High-performance and reliable single-layer electrochromic devices by high-voltage pulse-assisted operation
발표자
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초록
내용
A single-layer electrochromic device (SL-ECD) based on ionic conductors containing EC chromophores provides a very simple platform. The operation of SL-ECDs is governed by the diffusion of redox species due to their SL structure, which causes a relatively slow dynamic response. In this study, we propose an effective high-voltage-pulse injection strategy to improve the performance of SL-ECDs. Applying high-voltage pulses promotes coloration/bleaching switching without degrading device stability, which is more advantageous than applying high DC voltages. The coloration/bleaching dynamic responses with the optimized voltage wave are ~62% and ~20% faster than the simple DC input. Furthermore, the additionally injected pulse aids in increasing the coloration efficiency from ~95.3 cm2 C−1 to ~168.6 cm2 C−1 and the device operates stably. The concept of high-voltage pulse-assisted operation of SL-ECDs is a straightforward but effective method for improving device performance.