Rapid large-scale synthesis of highly emissive solid-state metal halide perovskite quantum dots across the full visible spectrum. (November 2021)

• Record Type: Journal Article
• Authors: Chen, Zhihao; Mei, Shiliang; He, Haiyang; Wen, Zhuoqi; Cui, Zhongjie; Yang, Bobo; Yang, Dan; Zhang, Wanlu; Xie, Fengxian; Zou, Jun; Guo, Ruiqian
• Is Part Of: Optics & laser technology. Volume 143(2022)
• Publication Date: 2021-11
• Subjects: Perovskite quantum dots -- Solid powder -- Full visible spectrum -- White LED -- Wide color gamut; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2021.107369
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: Large-scale solid-state CsPbX3 PQDs have been successfully synthesized. High PLQY of 69.2% for CsPbBr3 QDs solids with high color purity of 90% were obtained. The colorful PQDs solids simply obtained via using alkali metal halide aqueous solution. The WLED displays high LE of 70.47 lm/W and wide color gamut about 130% NTSC value. Abstract: The practical applications of solid-state inorganic CsPbX3 perovskite quantum dots (PQDs) have been restricted by their poor stability. Herein, we report an efficient large-scale synthesis of solid-state CsPbX3 PQDs across the full visible spectra using 3-Aminopropyltrimethoxysilane as ligands at room temperature in open air. The obtained green CsPbBr3 solids display outstanding optical performance with high color purity of 90% and photoluminescence quantum yield of 69.2%. Thanks to the protection of silica coating, the solid-state product shows much higher thermal stability, photo stability and long-term stability than that of naked CsPbBr3 QDs. The blue CsPb(Br/Cl)3 and yellow or red CsPb(Br/I)3 PQDs solids can be simply obtained via using alkali metal halide aqueous solution as additives. The white LED fabricated by combining the obtained green CsPbBr3 QDs solid powders and commercial red K2 SiF6 : Mn 4+ phosphor with a blue LED chip displays high luminous efficiency of 70.47 lm/W and the color gamut can cover over 129.4% of the National Television System Committee standard.