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Journal Article
Long-lived Electrochromic Device with Multilevel Bistability based on Portable Film-type Polymer Electrolytes
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- Authors
- Chil Seong Ah, Juhee Song, Tae-Youb Kim, Jisu Han, Chihun Sung, Doo-Hee Cho, Sanghoon Cheon, Seong M. Cho, Hojun Ryu
- Issue Date
- 2021-03
- Citation
- Solar Energy Materials & Solar Cells, v.221, pp.1-7
- ISSN
- 0927-0248
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- Long-lived electrochromic devices (ECDs) with multilevel bistability based on a portable film-type polymer electrolyte (PFPE) were fabricated and their optical and electrical properties were characterized. WO3 and NiOx, deposited via a vacuum method, were used as electrochromic materials, and PFPEs were assembled in ECDs by a transfer method. The PFPEs were fabricated by inserting a polyvinyl acetal (PVA) based gel electrolyte between a light and a tight release films. The PFPE-based ECD operated reliably for at least 109,000 cycles and showed excellent bistability in multilevel open circuits. For 30 min after removing the applied operating voltage, the ECD maintained 90% and 99% of the original coloration and decoloration transmittance at 550 nm, respectively. The average coloration and decoloration consumed charge and efficiency over 109,000 operation cycles were 4.2 and ?닋4.5 mC/cm2 and 81.4 and ?닋74.8 cm2/C, respectively.
- KSP Keywords
- Electrochromic materials, Gel electrolyte, Operating Voltage, Optical and electrical properties, Polymer electrolytes, Polyvinyl acetal, Transfer method, electrochromic devices, film-type