Logotype-selective electrochromic glass display
| Autor: | Chien Chon Chen, Wern Dare Jheng |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Auxiliary electrode
Materials science business.industry Process Chemistry and Technology Electrolyte Sputter deposition Surfaces Coatings and Films Electronic Optical and Magnetic Materials Active layer Optics Electrochromism Materials Chemistry Ceramics and Composites Transmittance Optoelectronics Nyquist plot business Current density |
| Zdroj: | Ceramics International. 38:5835-5842 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2012.04.033 |
| Popis: | This paper describes a fabrication method of a logotype-selective electrochromic (EC) glass. The EC glass performance based on the sample size, WO 3 film thickness, and internal impedances under various applied voltages are also discussed. The logotype-selective electrochromic glass was fabricated by the sputter deposition process. Both working and counter electrode were coated with ITO/WO 3 films. The specific logotypes of “NCUT” and “NUU” can be displayed with positive and negative voltages applied to the EC glass. EC glasses of various sizes (1 cm 2 , 4 cm 2 , 9 cm 2 , 25 cm 2 , and 100 cm 2 ) were also fabricated by sputter deposition process. When voltage (−3.5 V) was applied to the device, the active layer of the assembled device changed from almost transparent to a translucent blue color (colored). The average transmittance in the visible region of the spectrum for a 100 cm 2 EC device was 73% in the bleached state. The best device, with a 140 nm WO 3 active layer, had average transmittances in the colored and bleached states of 11.9% and 54.8%, respectively. Cyclic voltammogram tests showed that reproducibility of the colored/bleached cycles was good. Nyquist plots showed that increasing the device size decreased the current density, and the electrolyte impedance increased because of a low conductive electrolyte in the device. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect