Au-Seeded CsPbI3 Nanowire Optoelectronics via Exothermic Nucleation

You Meng; Yuxuan Zhang; Zhengxun Lai; Wei Wang; Weijun Wang; Yezhan Li; Dengji Li; Pengshan Xie; Di Yin; Dong Chen; Chuntai Liu; SenPo Yip; Johnny C. Ho

doi:10.1021/acs.nanolett.2c03612

Au-Seeded CsPbI₃Nanowire Optoelectronics via Exothermic Nucleation

You Meng, Yuxuan Zhang, Zhengxun Lai, Wei Wang, Weijun Wang, Yezhan Li, Dengji Li, Pengshan Xie, Di Yin, Dong Chen, Chuntai Liu, SenPo Yip, Johnny C. Ho^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

18 Citations (Scopus)

Abstract

Converting vapor precursors to solid nanostructures via a liquid noble-metal seed is a common vapor deposition principle. However, such a noble-metal-seeded process is excluded from the crystalline halide perovskite synthesis, mainly hindered by the growth mechanism shortness. Herein, powered by a spontaneous exothermic nucleation process (ΔH < 0), the Au-seeded CsPbI3 nanowires (NWs) growth is realized based on a vapor-liquid-solid (VLS) growth mode. It is energetically favored that the Au seeds are reacted with a Pb vapor precursor to form molten Au-Pb droplets at temperatures down to 212 °C, further triggering the low-temperature VLS growth of CsPbI₃ NWs. More importantly, this Au-seeded process reduces in-bandgap trap states and consequently avoids Shockley-Read-Hall recombination, contributing to outstanding photodetector performances. Our work extends the powerful Au-seeded VLS growth mode to the emerging halide perovskites, which will facilitate their nanostructures with tailored material properties.

Original language	English
Pages (from-to)	812–819
Journal	Nano Letters
Volume	23
Issue number	3
Online published	8 Feb 2023
DOIs	https://doi.org/10.1021/acs.nanolett.2c03612
Publication status	Published - 8 Feb 2023

Funding

This research was financially supported by a fellowship awardfrom the Research Grants Council of the Hong Kong SpecialAdministrative Region, China (CityU RFS2021-1S04).

Research Keywords

Au seeds
CsPbI3nanowires
exothermic nucleation
optoelectronics
vapor-liquid-solid synthesis

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10.1021/acs.nanolett.2c03612

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@article{fcb8ba9100e0471787f48100eca2ab95,

title = "Au-Seeded CsPbI3 Nanowire Optoelectronics via Exothermic Nucleation",

abstract = "Converting vapor precursors to solid nanostructures via a liquid noble-metal seed is a common vapor deposition principle. However, such a noble-metal-seeded process is excluded from the crystalline halide perovskite synthesis, mainly hindered by the growth mechanism shortness. Herein, powered by a spontaneous exothermic nucleation process (ΔH < 0), the Au-seeded CsPbI3 nanowires (NWs) growth is realized based on a vapor-liquid-solid (VLS) growth mode. It is energetically favored that the Au seeds are reacted with a Pb vapor precursor to form molten Au-Pb droplets at temperatures down to 212 °C, further triggering the low-temperature VLS growth of CsPbI3 NWs. More importantly, this Au-seeded process reduces in-bandgap trap states and consequently avoids Shockley-Read-Hall recombination, contributing to outstanding photodetector performances. Our work extends the powerful Au-seeded VLS growth mode to the emerging halide perovskites, which will facilitate their nanostructures with tailored material properties.",

keywords = "Au seeds, CsPbI3nanowires, exothermic nucleation, optoelectronics, vapor-liquid-solid synthesis",

author = "You Meng and Yuxuan Zhang and Zhengxun Lai and Wei Wang and Weijun Wang and Yezhan Li and Dengji Li and Pengshan Xie and Di Yin and Dong Chen and Chuntai Liu and SenPo Yip and Ho, {Johnny C.}",

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doi = "10.1021/acs.nanolett.2c03612",

language = "English",

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journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Au-Seeded CsPbI3 Nanowire Optoelectronics via Exothermic Nucleation

AU - Meng, You

AU - Zhang, Yuxuan

AU - Lai, Zhengxun

AU - Wang, Wei

AU - Wang, Weijun

AU - Li, Yezhan

AU - Li, Dengji

AU - Xie, Pengshan

AU - Yin, Di

AU - Chen, Dong

AU - Liu, Chuntai

AU - Yip, SenPo

AU - Ho, Johnny C.

PY - 2023/2/8

Y1 - 2023/2/8

N2 - Converting vapor precursors to solid nanostructures via a liquid noble-metal seed is a common vapor deposition principle. However, such a noble-metal-seeded process is excluded from the crystalline halide perovskite synthesis, mainly hindered by the growth mechanism shortness. Herein, powered by a spontaneous exothermic nucleation process (ΔH < 0), the Au-seeded CsPbI3 nanowires (NWs) growth is realized based on a vapor-liquid-solid (VLS) growth mode. It is energetically favored that the Au seeds are reacted with a Pb vapor precursor to form molten Au-Pb droplets at temperatures down to 212 °C, further triggering the low-temperature VLS growth of CsPbI3 NWs. More importantly, this Au-seeded process reduces in-bandgap trap states and consequently avoids Shockley-Read-Hall recombination, contributing to outstanding photodetector performances. Our work extends the powerful Au-seeded VLS growth mode to the emerging halide perovskites, which will facilitate their nanostructures with tailored material properties.

AB - Converting vapor precursors to solid nanostructures via a liquid noble-metal seed is a common vapor deposition principle. However, such a noble-metal-seeded process is excluded from the crystalline halide perovskite synthesis, mainly hindered by the growth mechanism shortness. Herein, powered by a spontaneous exothermic nucleation process (ΔH < 0), the Au-seeded CsPbI3 nanowires (NWs) growth is realized based on a vapor-liquid-solid (VLS) growth mode. It is energetically favored that the Au seeds are reacted with a Pb vapor precursor to form molten Au-Pb droplets at temperatures down to 212 °C, further triggering the low-temperature VLS growth of CsPbI3 NWs. More importantly, this Au-seeded process reduces in-bandgap trap states and consequently avoids Shockley-Read-Hall recombination, contributing to outstanding photodetector performances. Our work extends the powerful Au-seeded VLS growth mode to the emerging halide perovskites, which will facilitate their nanostructures with tailored material properties.

KW - Au seeds

KW - CsPbI3nanowires

KW - exothermic nucleation

KW - optoelectronics

KW - vapor-liquid-solid synthesis

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U2 - 10.1021/acs.nanolett.2c03612

DO - 10.1021/acs.nanolett.2c03612

M3 - RGC 21 - Publication in refereed journal

SN - 1530-6984

VL - 23

SP - 812

EP - 819

JO - Nano Letters

JF - Nano Letters

IS - 3

ER -

Au-Seeded CsPbI₃Nanowire Optoelectronics via Exothermic Nucleation

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RFS: Developing Negative-Capacitance Nanowire Transistor Arrays and Integrated Circuits for Next-Generation Flexible Electronics

Two-Dimensional Layered Bismuth Oxyselenides Crystals for Advanced Electronics/Optoelectronics

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Au-Seeded CsPbI3 Nanowire Optoelectronics via Exothermic Nucleation

Abstract

Funding

Research Keywords

Access Output

Other Access Options

Permanent Link

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Projects

RFS: Developing Negative-Capacitance Nanowire Transistor Arrays and Integrated Circuits for Next-Generation Flexible Electronics

Student theses

Two-Dimensional Layered Bismuth Oxyselenides Crystals for Advanced Electronics/Optoelectronics

Cite this

Au-Seeded CsPbI₃Nanowire Optoelectronics via Exothermic Nucleation