Optical and electrochromic properties of amorphous and crystalline tungsten oxide films

Esra Ozkan; Se Hee Lee; C. Edwin Tracy; Fatma Z. Tepehan; J. Roland Pitts; Satyen K. Deb

doi:10.1117/12.448250

Optical and electrochromic properties of amorphous and crystalline tungsten oxide films

Esra Ozkan, Se Hee Lee, C. Edwin Tracy, Fatma Z. Tepehan, J. Roland Pitts, Satyen K. Deb

Department of Physics Engineering

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

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Abstract

A detailed systematic study of the tungsten oxide thin films has been carried out using colored WO₃ films after they were annealed at progressively increasing temperatures ranging from 350 to 450°C in oxygen environments. The structural properties of the films were characterized using x-ray diffraction (XRD) and Raman spectroscopy. The amorphous WO₃ films remain as an amorphous phase up to 385 °C and begin to crystallize at 390°C and then are completely crystallized at 450°C. Absorption peaks of the films are found to shift to a higher energy side with increasing annealing temperature up to 385°C and then shift abruptly to a lower energy as the films begin to crystallize at 390°C.

Original language	English
Pages (from-to)	203-210
Number of pages	8
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4458
DOIs	https://doi.org/10.1117/12.448250
Publication status	Published - 2001

Keywords

Electrochromism
Thermal evaporation
Tungsten oxide

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10.1117/12.448250

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title = "Optical and electrochromic properties of amorphous and crystalline tungsten oxide films",

abstract = "A detailed systematic study of the tungsten oxide thin films has been carried out using colored WO3 films after they were annealed at progressively increasing temperatures ranging from 350 to 450°C in oxygen environments. The structural properties of the films were characterized using x-ray diffraction (XRD) and Raman spectroscopy. The amorphous WO3 films remain as an amorphous phase up to 385 °C and begin to crystallize at 390°C and then are completely crystallized at 450°C. Absorption peaks of the films are found to shift to a higher energy side with increasing annealing temperature up to 385°C and then shift abruptly to a lower energy as the films begin to crystallize at 390°C.",

keywords = "Electrochromism, Thermal evaporation, Tungsten oxide",

author = "Esra Ozkan and Lee, {Se Hee} and Tracy, {C. Edwin} and Tepehan, {Fatma Z.} and Pitts, {J. Roland} and Deb, {Satyen K.}",

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T1 - Optical and electrochromic properties of amorphous and crystalline tungsten oxide films

AU - Ozkan, Esra

AU - Lee, Se Hee

AU - Tracy, C. Edwin

AU - Tepehan, Fatma Z.

AU - Pitts, J. Roland

AU - Deb, Satyen K.

PY - 2001

Y1 - 2001

N2 - A detailed systematic study of the tungsten oxide thin films has been carried out using colored WO3 films after they were annealed at progressively increasing temperatures ranging from 350 to 450°C in oxygen environments. The structural properties of the films were characterized using x-ray diffraction (XRD) and Raman spectroscopy. The amorphous WO3 films remain as an amorphous phase up to 385 °C and begin to crystallize at 390°C and then are completely crystallized at 450°C. Absorption peaks of the films are found to shift to a higher energy side with increasing annealing temperature up to 385°C and then shift abruptly to a lower energy as the films begin to crystallize at 390°C.

AB - A detailed systematic study of the tungsten oxide thin films has been carried out using colored WO3 films after they were annealed at progressively increasing temperatures ranging from 350 to 450°C in oxygen environments. The structural properties of the films were characterized using x-ray diffraction (XRD) and Raman spectroscopy. The amorphous WO3 films remain as an amorphous phase up to 385 °C and begin to crystallize at 390°C and then are completely crystallized at 450°C. Absorption peaks of the films are found to shift to a higher energy side with increasing annealing temperature up to 385°C and then shift abruptly to a lower energy as the films begin to crystallize at 390°C.

KW - Electrochromism

KW - Thermal evaporation

KW - Tungsten oxide

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VL - 4458

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JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

ER -

Optical and electrochromic properties of amorphous and crystalline tungsten oxide films

Abstract

Keywords

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