Novel Black Electrochromic System Based on Urea-imidazolium Salts

doi:10.7503/cjcu20230226

Abstract

Abstract:

Electrochromic（EC） materials have applications in smart windows， anti-glare rearview mirrors， reflective displays， etc. However， the performances of EC materials， such as their response speed and stability， are still not ideal. Thus， developing EC systems with high stability and fast optical switching speed is currently a serious challenge. In this paper， based on the proton-coupled electron transfer mechanism and the reversible “electroacid/base” method， we introduced imidazole-based ion-conducting structures with high ion conductivity and stability into urea-containing “electrochroacid”， and combined them with 2-anilino-6-dibutylamino-3-methylfluoran （ODB-2） to design and construct a novel black EC system. This newly developed system combines the advantages of ion- conducting materials and electrochromic materials. Under a suitable electric field， the color can be stably and reversibly switched between colorless and black. This paper provides a new approach for developing stable EC systems， which can help promote the application of EC materials.

Key words: Black electrochromic system, Ionic conductvity, Electroacid/base, Urea-imidazolium salt

CLC Number:

O626

TrendMD:

HUANG Zhikang, WANG Tongtong, CHEN Yujing, HUANG Shiyu, WANG Jiajia, GUO Junnian, YU Yang. Novel Black Electrochromic System Based on Urea-imidazolium Salts[J]. Chem. J. Chinese Universities, 2023, 44(11): 20230226.

Figures/Tables 8

References 24

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