HWAHAK KONGHAK, Vol.30, No.1, 55-64, February, 1992
고분자 전해질을 이용한 텅스텐 옥사이드 박막 및 프루시안 블루 박막의 일렉트로크로믹의 표시소자
Electrochromic Display Device of Tungsten Oxide and Prussian Blue Thin Film Using Polymer Electrolyte
초록
환원 발색 물질의 텅스텐 옥사이드 박막 및 산화 발색 물질인 프루시안 블루 박막은 각각 표시전극 및 대전극으로 사용되었다. 본 연구에 사용된 고분자 전해질은 LiClO4를 함유한 PVME계와 KSCN을 함유한 PPG, PMMA이었다. 일렉트로크로믹 표시소자의 응답시간, 기억시간, 안정성, 발색 및 소색특성을 연구하였다. LiClO4ㆍPVME계와KSCNㆍPPGㆍPMMA 고분자 전해질을 XRD 관찰 결과 비정질로 나타났다. WO3/LiClO4ㆍPVME/ITO계의 토과도 범위는 WO3/KSCNㆍPPGㆍPMMA/P.B계보다 넓었다. WO3/LiClO4ㆍPVME/ITO계 및 WO3/KSCNㆍPPGㆍPMMA/P.B계는 약 Ŧ1.8V 및 ±0.5V에서 발색, 소색되었다. 가역성에 있어서는 후자가 특히 우수하였다. 기억시간의 경우 전자는 약 3일 이상 후자는 약 5시간 이상이었다.
Tungsten oxide and prussian blue thin film were used as a display electrode and a counter electrode, respectively. The polymer electrolyte used in this experiment was polyvinylmethyl-ether containing lithiium perchlorate and polypropyleneglycolㆍpolymethylate containing potassium thiocyanate. The characteristics of electrochromic display device such as response time, memory time, stability, coloration and bleach were studied. The crystalline structures of LiClO4ㆍPVME and KSCNㆍPPGㆍPMMA were found to be amorphous. Transmittance range of WO3/LiClO4ㆍPVME/ITO was broader than the of WO3/KSCNㆍPPGㆍPMMA/P.B system. The WO3/LiClO4ㆍPVME/ITO system and WO3/KSCNㆍPPGㆍPMMA/P.B system were col-ored and bleached by applying a dc electric potential of -+
1.8V and ±0.5V, respectively. The latter was superior to the former in reversibility. In the case of memory time, the former was above about 3 days, the latter was above about 5 hours.
1.8V and ±0.5V, respectively. The latter was superior to the former in reversibility. In the case of memory time, the former was above about 3 days, the latter was above about 5 hours.
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