Fabrication of an Automatic Color-Tuned System with Flexibility Using a Dry Deposited Photoanode
- 130 Downloads
A self-powered electrochromic device was fabricated on an indium tin oxide-polyethylene naphthalate flexible substrate using a dyesensitized solar cell (DSSC) as a self-harvesting source; the electrochromic device was naturally bleached and operated under outdoor light conditions. The color of the organic electrochromic polymer, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate, was shifted from pale blue to deep blue with an antimony tin oxide film as a charge-balanced material. Electrochromic performance was enhanced by secondary doping using dimethyl sulfoxide. As a result, the device showed stable switching behavior with a high transmittance change difference of 40% at its specific wavelength of 630 nm for 6 hrs. To improve the efficiency of the solar cell, 1.0 wt.% of Ag NWs in the photoanode was applied to the TiO2 photoanode. It resulted in an efficiency of 3.3%, leading to an operating voltage of 0.7 V under xenon lamp conditions. As a result, we built a standalone self-harvesting electrochromic system with the performance of transmittance switching of 29% at 630 nm, by connecting with two solar cells in a device. Thus, a self-harvesting and flexible device was fabricated to operate automatically under the irradiated/dark conditions.
KeywordsSelf-harvesting Electrochromic device Dye-sensitized solar cell Dry deposition system
Unable to display preview. Download preview PDF.
- 1.Kim, H., Kim, K., Choi, D., Lee, M., Chu, W.-S., et al., “Microstructural Control of the Electrochromic and Ion Storage Layers on the Performance of an Electrochromic Device Fabricated by the Kinetic Spray Technique,” International Journal of Precision Engineering and Manufacturing-Green Technology, Vol. 5, No. 2, pp. 231–238, 2018.CrossRefGoogle Scholar
- 2.Kim, K., Choi, D., Kim, H., Lee, M., Chu, W., et al., “Investigation of Varying Particle Sizes of Dry-Deposited WO3 Particles in Relation to Performance of Electrochromic Cell,” International Journal of Precision Engineering and Manufacturing-Green Technology, Vol. 5, No. 3, pp. 409–414, 2018.CrossRefGoogle Scholar
- 23.Lim, S. P., Pandikumar, A., Lim, H. N., Ramaraj, R., and Huang, N. M., “Boosting Photovoltaic Performance of Dye-Sensitized Solar Cells Using Silver Nanoparticle-Decorated N,S-Co-Doped-TiO2 Photoanode,” Scientific Reports, Vol. 5, Paper No. 11922, 2015.Google Scholar
- 31.Mei, X., Cho, S. J., Fan, B., and Ouyang, J., “High-Performance Dye-Sensitized Solar Cells with Gel-Coated Binder-Free Carbon Nanotube Films as Counter Electrode,” Nanotechnology, Vol. 21, No. 39, Paper No. 395202, 2010.Google Scholar