전기변색 성능 향상을 위한 바나듐산화물 막의 결정성 제어 효과

김규호; 배주원; 이태근; 안효진; Kue-Ho Kim; Ju-Won Bae; Tae-Kuen Lee; Hyo-Jin Ahn

Korean Journal of Materials Research, Vol.29, No.6, 385-391, June, 2019

DOI10.3740/MRSK.2019.29.6.385 Export Citation

전기변색 성능 향상을 위한 바나듐산화물 막의 결정성 제어 효과

Crystallinity Control Effects on Vanadium Oxide Films for Enhanced Electrochromic Performances

김규호, 배주원, 이태근^†, 안효진 ^†

서울과학기술대학교 신소재공학과

Kue-Ho Kim, Ju-Won Bae, Tae-Kuen Lee^†, and Hyo-Jin Ahn^†

Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea

E-mail:,

In the present study, vanadium oxide(V2O5) films for electrochromic(EC) application are fabricated using sol-gel spin coating method. In order to optimize the EC performance of the V2O5 films, we adjust the amounts of polyvinylpyrrolidone(PVP) added to the solution at 0, 5, 10, and 15 wt%. Due to the effect of added PVP on the V2O5 films, the obtained films show increases of film thickness and crystallinity. Compared to other samples, optimum weight percent(10 wt%) of PVP led to superior EC performance with transmittance modulation(45.43 %), responding speeds(6.0 s at colored state and 6.2 s at bleached state), and coloration efficiency(29.8 cm2/C). This performance improvement can be mainly attributed to the enhanced electrical conductivity and electrochemical activity due to the increased crystallinity and thickness of the V2O5 films. Therefore, V2O5 films fabricated with optimized amount of PVP can be a promising EC material for high-performance EC devices.

Keywords:electrochromic performance;film structure;crystallinity;vanadium oxide;spin-coating

[References]

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Koo BR, Kim KH, Ahn HJ, Appl. Surf. Sci., 453, 238 (2018)
Chang XT, Hu RR, Sun SB, Liu JR, Lei YH, Liu T, Dong LH, Yin YS, Appl. Surf. Sci., 441, 105 (2018)
Liu SP, Qu XS, Appl. Surf. Sci., 412, 189 (2017)
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Koo BR, Kim KH, Ahn HJ, Nanoscale, 11, 3318 (2019)
Tong Z, Liu S, Li X, Zhao J, Li Y, Nanoscale, 3, 261 (2018)
Rakibuddin M, Kim H, Ceram. Int., 44, 16615 (2018)
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Cheng KC, Chen FR, Kai JJ, Sol. Energy Mater. Sol. Cells, 90(7-8), 1156 (2006)
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Koczkur KM, Mourdikoudis S, Polavarapu L, Skrabalak SE, Dalton Trans., 44, 17883 (2015)
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Kamal H, Akl AA, Abdel-Hady K, Phys. B, 349, 192 (2004)
Koo BR, Bae JW, Ahn HJ, Ceram. Int., 45, 12325 (2019)
Kim KH, Koo BR, Ahn HJ, Ceram. Int., 44, 9408 (2018)
Kim CY, Escuadro AA, Stair PC, Bedzyk MJ, J. Phys. Chem. C, 111, 1874 (2007)
Bae JW, Koo BR, Lee TK, Ahn HJ, J. Korean Powder Metall. Inst., 25, 1 (2018)
Koo BR, Ahn HJ, Nanoscale, 9, 17788 (2017)
He W, Liu Y, Wan Z, Jia C, RSC Adv., 6, 68997 (2016)
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[3] Stec GJ, Lauchner A, Cui Y, Nordlander P, Halas NJ, ACS Nano, 11, 3254 (2017)

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