Cd-Rich Alloyed CsPb1-xCdxBr3 Perovskite Nanorods with Tunable Blue Emission and Fermi Levels Fabricated through Crystal Phase Engineering

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Jie Guo
  • Yuhao Fu
  • Min Lu
  • Xiaoyu Zhang
  • Stephen V. Kershaw
  • Jia Zhang
  • Shulin Luo
  • William W. Yu
  • Lijun Zhang
  • Xue Bai

Detail(s)

Original languageEnglish
Article number2000930
Journal / PublicationAdvanced Science
Volume7
Issue number15
Online published17 Jun 2020
Publication statusPublished - 5 Aug 2020

Link(s)

Abstract

One-dimensional semiconductor nanostructures have already been used for a variety of optoelectronic applications. Metal halide perovskites have emerged in recent years as promising high-performance optoelectronic materials, but reports on 1D nanorods (NRs) of all-inorganic halide perovskites are still scarce. This work demonstrates a synthetic strategy toward cesium-based inorganic perovskite NRs by exploiting composition-controlled crystal phase engineering. It is accomplished for Cd-rich mixed-cation CsPb1-xCdxBr3 nanocrystals, where the initial 1D hexagonal perovskite phase drives the growth of the 1D NRs, as supported by first-principles calculations. The band gaps of the resulting NRs are tunable by varying the Cd-content, and the highly uniform CsPb0.08Cd0.92Br3 NRs (with an average length of 84 nm and width of 16 nm) exhibit a true blue-color emission centered at 460 nm, with a high quantum yield of 48%. Moreover, this work also demonstrates the tunability of the Fermi levels in the films made of CsPb1-xCdxBr3 alloyed nanocrystals, where samples with highest Cd content show an increase of the electron concentration and a related increase in the conductivity.

Research Area(s)

  • alloyed perovskites, blue emission, crystal phase engineering, Fermi levels, nanorods

Citation Format(s)

Cd-Rich Alloyed CsPb1-xCdxBr3 Perovskite Nanorods with Tunable Blue Emission and Fermi Levels Fabricated through Crystal Phase Engineering. / Guo, Jie; Fu, Yuhao; Lu, Min; Zhang, Xiaoyu; Kershaw, Stephen V.; Zhang, Jia; Luo, Shulin; Li, Yanxiu; Yu, William W.; Rogach, Andrey L.; Zhang, Lijun; Bai, Xue.

In: Advanced Science, Vol. 7, No. 15, 2000930, 05.08.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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