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Chen, Min; Zou, Yatao; Wu, Linzhong; Pan, Qi; Yang, Di; Hu, Huicheng; Tan, Yeshu; Zhong, Qixuan; Xu, Yong; Liu, Haiyu; Sun, Baoquan; Zhang, Qiao
Advanced functional materials, June 20, 2017, Letnik: 27, Številka: 23Journal Article
Recently, all‐inorganic cesium lead halide (CsPbX3, X = Cl, Br, I) perovskite nanocrystals have drawn much attention because of their outstanding photophysical properties and potential applications. In this work, a simple and efficient solvothermal approach to prepare CsPbX3 nanocrystals with tunable and bright photoluminescent (PL) properties, controllable composition, and morphology is presented. CsPbX3 nanocubes are successfully prepared with bright emission high PL quantum yield up to 80% covering the full visible range and narrow emission line widths (from 12 to 36 nm). More importantly, ultrathin CsPbX3 (X = Cl/Br, Br, and Br/I) nanowires (with diameter as small as ≈2.6 nm) can be prepared in a very high morphological yield (almost 100%). A strong quantum confinement effect is observed in the ultrathin nanowires, in which both the absorption and emission peaks shift to shorter wavelength range compared to their bulk bandgap. The reaction parameters, such as temperature and precursors, are varied to investigate the growth process. A white light‐emitting device prototype device with wide color gamut covering up to 120% of the National Television System Committee standard has been demonstrated by using CsPbBr3 nanocrystals as the green light source. The method in this study provides a simple and efficient way to prepare high‐quality CsPbX3 nanocrystals. A solvothermal method is developed to prepare high‐quality all‐inorganic cesium lead halide (CsPbX3) nanocrystals. Monodisperse CsPbX3 nanocubes and ultrathin CsPbX3 nanowires are prepared. By using the prepared CsPbBr3 nanocrystals as the green light source, a white light‐emitting prototype device with wide color gamut covering up to 120% of the National Television System Committee standard is fabricated.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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