cl， Br， I） 纳米复合材料，全系列高吸收效率超过 75%，用于背光显示器


CsPbX3 （X = Cl， Br， I） 钙钛矿量子点 （PeQD） 在无机玻璃中的原位生长可以解决它们在宽色域全彩背光显示器中的稳定性问题。然而，大多数报道的玻璃中沉淀的 CsPbX3 都受到低吸收和低外部量子效率 （EQE） 的限制。本工作表明，CaO 添加剂可以调节硼硅酸盐玻璃网络的聚合，促进玻璃中全家族 CsPbX3 PeQDs 的沉淀，吸收效率超过 75%，创纪录的 75% 以上。因此，制备的绿光和红光CsPbX3@glass （X3 = Br3， Br1I2） 表现出 75% 和 67% 的高 EQE，并且在浸水中、强蓝光照射和在 1000 小时内经历 85 °C/85%RH 老化后可以通过苛刻的稳定性测试，这是由于在坚固的玻璃基质的帮助下有效地保护了 PeQD 免受外部环境的影响。作为概念验证，通过将单层黄色 PeQDs 增强薄膜 （PQDF） 与蓝光导板耦合来制造白色背光模块，设计了具有 NTSC 1953 115% 广色域的原型显示器件，呈现出更逼真、更生动的彩色图像。这项工作将为实现超稳定CsPbX3@glass在 QD 背光显示器中的商业应用铺平道路。