Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-20T00:35:34.636Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of Substrate Temperature on the Electrochromic Properties of Cobalt Hydroxide Thin Films Prepared by Reactive Sputtering

Published online by Cambridge University Press:  18 August 2011

KyoungMoo Lee ,
Yoshio Abe ,
Midori Kawamura  and
Hidenobu Itoh
KyoungMoo Lee
Affiliation:
Department of Materials Science and Engineering, Kitami Institute of Technology, 165 Koen-cho, Kitami, 090-8507, Japan
Yoshio Abe
Affiliation:
Department of Materials Science and Engineering, Kitami Institute of Technology, 165 Koen-cho, Kitami, 090-8507, Japan
Midori Kawamura
Affiliation:
Department of Materials Science and Engineering, Kitami Institute of Technology, 165 Koen-cho, Kitami, 090-8507, Japan
Hidenobu Itoh
Affiliation:
Department of Materials Science and Engineering, Kitami Institute of Technology, 165 Koen-cho, Kitami, 090-8507, Japan
Get access

Abstract

Cobalt hydroxide thin films with a thickness of 100 nm were deposited onto glass, Si and indium tin oxide (ITO)-coated glass substrates by reactively sputtering a Co target in H2O gas. The substrate temperature was varied from -20 to +200°C. The EC performance of the films was investigated in 0.1 M KOH aqueous solution. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy of the samples indicated that Co3O4 films were formed at substrate temperatures above 100°C, and amorphous CoOOH films were deposited in the range from 10 to -20°C. A large change in transmittance of approximately 26% and high EC coloration efficiency of 47 cm2/C were obtained at a wavelength of 600 nm for the CoOOH thin film deposited at -20°C. The good EC performance of the CoOOH films is attributed to the low film density and amorphous structure.

Keywords

Cosputteringthin film
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1328: Symposium H – Electrochromic Materials and Devices , 2011 , mrss11-1328-h03-05
Copyright
Copyright © Materials Research Society 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Granqvist, C. G.: “ Handbook of Inorganic Electrochromic Materials”, (Elsevier, Amsterdam, 1995) p.1.Google Scholar
2. Azens, A., Vaivars, G., Veszelei, M., Kullman, L., and Granqvist, C. G.: J. Appl. Phys. 89, 7885 (2001).Google Scholar
3. Azens, A., Avendano, E., Backholm, J., Berggren, L., Gustavsson, G., Karmhag, R., Niklasson, G. A., Roos, A., and Granqvist, C. G.: Mater. Sci. Eng. B 119, 214 (2005).Google Scholar
4. Kadam, L. D., Pawar, S. H., and Patil, P. S., Mater. Chem. Phys. 68, 280 (2001).Google Scholar
5. . Özer, N, Chen, D. G., and Büyüklimanli, T., Sol. Energy Mater. Sol. Cells 52, 223 (2003).Google Scholar
6. Kong, L. B., Liu, M. C., Lang, J. W., Liu, M., Luo, Y. C., and Kang, L., J. Solid State Electrochem. (2010) DOI 10./1007/s10008-010-1125-6.Google Scholar
7. Zhou, W. J., Xu, M. W., Zhao, D. D., Xu, C. L., and Li, H. L., Micropor. Mesopor. Mater. 117, 55 (2009)Google Scholar
8. Hosono, E., Fujihara, S., Honma, I., Ichihara, M., and Zhou, H., J. Power Sources 158, 779 (2006)Google Scholar
9. Ueta, H., Abe, Y., Kato, K., Kawamura, M., Sasaki, K., and Itoh, H., J. Appl. Phys. 48, 015501 (2009).Google Scholar
10. Joint Committee on Powder Diffaction (JCPDS) card 42–1467.Google Scholar
11. Bhatt, A. S., Bhat, D. K., Tai, C. W., and Santosh, M. S., Mater. Chem. Phys. 125, 347 (2011).Google Scholar
12. Tang, C. W., Wang, C. B., and Chien, S. H., Thermochim. Acta 473, 68 (2008).Google Scholar
13. Joint Committee on Powder Diffaction (JCPDS) card 26–480.Google Scholar