期刊
POLYMERS
卷 14, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/polym14061175
关键词
electrosynthesis; redox process; color-bleach kinetics; electrochromic device; electrochemical redox stability
资金
- Ministry of Science and Technology of the Republic of China [110-2221-E-992-051, 108-2221-E-224-049-MY3]
In this study, four different polymers were synthesized and their spectral and electrochromic switching performances were characterized, demonstrating their promising application prospects.
Four 1,4-bis((9H-carbazol-9-yl)methyl)benzene-containing polymers (PbCmB, P(bCmB-co-bTP), P(bCmB-co-dbBT), and P(bCmB-co-TF)) were electrosynthesized onto ITO transparent conductive glass and their spectral and electrochromic switching performances were characterized. The PbCmB film displayed four types of color variations (bright gray, dark gray, dark khaki, and dark olive green) from 0.0 to 1.2 V. P(bCmB-co-bTP) displayed a high transmittance variation ( increment T = 39.56% at 685 nm) and a satisfactory coloration efficiency (eta = 160.5 cm(2)center dot C-1 at 685 nm). Dual-layer organic electrochromic devices (ECDs) were built using four bCmB-containing polycarbazoles and poly(3,4-ethylenedioxythiophene) (PEDOT) as anodes and a cathode, respectively. PbCmB/PEDOT ECD displayed gainsboro, dark gray, and bright slate gray colors at -0.4 V, 1.0 V, and 2.0 V, respectively. The P(bCmB-co-bTP)/PEDOT ECD showed a high increment T (40.7% at 635 nm) and a high coloration efficiency (eta = 428.4 cm(2)center dot C-1 at 635 nm). The polycarbazole/PEDOT ECDs exhibited moderate open circuit memories and electrochemical redox stability. The characterized electrochromic properties depicted that the as-prepared polycarbazoles had a satisfactory application prospect as an electrode for the ECDs.
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