Nanoscale physico-chemical investigation of complementary ZnO-Si nanocomposites and their photoconductive behavior

Ji Hwan Kwon; Jonghyurk Park; Gyeong Su Park; Jian Min Zuo; Seung Youl Kang; Ji Young Oh; Miyoung Kim

doi:10.1016/j.cap.2016.11.013

Nanoscale physico-chemical investigation of complementary ZnO-Si nanocomposites and their photoconductive behavior

Ji Hwan Kwon, Jonghyurk Park, Gyeong Su Park, Jian Min Zuo, Seung Youl Kang, Ji Young Oh, Miyoung Kim

Research output: Contribution to journal › Article › peer-review

Abstract

The complementary ZnO-Si nanocomposites were synthesized via facile solution process at room temperature and enhanced photoconductive switching behavior was observed under a white light irradiation. The morphology and atomic/electronic structure of ZnO-Si nanocomposites were investigated by atomic-resolution (scanning) transmission electron microscopy combined with electron energy loss spectroscopy. It is revealed that host ZnO nanorods contained peculiar nm-sized Si-rich phases on the ZnO surface, in which effective band gap was significantly decreased. Our results explain a collaborative interaction between host ZnO nanorods and Si-rich phase which led to an enhancement of photoconductive properties over as-prepared ZnO nanorod.

Original language	English (US)
Pages (from-to)	152-156
Number of pages	5
Journal	Current Applied Physics
Volume	17
Issue number	2
DOIs	https://doi.org/10.1016/j.cap.2016.11.013
State	Published - Feb 1 2017

Keywords

Electron energy loss spectroscopy (EELS)
Photocurrents
Scanning transmission electron microscopy (STEM)
ZnO-Si nanocomposites

ASJC Scopus subject areas

General Materials Science
General Physics and Astronomy

Online availability

10.1016/j.cap.2016.11.013

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title = "Nanoscale physico-chemical investigation of complementary ZnO-Si nanocomposites and their photoconductive behavior",

abstract = "The complementary ZnO-Si nanocomposites were synthesized via facile solution process at room temperature and enhanced photoconductive switching behavior was observed under a white light irradiation. The morphology and atomic/electronic structure of ZnO-Si nanocomposites were investigated by atomic-resolution (scanning) transmission electron microscopy combined with electron energy loss spectroscopy. It is revealed that host ZnO nanorods contained peculiar nm-sized Si-rich phases on the ZnO surface, in which effective band gap was significantly decreased. Our results explain a collaborative interaction between host ZnO nanorods and Si-rich phase which led to an enhancement of photoconductive properties over as-prepared ZnO nanorod.",

keywords = "Electron energy loss spectroscopy (EELS), Photocurrents, Scanning transmission electron microscopy (STEM), ZnO-Si nanocomposites",

author = "Kwon, {Ji Hwan} and Jonghyurk Park and Park, {Gyeong Su} and Zuo, {Jian Min} and Kang, {Seung Youl} and Oh, {Ji Young} and Miyoung Kim",

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doi = "10.1016/j.cap.2016.11.013",

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T1 - Nanoscale physico-chemical investigation of complementary ZnO-Si nanocomposites and their photoconductive behavior

AU - Kwon, Ji Hwan

AU - Park, Jonghyurk

AU - Park, Gyeong Su

AU - Zuo, Jian Min

AU - Kang, Seung Youl

AU - Oh, Ji Young

AU - Kim, Miyoung

PY - 2017/2/1

Y1 - 2017/2/1

N2 - The complementary ZnO-Si nanocomposites were synthesized via facile solution process at room temperature and enhanced photoconductive switching behavior was observed under a white light irradiation. The morphology and atomic/electronic structure of ZnO-Si nanocomposites were investigated by atomic-resolution (scanning) transmission electron microscopy combined with electron energy loss spectroscopy. It is revealed that host ZnO nanorods contained peculiar nm-sized Si-rich phases on the ZnO surface, in which effective band gap was significantly decreased. Our results explain a collaborative interaction between host ZnO nanorods and Si-rich phase which led to an enhancement of photoconductive properties over as-prepared ZnO nanorod.

AB - The complementary ZnO-Si nanocomposites were synthesized via facile solution process at room temperature and enhanced photoconductive switching behavior was observed under a white light irradiation. The morphology and atomic/electronic structure of ZnO-Si nanocomposites were investigated by atomic-resolution (scanning) transmission electron microscopy combined with electron energy loss spectroscopy. It is revealed that host ZnO nanorods contained peculiar nm-sized Si-rich phases on the ZnO surface, in which effective band gap was significantly decreased. Our results explain a collaborative interaction between host ZnO nanorods and Si-rich phase which led to an enhancement of photoconductive properties over as-prepared ZnO nanorod.

KW - Electron energy loss spectroscopy (EELS)

KW - Photocurrents

KW - Scanning transmission electron microscopy (STEM)

KW - ZnO-Si nanocomposites

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Nanoscale physico-chemical investigation of complementary ZnO-Si nanocomposites and their photoconductive behavior

Abstract

Keywords

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