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Selective photochromism in a self-coated WO3/WO3-x homojunction: enhanced solar modulation efficiency, high luminous transmittance and fast self-bleaching rate
Li, Ning; Cao, Xun; Chang, Tianci; Long, Shiwei; Jin, Ping
2019-06-21
Source PublicationNANOTECHNOLOGY
ISSN0957-4484
Volume30Issue:25
SubtypeArticle
AbstractPursuing excellent photochromic (PC) properties is still a longstanding challenge for energy-efficient smart coatings. Herein, we have prepared a novel series of self-coated crystalline WO3-amorphous WO3-x homojunctions by a one-step hydrothermal process, in which oxalic acid was used as a capping agent to prevent polycondensation and the crystallization of [WO6]. The as-prepared nanopowders with tight interfaces have a large specific surface area and rich surface electrons, which leads to a dramatic PC property reaching up to Delta T-sol = 64.74% at the near-infrared (NIR) range of 1000-2600 nm with high luminous transmittance (T-lum = 94.6% in the virgin state and T-lum = 32.47% in the colored state). Meanwhile, the as-prepared crystalline WO3-amorphous WO3-x homojunction reveals fast reversible PC circulation; most particularly, the self-bleaching rate increases at least three times-the self-bleaching time is less than 8 h. Moreover, as the microstructure of the homojunction is tuned, the solar modulation range can be selective and tuned, so that the solar modulation efficiency is up to the best energy-saving state by controlling the main absorption according to the solar energy distribution.
Keywordtungsten oxide homojunction photochromic property the bleaching time oxalic acid
DOI10.1088/1361-6528/ab0778
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Physics
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27040
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Li, Ning,Cao, Xun,Chang, Tianci,et al. Selective photochromism in a self-coated WO3/WO3-x homojunction: enhanced solar modulation efficiency, high luminous transmittance and fast self-bleaching rate[J]. NANOTECHNOLOGY,2019,30(25).
APA Li, Ning,Cao, Xun,Chang, Tianci,Long, Shiwei,&Jin, Ping.(2019).Selective photochromism in a self-coated WO3/WO3-x homojunction: enhanced solar modulation efficiency, high luminous transmittance and fast self-bleaching rate.NANOTECHNOLOGY,30(25).
MLA Li, Ning,et al."Selective photochromism in a self-coated WO3/WO3-x homojunction: enhanced solar modulation efficiency, high luminous transmittance and fast self-bleaching rate".NANOTECHNOLOGY 30.25(2019).
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