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 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | 2000930 |
Journal / Publication | Advanced Science |
Volume | 7 |
Issue number | 15 |
Online published | 17 Jun 2020 |
Publication status | Published - 5 Aug 2020 |
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DOI | DOI |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85086506470&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(67f17672-9cb7-4eac-8716-412cb2947002).html |
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 et al.
In: Advanced Science, Vol. 7, No. 15, 2000930, 05.08.2020.
In: Advanced Science, Vol. 7, No. 15, 2000930, 05.08.2020.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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