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학술지 Long-lived Electrochromic Device with Multilevel Bistability based on Portable Film-type Polymer Electrolytes
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저자
아칠성, 송주희, 김태엽, 한지수, 성치훈, 조두희, 전상훈, 조성목, 류호준
발행일
202103
출처
Solar Energy Materials & Solar Cells, v.221, pp.1-7
ISSN
0927-0248
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.solmat.2020.110883
협약과제
20PB1600, 가시광선 투과도 40 % 이상 독립전원 이용이 가능한 대면적 태양광 발전 창호 개발, 류호준
초록
© 2020 Elsevier B.V. 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.
키워드
Bistability, Electrochromic device, Film type polymer electrolyte, Long-term stability
KSP 제안 키워드
Electrochromic device(ECD), Long-Term Stability, Optical and electrical properties, Polymer electrolytes, Polyvinyl acetal, Transfer method, electrical properties(I-V curve), electrochromic materials, film-type, gel electrolyte, operating voltage