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Issue 17, 2017, Issue in Progress
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High-quality CsPbBr3 perovskite nanocrystals for quantum dot light-emitting diodes

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Abstract

Metal halide perovskites, such as CsPbX3 (X = Cl, Br, and I), have gained extensive attention due to their increasing demand in optoelectronic applications such as solar cells and lighting-emitting devices. Herein, we report a versatile approach to synthesize high-quality CsPbBr3 perovskite nanocrystals (sized 5–15 nm) by ligand-assisted reprecipitation at room temperature. The monodispersed CsPbBr3 nanocube perovskites displayed relatively high photoluminescence quantum yields of 50–80%. By virtue of the quantum size effects, the bandgap energies were manipulated from blue to green spectral regions (410–530 nm). In addition, through compositional modulations of the anion exchange technique, the bright photoluminescence could be almost tuned over the entire visible spectral region (450–650 nm). Furthermore, the photoluminescence of the CsPbBr3 nanocrystals was characterized by narrow emission line widths of 15–50 nm and radiative lifetimes of 5–15 ns. Finally, by taking advantage of these outstanding merits, the CsPbBr3 perovskites were successfully utilized in the application of highly fluorescent patterning and color-purity light-emitting diodes.

Graphical abstract: High-quality CsPbBr3 perovskite nanocrystals for quantum dot light-emitting diodes

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Publication details

The article was received on 02 Dec 2016, accepted on 26 Dec 2016 and first published on 07 Feb 2017


Article type: Paper
DOI: 10.1039/C6RA27665B
Citation: RSC Adv., 2017,7, 10391-10396
  • Open access: Creative Commons BY-NC license
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    High-quality CsPbBr3 perovskite nanocrystals for quantum dot light-emitting diodes

    X. Du, G. Wu, J. Cheng, H. Dang, K. Ma, Y. Zhang, P. Tan and S. Chen, RSC Adv., 2017, 7, 10391
    DOI: 10.1039/C6RA27665B

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