In situ synthesis of high-efficiency CsPbBr3/CsPb2Br5 composite nanocrystals in aqueous solution of microemulsion. Issue 16 (6th August 2020)

• Record Type: Journal Article
• Authors: Lou, Sunqi; Zhou, Zhi; Gan, Weijiang; Xuan, Tongtong; Bao, Zhen; Si, Shuaichen; Cao, Luyu; Li, Huili; Xia, Zhiguo; Qiu, Jianbei; Liu, Ru-Shi; Wang, Jing
• Is Part Of: Green chemistry. Volume 22:Issue 16(2020)
• Page Start: 5257
• Page End: 5261
• Publication Date: 2020-08-06
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/d0gc02059a
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : An innovative microemulsion method was reported for the preparation of CsPbBr3 /CsPb2 Br5 composite NCs in water. Abstract : Here, we present the microemulsion method using sodium dodecylbenzenesulfonate and hydrofluoric acid for the in situ synthesis of brightly luminescent CsPbBr3 /CsPb2 Br5 composite nanocrystals (NCs) in aqueous solution. The obtained CsPbBr3 /CsPb2 Br5 composite NCs exhibit a photoluminescence quantum yield of 77.0% and a full width at half maximum of 16.0 nm. And solid-state back-lighting devices were fabricated by combining CsPbBr3 /CsPb2 Br5 composite NCs and red-emitting K2 SiF6 :Mn 4+ phosphors with blue light. The as-fabricated device exhibits a wide color gamut of about 95.8% of the Rec. 2020. This work provides a green, low-cost, and in situ water-phase route to synthesize high-quality cesium lead halide NCs for their practical applications in solid-state back-lighting devices.