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|Type of Document
||Fabrication of the complementary electrochromic device on flexible substrate|
|Date of Defense
||Complementary electrochromic device
||In this study, the Polyethylene terephthalate (PET) polymer is chosen as flexible substrate. The flexible transparency electrode is fabricated by depositing silicon dioxide film (SiO2) and indium tin oxide film (ITO) on PET substrate. The physical properties and the variation of resistance at different curvature radius of flexible transparency electrode are investigated. Then, the flexible transparency electrode is applied to the WO3-NiO complementary electrochromic device (CECD) and also the characteristics of CECD are investigated.|
The experimental results reveal that the optical transmittance of flexible transparency electrode is 62.83% (λ@550 nm) and the sheet resistance is 30 Ω/sq. The resistance of flexible transparency electrode under various curvature radius of 1~5 cm are 47 Ω~40 Ω. The variation of resistance is 17.5%.
The optimal characteristics of CECD are obtained at 2.2 V colored voltage, the transmittance change (ΔT%) is 27.85%, the optical density (ΔOD) is 0.32, the intercalation charge (Q) is 6.06 mC/cm2 and the color efficiency (η) is 53 cm2/C at wavelength of 550 nm, respectively. The transmittance of colored state increases from 28.90% to 39.75% after 24 hour without biased voltage. The response time (τb) of bleaching of the CECD is found to be about 5 s and the response time (τc) of coloration is 12 s. In high temperature environment, the CECD exhibits stable transmittance change and functions well. Finally, the CECD is attached to glass tube with different curvature radius and driven with scan rate of 50 mV/s from -2.2 V to 2.2 V. It can be found that after driving 100 times, the device work well and have stable charge intercalation under different curvature radius.
||Mau-Phon Houng - chair|
Cheng-Fu Yang - co-chair
Chih-Ming Wang - co-chair
Chien-Jung Huang - co-chair
Ying-Chung Chen - advisor
Indicate in-campus at 5 year and off-campus access at 5 year.|
|Date of Submission