Bleached state transmittance in charge-unbalanced all-solid-state electrochromic devices

Ahn, Kwang-Soon; Nah, Yoon-Chae; Park, Jin-Young; Sung, Yung-Eun; Cho, Ki-Yun; Shin, Seung-Shik; Park, Jung-Ki
May 2003
Applied Physics Letters;5/19/2003, Vol. 82 Issue 20, p3379
Academic Journal
The bleached state transmittance of a charge-unbalanced, complementary electrochromic (EC) device may show residual coloration due to the presence of residual charges. In this study, EC devices were fabricated with configurations G/ITO/Ni(OH)[sub 2]/Ta[sub 2]O[sub 5]/H[sup +]-SPE/Ta[sub 2]O[sub 5]/WO[sub 3]/ITO/G and G/ITO/NiOOH/Ta[sub 2]O[sub 5]/H[sup +]-SPE/Ta[sub 2]O[sub 5]/HWO[sub 3]/ITO/G (G= glass, H[sup +]-SPE =proton-conducting solid polymer electrolytes, and ITO=indium tin oxide). These devices, referred to as EC1 and EC2, were initially fabricated from fully bleached EC layers and from fully colored EC layers, respectively. The change in electrochromic properties as a function of charge capacity ratio (R) for each device was then compared. In comparison to EC2 devices, ECl devices provided better bleached-state transmittances and higher coloration efficiencies over a wider range of R, and were less sensitive to changes in R value. This may arise because the absorbance caused by the residual charges in the colored state is greater and more sensitive to the charge capacity ratio than that in the bleached state.


Related Articles

  • Electrolyte thickness dependence of the electrochromic behavior of ‘‘a-WO3’’ films. Ashrit, P. V.; Pelletier, Denis J.; Girouard, Fernand E.; Truong, Vo-Van // Journal of Applied Physics;7/1/1985, Vol. 58 Issue 1, p564 

    Studies the electrochromic behavior of all-solid-state device. Details on the experiment; Results of the study; Conclusion.

  • All-solid-state electrochromic device composed of WO[sub 3] and Ni(OH)[sub 2] with a Ta[sub 2]O[sub 5] protective layer. Ahn, Kwang-Soon; Nah, Yoon-Chae; Sung, Yung-Eun; Cho, Ki-Yun; Shin, Seung-Shik; Park, Jung-Ki // Applied Physics Letters;11/18/2002, Vol. 81 Issue 21, p3930 

    An all-solid-state electrochromic device composed of WO[sub 3] and Ni(OH)[sub 2] with a Ta[sub 2]O[sub 5] protective layer was prepared by rf magnetron sputtering and lamination with a proton-conducting solid polymer electrolyte. This device had good durability, high transmittance modulation...

  • Effect of V2O5 content on the optical, structural and electrochromic properties of TiO2 and ZrO2 thin films. Turhan, I.; Tepehan, F. Z.; Tepehan, G. G. // Journal of Materials Science;Mar2005, Vol. 40 Issue 6, p1359 

    Vanadium oxide (V2O5) mixed titanium oxide (TiO2) and zirconium oxide (ZrO2) thin films were fabricated on glass substrates (corning 2947) and on indium tin oxide (ITO) coated glass substrates by sol gel spin coating process. Their optical, structural and electrochromic properties were...

  • BIPV-Powered Smart Windows Utilizing Photovoltaic and Electrochromic Devices. Rong-Hua Ma; Yu-Chia Chen // Sensors (14248220);2012, Vol. 12 Issue 1, p359 

    A BIPV-powered smart window comprising a building-integrated photovoltaic (BIPV) panel and an all-solid-state electrochromic (EC) stack is proposed. In the proposed device, the output voltage of the BIPV panel varies in accordance with the intensity of the incident light and is modulated in such...

  • Electrochromic Devices for Satellite Thermal Control. Demiryont, Hulya; Shannon III, Kenneth; Ponnappan, Rengasamy // AIP Conference Proceedings;2006, Vol. 813 Issue 1, p64 

    This paper gives information regarding a new solid-state thin film electrochromic device (ECD) designed for IR emissivity modulation. The variable emissive properties make the new ECD an ideal spacecraft antenna thermal management system. Specific attention is focused on a new electrochromic...

  • Near colorless all-solid-state switchable mirror based on magnesium-titanium thin film. Tajima, Kazuki; Yamada, Yasusei; Bao, Shanhu; Okada, Masahisa; Yoshimura, Kazuki // Journal of Applied Physics;Jan2008, Vol. 103 Issue 1, p013512 

    Magnesium-titanium (Mg–Ti) thin film was applied to all-solid-state switchable mirror by magnetron sputtering. Mg–Ti thin film works as an anodic electrochromic material of optical switching layer of the device. For clear transparency and durability of the device, a composition of...

  • Infrared-sensitive electrochromic device based on VO2. Nakano, M.; Shibuya, K.; Ogawa, N.; Hatano, T.; Kawasaki, M.; Iwasa, Y.; Tokura, Y. // Applied Physics Letters;10/7/2013, Vol. 103 Issue 15, p153503 

    The field-effect transistor (FET) provides an electrical switching function of current flowing through a channel surface by external voltage. Here, we report on a field-effect device that enables electrical switching of optical transmittance as well as conventional electrical current. We...

  • Optical switching properties of RCo2-type alloy hydride based solid state device. Srinivas, G.; Sankaranarayanan, V.; Ramaprabhu, S. // Journal of Applied Physics;Sep2008, Vol. 104 Issue 6, p064504 

    The optical switching properties of a solid state device based on Ho0.6Mm0.4Co2 (HMC) alloy thin film as a switching active layer, water pretreated Nafion membrane as a solid electrolyte, and a transparent conducting indium tin oxide (ITO) as a counterelectrode are investigated. The device is...

  • Switching Colors with Electricity. Mortimer, Roger J. // American Scientist;Jan/Feb2013, Vol. 101 Issue 1, p38 

    The article considers electrochromic materials, materials which alter their color in response to electrical voltage. The use of a thin film of electrochromic material in an electric circuit to create an electrochemical cell which can change colors is discussed. Commercial products and proposed...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics