Brightly luminescent and color-tunable green-violet-emitting halide perovskite CH3NH3PbBr3 colloidal quantum dots: an alternative to lighting and display technology. Issue 30 (19th July 2018)

• Record Type: Journal Article
• Authors: Liu, Yonghao; Xu, Quan; Chang, Shuai; Lv, Zhao; Huang, Sheng; Jiang, Feng; Zhang, Xin; Yang, Gaoling; Tong, Xin; Hao, Shujuan; Ren, Yandong
• Is Part Of: Physical chemistry chemical physics. Volume 20:Issue 30(2018)
• Page Start: 19950
• Page End: 19957
• Publication Date: 2018-07-19
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c8cp02776e
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Organic–inorganic hybrid perovskite (CH3 NH3 PbX3, X = Cl, Br, or I) quantum dots have become one of the most promising materials for optoelectronic applications. Abstract : Organic–inorganic hybrid perovskite (CH3 NH3 PbX3, X = Cl, Br, or I) quantum dots have become one of the most promising materials for optoelectronic applications. We controllably synthesized CH3 NH3 PbBr3 quantum dots with a tunable spectrum with the emission peaks covering the range from green (523.6 nm), blue and eventually to deep violet (409.4 nm), which is wider than that of quantum dots obtained without changing the halide component. The mechanism of the blueshift was investigated. The purified quantum dots have allowed the fabrication of efficient electroluminescence devices having a simple glass/ITO/PEDOT:PSS/TFB/CH3 NH3 PbBr3 quantum dot/TPBi/LiF/Al structure. CH3 NH3 PbBr3 quantum dots with 5–30 μL n -octylamine showed an ideal color-saturated green emission with Commission Internationale de l'Eclairage color coordinates of (0.123, 0.744) and a narrow full width at half-maximum of 19–24 nm. The photoluminescence quantum yield was up to 90.2%. In addition, it is also worth noting that the chromaticity coordinates ( x, y ) of CH3 NH3 PbBr3 quantum dots with 50–100 μL n -octylamine are (0.300, 0.344), (0.305, 0.314) and (0.323, 0.318) in the white region. All these properties indicate that these MAPbBr3 quantum dots can provide effective data support for the application of white LEDs, and may potentially be used as single-component multicolor-emitting materials, which can be applied to lighting and display technology.