ENHANCED ELECTROCHROMIC PERFORMANCE OF WO3/NiO COMPLEMENTARY DEVICE WITH MnO2 BARRIER LAYER

Min Yen Yeh, Shih Pu Yeh, Yun-Shiuan Yeh, Shun Hsyung Chang, Jin-Hau Yeh and Shiow Yueh Lee
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Min Yen Yeh: Department of Microelectronics Engineering, National Kaohsiung University of Science and Technology, No. 142, Haijhuan Road, Nanzih District, Kaohsiung 81157, Taiwan
Shih Pu Yeh: Department of Microelectronics Engineering, National Kaohsiung University of Science and Technology, No. 142, Haijhuan Road, Nanzih District, Kaohsiung 81157, Taiwan
Yun-Shiuan Yeh: ��Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
Shun Hsyung Chang: Department of Microelectronics Engineering, National Kaohsiung University of Science and Technology, No. 142, Haijhuan Road, Nanzih District, Kaohsiung 81157, Taiwan
Jin-Hau Yeh: ��School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA
Shiow Yueh Lee: �Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan

Surface Review and Letters (SRL), 2025, vol. 32, issue 07, 1-6

Abstract: This study investigates the enhancement of complementary electrochromic devices (ECDs) constructed with WO3/NiO layers by introducing a MnO2 barrier. The effects of NiO thickness and oxide layers on the electrochemical properties of the device were investigated. The device was constructed as ITO/MnO2/NiO/LiClO4-PC/WO3/ITO with LiClO4-PC as electrolyte. The response time showed a minimal increase with adding MnO2 to NiO. The device achieved 81.67% optical modulation at 550nm, with 1.80% and 83.67% transmittance in the colored and bleached states. The NiO thickness had a limited effect on the response time, with a deviation of less than 3s. MnO2-layered samples showed improved color retention, with a fade rate of 0.035% after 4h of coloring.

Keywords: Electrochromic device; tungsten oxide; nickel oxide; manganese dioxide; optical modulation (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S0218625X25400013

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