In situsynthesis of high-efficiency CsPbBr3/CsPb2Br5composite nanocrystals in aqueous solution of microemulsion

作者：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^*

来源：Green Chemistry, 2020, 22(16): 5257-5261.

DOI：10.1039/d0gc02059a

• HALIDE PEROVSKITE NANOCRYSTALS
• LIGHT-EMITTING-DIODES
• ANION-EXCHANGE
• CSPBX3
• BR
• CL

Here, we present the microemulsion method using sodium dodecylbenzenesulfonate and hydrofluoric acid for thein situsynthesis of brightly luminescent CsPbBr3/CsPb(2)Br(5)composite nanocrystals (NCs) in aqueous solution. The obtained CsPbBr3/CsPb(2)Br(5)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/CsPb(2)Br(5)composite NCs and red-emitting K2SiF6: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, andin situwater-phase route to synthesize high-quality cesium lead halide NCs for their practical applications in solid-state back-lighting devices.

• 单位
  湖南农业大学; 中山大学; 厦门大学