Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 8, Issue 36, Pages 12656-12661Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tc03008b
Keywords
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Funding
- Advanced Research Center for Green Materials Science and Technology from The Featured Area Research Center Program within Ministry of Education [109L9006]
- Ministry of Science and Technology in Taiwan [MOST 109-2634-F-002-042, 107-2113-M-002-024-MY3, 107-2221-E-002-066-MY3]
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In this work, we studied the novel redox-active materialN,N,N ',N '-tetrakis(4-methoxyphenyl)-1,1 '-biphenyl-4,4 '-diamine (TPB) and found it to exhibit the crucial optical characteristics of high PL quantum yields both in solution (phi(PL)= 34.5%) and solid (phi(PL)= 32.4%) states. This unique PL characteristic was key for fabricating liquid-type and gel-type electrochemical devices displaying high-performance electrochromic (EC) and electrofluorochromic (EFC) behaviours at the same time. All of the obtained devices based onTPBexhibited excellent EFC performance, including rapid switching response times, unprecedented PL intensity contrast ratio (I-off/I-on) values of up to 374 (the highest value reported to the best of our knowledge), and remarkable levels of electrochemical stability. In addition, these devices could, without UV irradiation, be transformed between being highly transparent and colourless devices and being truly black ones through switching between their original and oxidative states.
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