Thermochromic VO2 on Zinnwaldite Mica by pulsed laser deposition

被引：45

作者：

Mathevula, L. ^{[1
,2
]}

Ngom, B. D. ^{[1
,2
]}

Kotsedi, L. ^{[1
,2
]}

Sechogela, P. ^{[1
,2
]}

Doyle, T. B. ^{[2
,3
]}

Ghouti, M. ^{[1
,2
]}

Maaza, M. ^{[1
,2
]}

机构：

[1] Univ S Africa, Coll Grad Studies, UNESCO UNISA Africa Chair Nanosci Nanotechnol, ZA-0001 Pretoria, South Africa

[2] Natl Res Fdn, iThemba LABS, Nanosci African Network NANOAFNET, Western Cape, South Africa

[3] Univ KwaZulu Natal, Sch Chem & Phys, ZA-4001 Durban, South Africa

来源：

APPLIED SURFACE SCIENCE | 2014年 / 314卷

基金：

新加坡国家研究基金会;

关键词：

Pulsed laser deposition; Zinnwaldite Mica; Vanadium dioxide; Thermochromism; Electrical properties; Phase transition; CHEMICAL-VAPOR-DEPOSITION; SOLAR-ENERGY MATERIALS; THIN-FILMS; VANADIUM DIOXIDE; INSULATOR-TRANSITION; OPTICAL-PROPERTIES; OXIDE FILMS; TEMPERATURE; PRECURSORS; SAPPHIRE;

D O I：

10.1016/j.apsusc.2014.07.035

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

VO2 thin films have been deposited by pulsed laser deposition on Zinnwaldite Mica substrates. The crystal structure, chemical composition, morphology were determined and the semiconductor/metal transition (SMT) properties of the deposited films were investigated. Without any post annealing, the films exhibit a textured nature with a VO2 (0 1 1) preferred crystallographic orientation and an elevated thermal variation of the electric resistance ratio R-S/R-M through the SMT at T approximate to 68 degrees C of the order of 10(4) and a narrow similar to 7 degrees C hysteresis. In addition, the growth of the VO2 crystallites seem to be governed likely by a Volmer-Weber or Stranski-Krastanov mechanisms and certainly not a Frank-van Der Merwe process. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：476 / 480

页数：5

共 46 条

[1] THEORY OF SEMICONDUCTOR-TO-METAL TRANSITIONS [J].