VHF Plasma CVD Synthesis of Photochromic ZnO Nanoparticle

Hiroshi Kajiyama; Shin Kuboyama; Atsushi Otomo; Hiroki Uyama; Toshihiro Matsuura; Shuhei Inoue; Yukihiko Matsumura; Keiji Takata; Kentaro Tomita; Kiichiro Uchino

doi:10.1557/adv.2019.80

VHF Plasma CVD Synthesis of Photochromic ZnO Nanoparticle

Hiroshi Kajiyama, Shin Kuboyama, Atsushi Otomo, Hiroki Uyama, Toshihiro Matsuura, Shuhei Inoue, Yukihiko Matsumura, Keiji Takata, Kentaro Tomita, Kiichiro Uchino

Electrical Engineering Sciences

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

Abstract

Photochromic (PC) ZnO nanoparticles are synthesized for the first time by using a VHF plasma enhanced CVD apparatus. The prepared ZnO film changes from transparent to PC state under UV irradiation; on being subjected to heat treatment, it changes back to transparent state. There is a threshold temperature for attaining the PC phase. The Debye-Waller factor of Zn atoms is specifically large for the PC ZnO. The ZnO nanoparticles contain carbon as impurity. The effects of C-O bonds on the ZnO crystal structure and density of states (DOS) are simulated based on density-functional theory. The results reveal that the crystal structure is slightly distorted and a sufficient DOS for PC light absorption is formed in the band gap.

Original language	English
Pages (from-to)	1573-1577
Number of pages	5
Journal	MRS Advances
Volume	4
Issue number	27
DOIs	https://doi.org/10.1557/adv.2019.80
Publication status	Published - 2019

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Mechanics of Materials
Materials Science(all)
Condensed Matter Physics

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10.1557/adv.2019.80

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@article{592be1c8e8bb4376b909293c4accc5ab,

title = "VHF Plasma CVD Synthesis of Photochromic ZnO Nanoparticle",

abstract = "Photochromic (PC) ZnO nanoparticles are synthesized for the first time by using a VHF plasma enhanced CVD apparatus. The prepared ZnO film changes from transparent to PC state under UV irradiation; on being subjected to heat treatment, it changes back to transparent state. There is a threshold temperature for attaining the PC phase. The Debye-Waller factor of Zn atoms is specifically large for the PC ZnO. The ZnO nanoparticles contain carbon as impurity. The effects of C-O bonds on the ZnO crystal structure and density of states (DOS) are simulated based on density-functional theory. The results reveal that the crystal structure is slightly distorted and a sufficient DOS for PC light absorption is formed in the band gap.",

author = "Hiroshi Kajiyama and Shin Kuboyama and Atsushi Otomo and Hiroki Uyama and Toshihiro Matsuura and Shuhei Inoue and Yukihiko Matsumura and Keiji Takata and Kentaro Tomita and Kiichiro Uchino",

note = "Funding Information: This research was supported by the ALCA and A-STEP programs of Japan Science and Technology Agency. This research was partially supported by JSPS KAKENHI Grant Number JP15K04603 and JP26390098. A part of this work was performed under the Cooperative Research Program of {"}Network Joint Research Center for Materials and Devices”. X-ray measurements were done at Kyushu Synchrotron Light Research Center. Publisher Copyright: {\textcopyright} Materials Research Society 2019.",

year = "2019",

doi = "10.1557/adv.2019.80",

language = "English",

volume = "4",

pages = "1573--1577",

journal = "MRS Advances",

issn = "2059-8521",

publisher = "Materials Research Society",

number = "27",

}

TY - JOUR

T1 - VHF Plasma CVD Synthesis of Photochromic ZnO Nanoparticle

AU - Kajiyama, Hiroshi

AU - Kuboyama, Shin

AU - Otomo, Atsushi

AU - Uyama, Hiroki

AU - Matsuura, Toshihiro

AU - Inoue, Shuhei

AU - Matsumura, Yukihiko

AU - Takata, Keiji

AU - Tomita, Kentaro

AU - Uchino, Kiichiro

N1 - Funding Information: This research was supported by the ALCA and A-STEP programs of Japan Science and Technology Agency. This research was partially supported by JSPS KAKENHI Grant Number JP15K04603 and JP26390098. A part of this work was performed under the Cooperative Research Program of "Network Joint Research Center for Materials and Devices”. X-ray measurements were done at Kyushu Synchrotron Light Research Center. Publisher Copyright: © Materials Research Society 2019.

PY - 2019

Y1 - 2019

N2 - Photochromic (PC) ZnO nanoparticles are synthesized for the first time by using a VHF plasma enhanced CVD apparatus. The prepared ZnO film changes from transparent to PC state under UV irradiation; on being subjected to heat treatment, it changes back to transparent state. There is a threshold temperature for attaining the PC phase. The Debye-Waller factor of Zn atoms is specifically large for the PC ZnO. The ZnO nanoparticles contain carbon as impurity. The effects of C-O bonds on the ZnO crystal structure and density of states (DOS) are simulated based on density-functional theory. The results reveal that the crystal structure is slightly distorted and a sufficient DOS for PC light absorption is formed in the band gap.

AB - Photochromic (PC) ZnO nanoparticles are synthesized for the first time by using a VHF plasma enhanced CVD apparatus. The prepared ZnO film changes from transparent to PC state under UV irradiation; on being subjected to heat treatment, it changes back to transparent state. There is a threshold temperature for attaining the PC phase. The Debye-Waller factor of Zn atoms is specifically large for the PC ZnO. The ZnO nanoparticles contain carbon as impurity. The effects of C-O bonds on the ZnO crystal structure and density of states (DOS) are simulated based on density-functional theory. The results reveal that the crystal structure is slightly distorted and a sufficient DOS for PC light absorption is formed in the band gap.

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JF - MRS Advances

SN - 2059-8521

IS - 27

ER -

VHF Plasma CVD Synthesis of Photochromic ZnO Nanoparticle

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