Synthesis and thermochromic property studies on W doped VO2 films fabricated by sol-gel method

Abstract Tungsten-doped VO2 thin films have been synthesized by a modified sol–gel process and followed by a post annealing. Vanadium pentoxide and tungstic acid as raw materials with the addition of hydrogen peroxide, concentrated hydrochloric acid (catalyst) and oxalic acid used as reducing agent...

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Autores principales:	Guoping Pan, Jinhua Yin, Keli Ji, Xiang Li, Xingwang Cheng, Haibo Jin, Jiping Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/645f78cb13ee41539f5d5ab7cf481cc3
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spelling	oai:doaj.org-article:645f78cb13ee41539f5d5ab7cf481cc32021-12-02T12:32:04ZSynthesis and thermochromic property studies on W doped VO2 films fabricated by sol-gel method10.1038/s41598-017-05229-92045-2322https://doaj.org/article/645f78cb13ee41539f5d5ab7cf481cc32017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05229-9https://doaj.org/toc/2045-2322Abstract Tungsten-doped VO2 thin films have been synthesized by a modified sol–gel process and followed by a post annealing. Vanadium pentoxide and tungstic acid as raw materials with the addition of hydrogen peroxide, concentrated hydrochloric acid (catalyst) and oxalic acid used as reducing agent were reacted in isobutanol. Finally, the uniform sol of vanadyl oxalate in isobutanol solvent was obtained as precursor. Detailed study suggested that W doped in VO2 introduces additional electron carriers and induces the formation of V3+. Post annealing under vacuum promotes the releasing of chemical stress and generates oxygen vacancies in the samples. Temperature dependent transmittance study revealed that the releasing of chemical stress and deliberately introducing oxygen vacancies in W-doped VO2 films have positive effects on enhancing its switching ability in the infrared transmittance as the metal-insulator transition (MIT) occurs. The largest switching of transmittance was obtained about 48% in the infrared range at 43 °C in 1.5%W doped VO2 films, which is significantly larger than the reported ones. The findings in this work open a new way to synthesize the novel and thermochromic W doped VO2 films with facility and low cost. Therefore, it has extensive application to construct smart windows and electronic devices.Guoping PanJinhua YinKeli JiXiang LiXingwang ChengHaibo JinJiping LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Guoping Pan Jinhua Yin Keli Ji Xiang Li Xingwang Cheng Haibo Jin Jiping Liu Synthesis and thermochromic property studies on W doped VO2 films fabricated by sol-gel method
description	Abstract Tungsten-doped VO2 thin films have been synthesized by a modified sol–gel process and followed by a post annealing. Vanadium pentoxide and tungstic acid as raw materials with the addition of hydrogen peroxide, concentrated hydrochloric acid (catalyst) and oxalic acid used as reducing agent were reacted in isobutanol. Finally, the uniform sol of vanadyl oxalate in isobutanol solvent was obtained as precursor. Detailed study suggested that W doped in VO2 introduces additional electron carriers and induces the formation of V3+. Post annealing under vacuum promotes the releasing of chemical stress and generates oxygen vacancies in the samples. Temperature dependent transmittance study revealed that the releasing of chemical stress and deliberately introducing oxygen vacancies in W-doped VO2 films have positive effects on enhancing its switching ability in the infrared transmittance as the metal-insulator transition (MIT) occurs. The largest switching of transmittance was obtained about 48% in the infrared range at 43 °C in 1.5%W doped VO2 films, which is significantly larger than the reported ones. The findings in this work open a new way to synthesize the novel and thermochromic W doped VO2 films with facility and low cost. Therefore, it has extensive application to construct smart windows and electronic devices.
format	article
author	Guoping Pan Jinhua Yin Keli Ji Xiang Li Xingwang Cheng Haibo Jin Jiping Liu
author_facet	Guoping Pan Jinhua Yin Keli Ji Xiang Li Xingwang Cheng Haibo Jin Jiping Liu
author_sort	Guoping Pan
title	Synthesis and thermochromic property studies on W doped VO2 films fabricated by sol-gel method
title_short	Synthesis and thermochromic property studies on W doped VO2 films fabricated by sol-gel method
title_full	Synthesis and thermochromic property studies on W doped VO2 films fabricated by sol-gel method
title_fullStr	Synthesis and thermochromic property studies on W doped VO2 films fabricated by sol-gel method
title_full_unstemmed	Synthesis and thermochromic property studies on W doped VO2 films fabricated by sol-gel method
title_sort	synthesis and thermochromic property studies on w doped vo2 films fabricated by sol-gel method
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/645f78cb13ee41539f5d5ab7cf481cc3
work_keys_str_mv	AT guopingpan synthesisandthermochromicpropertystudiesonwdopedvo2filmsfabricatedbysolgelmethod AT jinhuayin synthesisandthermochromicpropertystudiesonwdopedvo2filmsfabricatedbysolgelmethod AT keliji synthesisandthermochromicpropertystudiesonwdopedvo2filmsfabricatedbysolgelmethod AT xiangli synthesisandthermochromicpropertystudiesonwdopedvo2filmsfabricatedbysolgelmethod AT xingwangcheng synthesisandthermochromicpropertystudiesonwdopedvo2filmsfabricatedbysolgelmethod AT haibojin synthesisandthermochromicpropertystudiesonwdopedvo2filmsfabricatedbysolgelmethod AT jipingliu synthesisandthermochromicpropertystudiesonwdopedvo2filmsfabricatedbysolgelmethod
_version_	1718394160740827136

Synthesis and thermochromic property studies on W doped VO2 films fabricated by sol-gel method

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