Journal
APPLIED SURFACE SCIENCE
Volume 442, Issue -, Pages 78-82Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.02.141
Keywords
Electrochromism; P3HT; Long-term cyclability; Oxidation potential; Optical memory
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Funding
- National Research Foundation of Korea (NRF) grant - Ministry of Education [2015R1D1A1A01057262]
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Herein, we report the effects of applied voltage on the electrochromic (EC) stability of poly(3-hexylthiophene) (P3HT) films during EC reactions. The transmittance difference and cycling stability of these films were monitored to optimize the oxidation voltage, and their chemical compositions were analyzed by X-ray photoelectron spectroscopy after long-term electrochemical cycling. High oxidation voltages increased the color contrast of P3HT films but decreased their cycling stability due to facilitating chemical degradation. Furthermore, at an optimized oxidation voltage, the retention time during potential pulsing was adjusted utilizing the optical memory of P3HT, revealing that the decreased voltage application time reduced power consumption by 9.6% and enhanced EC stability without loss of color contrast. (C) 2018 Elsevier B.V. All rights reserved.
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