The influence of oxygen on the microstructural, optical and photochromic properties of polymer-matrix, tungsten-oxide nanocomposite films

被引：22

作者：

DeJournett, Travis J. ^{[1
]}

Spicer, James B. ^{[1
]}

机构：

[1] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2014年 / 120卷

关键词：

Photochromic; Tungsten-oxide nanocomposite; In situ vapor deposition; WO3; OXIDATION; NANOPARTICLES; MOLYBDENUM; COLORATION; MECHANISM;

D O I：

10.1016/j.solmat.2013.08.023

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

An in situ vapor deposition process has been used to create a photochromic, tungsten-oxide, polymer matrix nanocomposite. Under specific processing conditions, the composite consists of discrete tungsten-oxide nanoparticles distributed uniformly throughout the bulk of an optically transparent fluoropolymer matrix. Ultraviolet exposure of the nanocomposite produces characteristic photochromic changes that result in a 40% change in optical transmission. Optical absorption measurements yield a value of 3.08 eV for the bandgap of the tungsten-oxide particles. Incorporating oxygen as a supplementary deposition agent in the synthesis process increased the transparency of the films in the visible region, increased the change in transmission due to the photochromic effect, and led to the percolation of larger nanoparticles near the film surface. Growth of particles in this region allowed the nanocomposite to be bleached readily in an oxygen atmosphere while retaining photochromic activity. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：102 / 108

页数：7

共 36 条

[1] Comparison between electrochromic and photochromic coloration efficiency of tungsten oxide thin films [J].

Bechinger, C ;

Burdis, MS ;

Zhang, JG .

SOLID STATE COMMUNICATIONS, 1997, 101 (10) :753-756

[2] The role of oxygen partial pressure and annealing temperature on the formation of W=O bonds in thin WO3 films [J].

Bittencourt, C ;

Landers, R ;

Llobet, E ;

Correig, X ;

Calderer, J .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 2002, 17 (06) :522-525

[3] Quantification of active sites for the determination of methanol oxidation turn-over frequencies using methanol chemisorption and in situ infrared techniques. 1. Supported metal oxide catalysts [J].

Burcham, LJ ;

Briand, LE ;

Wachs, IE .

LANGMUIR, 2001, 17 (20) :6164-6174

[4] INFRARED AND RAMAN-STUDY OF WO3 TUNGSTEN TRIOXIDES AND WO3, XH2O TUNGSTEN TRIOXIDE HYDRATES [J].

DANIEL, MF ;

DESBAT, B ;

LASSEGUES, JC ;

GERAND, B ;

FIGLARZ, M .

JOURNAL OF SOLID STATE CHEMISTRY, 1987, 67 (02) :235-247

[5] Insights into the damage mechanism of Teflon® FEP from the Hubble Space Telescope [J].

de Groh, KK ;

Gaier, JR ;

Hall, RL ;

Espe, MP ;

Cato, DR ;

Sutter, JK ;

Scheiman, DA .

HIGH PERFORMANCE POLYMERS, 2000, 12 (01) :83-104

[6] Opportunities and challenges in science and technology of WO3 for electrochromic and related applications [J].

Deb, Satyen K. .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2008, 92 (02) :245-258

[7] Electrodeposited tungsten oxide films: annealing effects on structure and electrochromic performance [J].

Deepa, M ;

Kar, M ;

Agnihotry, SA .

THIN SOLID FILMS, 2004, 468 (1-2) :32-42

[8] Nanostructured mesoporous tungsten oxide films with fast kinetics for electrochromic smart windows [J].

Deepa, M. ;

Srivastava, A. K. ;

Sood, K. N. ;

Agnihotry, S. A. .

NANOTECHNOLOGY, 2006, 17 (10) :2625-2630

[9]

Díaz-Reyes J., 2008, Superf. vacío, V21, P12

[10] On the structure, stress and optical properties of CVD tungsten oxide films [J].

Dimitrova, Z ;

Gogova, D .

MATERIALS RESEARCH BULLETIN, 2005, 40 (02) :333-340

← 1 2 3 4 →