Thermochromic VO2 films from ammonium citrato-oxovanadate(IV) with excellent optical and phase transition properties
Zhang, J; Tian, H; Hao, L; Jin, X; Yang, CM; Wang, J; Cui, XM; Wang, CH; Zhang, C; Zhang, C; Xu, Y; Xu, Y (reprint author), Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China.
2016
发表期刊JOURNAL OF MATERIALS CHEMISTRY C
ISSN2050-7526
卷号4期号:23页码:5281—5288
文章类型期刊文献
摘要Thermochromic VO2 film is a potential material for energy-saving windows in future buildings. Considering the difficulty in controlling the valence state and polymorphism during the formation of VO2 (M) film, we propose a facile and safe solution method of fabricating monoclinic (M) VO2 film directly from the newly synthesized ammonium citrato-oxovanadate(IV) compound [(NH4)(4)[V2O2(C6H4O7)(2)]center dot 2H(2)O, denoted as CA-V(IV)], as a vanadium(IV) precursor to stabilize vanadium in the 4+ valence state without utilizing V2O5 as an intermediate or complex post-treatment in vacuum. This new ambient-stable compound CA-V(IV) contains centrosymmetric dinuclear complex anions [{VO(C6H4O7)}(2)](4-), in which the carboxylate groups are coordinated to the V4+ ions in a monodentate fashion and each vanadium atom exhibits distorted octahedral geometry. With a perfect monoclinic phase, the VO2 films possessed excellent thermochromic and visible transmissive properties. Accompanying a change in film thickness from 119 nm to 41 nm, the integral visible transmittance T-vis at 25 degrees C of VO2 films ranged from 38.4% to 70.0%. The maximum visible transmittance (T-max) reached 77.2% for VO2 film with a thickness of 41 nm, which shows that the phase transition of VO2 did not greatly affect the visible transmittance of the film. For the VO2 film with a thickness of 41 nm, of which the visible transmittance modulation (Lambda T-vis = 2.1%) was the largest among the three samples, the solar energy modulation (Delta T-sol) reached 11.3%. Moreover, the transition temperature of our VO2 films was far below that of bulk VO2 (68 degrees C), and the best transition temperature was as low as 50.8 degrees C.
关键词Chemical-vapor-deposition Metal-insulator-transition Dioxide Thin-films Smart Window Vanadium Transmittance Nanoparticles Precursor Coatings Temperature
DOI10.1039/c6tc00315j
收录类别SCI
语种英语
WOS记录号WOS:000378273700015
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25873
专题中科院上海应用物理研究所2011-2018年
通讯作者Xu, Y (reprint author), Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China.
推荐引用方式
GB/T 7714
Zhang, J,Tian, H,Hao, L,et al. Thermochromic VO2 films from ammonium citrato-oxovanadate(IV) with excellent optical and phase transition properties[J]. JOURNAL OF MATERIALS CHEMISTRY C,2016,4(23):5281—5288.
APA Zhang, J.,Tian, H.,Hao, L.,Jin, X.,Yang, CM.,...&Xu, Y .(2016).Thermochromic VO2 films from ammonium citrato-oxovanadate(IV) with excellent optical and phase transition properties.JOURNAL OF MATERIALS CHEMISTRY C,4(23),5281—5288.
MLA Zhang, J,et al."Thermochromic VO2 films from ammonium citrato-oxovanadate(IV) with excellent optical and phase transition properties".JOURNAL OF MATERIALS CHEMISTRY C 4.23(2016):5281—5288.
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