{"title":"Ultra-Stable and Bright Pure-Red Perovskite Nanocrystals for Backlit Displays","authors":"Yuze Zhang, Zhenwei Ren, Hengfei Shi, Zhiyong Zheng, Xin Zhou, Chengzhao Luo, Huifeng Ji, Hua Chen, Yanyan Wang, Yu Chen","doi":"10.1002/adom.202401042","DOIUrl":null,"url":null,"abstract":"<p>Metal halide perovskite nanocrystals (NCs) have emerged as an alternative to conventional phosphors for wide color gamut displays. However, the issues of poor stability and low emission efficiency of pure-red CsPbBr<sub>x</sub>I<sub>3-x</sub> NCs set an obstacle to their practical application. Herein, the synergistic effect of Mn doping and mesoporous SiO<sub>2</sub> sealing is reported through in situ formation of Mn-doped NCs into mesoporous SiO<sub>2</sub> nanospheres (MnNCs@SiO<sub>2</sub>) to structurally and spatially stabilize the perovskite NCs for bright and stable pure-red emitter. The large bonding energy of Mn-halogen effectively suppresses the halide vacancy defects, prompting the highest photoluminescence quantum yield (PLQY) up to 84% (634 nm) among the pure-red composite analogs. More importantly, the nanocrystal structure stability is fundamentally improved by the enhanced formation energy with Mn doping, together with the spatial isolation by SiO<sub>2</sub> nanospheres. The MnNCs@SiO<sub>2</sub> films exhibit impressive stabilities against high-temperature heating, thermal cycle test, UV irradiation, water, and acid/alkali erosion, representing one of the most stable pure-red perovskite emitters. By integrating fabricated all-perovskite CsPbX3 single color conversion film into the liquid crystal display (LCD) modules, a wide color gamut of 128% of NTSC is achieved, enabling an excellent color rendition for high-saturation object colors toward practical applications.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"12 33","pages":""},"PeriodicalIF":8.0000,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Optical Materials","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/adom.202401042","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Metal halide perovskite nanocrystals (NCs) have emerged as an alternative to conventional phosphors for wide color gamut displays. However, the issues of poor stability and low emission efficiency of pure-red CsPbBrxI3-x NCs set an obstacle to their practical application. Herein, the synergistic effect of Mn doping and mesoporous SiO2 sealing is reported through in situ formation of Mn-doped NCs into mesoporous SiO2 nanospheres (MnNCs@SiO2) to structurally and spatially stabilize the perovskite NCs for bright and stable pure-red emitter. The large bonding energy of Mn-halogen effectively suppresses the halide vacancy defects, prompting the highest photoluminescence quantum yield (PLQY) up to 84% (634 nm) among the pure-red composite analogs. More importantly, the nanocrystal structure stability is fundamentally improved by the enhanced formation energy with Mn doping, together with the spatial isolation by SiO2 nanospheres. The MnNCs@SiO2 films exhibit impressive stabilities against high-temperature heating, thermal cycle test, UV irradiation, water, and acid/alkali erosion, representing one of the most stable pure-red perovskite emitters. By integrating fabricated all-perovskite CsPbX3 single color conversion film into the liquid crystal display (LCD) modules, a wide color gamut of 128% of NTSC is achieved, enabling an excellent color rendition for high-saturation object colors toward practical applications.
期刊介绍:
Advanced Optical Materials, part of the esteemed Advanced portfolio, is a unique materials science journal concentrating on all facets of light-matter interactions. For over a decade, it has been the preferred optical materials journal for significant discoveries in photonics, plasmonics, metamaterials, and more. The Advanced portfolio from Wiley is a collection of globally respected, high-impact journals that disseminate the best science from established and emerging researchers, aiding them in fulfilling their mission and amplifying the reach of their scientific discoveries.