Viologens and extended viologen derivatives with mono- and di-hexyl substituents for highly stable all-in-one ECDs and solar cell powered large-area ECDs

Sun, Fangyuan1; Zhang, He2; Wang, Cong1; Ling, Huan1; Cai, Jiayi1; Peng, Weilun1; Tian, Yanhong2; Su, Fengyu3,4; Tian, Yanqing1,5; Liu, Yan Jun4

2023-06-01

10.1016/j.matchemphys.2023.127593

MATERIALS CHEMISTRY AND PHYSICS   Impact Factor & Quartile

0254-0584

1879-3312

Viologen-based electrochromic devices (ECDs) have attracted considerable attention due to their potential ap-plications in smart windows. Herein, two viologen derivatives with N-substituted monohexyl (MHEV) and dihexyl (DHEV), and two extended viologen derivatives with a thiophene unit inserted between the bipyridine moieties and N-substituted monohexyl (m-MHEV) and dihexyl (m-DHEV) were synthesized. All-in-one ECDs were assembled using these materials. m-DHEV and m-MHEV-based ECDs exhibited red and dark orange colors, while DHEV and MHEV-based ECDs exhibited blue and magenta colors. The extended conjugation of the chromophore by the thiophene unit endowed the devices with visible-NIR absorption and excellent cyclic sta-bility. After 10000 cycles, ECDs based on m-DHEV and m-MHEV retained 94.2% and 95.0% of their initial optical contrasts, respectively. A binary chromophore mixture of DHEV and m-DHEV was used to fabricate a uniform large-area ECD (8 cm x 8 cm) with strong sunlight absorption ability. The device maintained high optical contrast (80.2% of initial state) after 2000 cycles. Furthermore, a solar cell powered ECD (8 cm x 8 cm) with negligible loss of optical contrast after 100 cycles of coloring and bleaching under sunlight was developed, demonstrating the application potential of self-powered smart windows using these materials.

Electrochromic material All-in-one electrochromic device Viologen derivative Large-area Solar cell powered

SCI

English

First ; Corresponding

Shenzhen fundamental research programs["JCYJ20180305180635082","JCYJ20200925160843002"] ; SUSTech[Y01256114] ; special fund for the Cultivation of Guangdong College Students' Scientific and Technological Innovation ("Climbing Program" Special Funds)[pdjh2022c0008]

Materials Science

Materials Science, Multidisciplinary

WOS:000955685700001

ELSEVIER SCIENCE SA

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
3.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Key Lab Energy Convers & Storage Technol, Minist Educ, Shenzhen 518055, Peoples R China

Sun, Fangyuan,Zhang, He,Wang, Cong,et al. Viologens and extended viologen derivatives with mono- and di-hexyl substituents for highly stable all-in-one ECDs and solar cell powered large-area ECDs[J]. MATERIALS CHEMISTRY AND PHYSICS,2023,301.

Sun, Fangyuan.,Zhang, He.,Wang, Cong.,Ling, Huan.,Cai, Jiayi.,...&Liu, Yan Jun.(2023).Viologens and extended viologen derivatives with mono- and di-hexyl substituents for highly stable all-in-one ECDs and solar cell powered large-area ECDs.MATERIALS CHEMISTRY AND PHYSICS,301.

Sun, Fangyuan,et al."Viologens and extended viologen derivatives with mono- and di-hexyl substituents for highly stable all-in-one ECDs and solar cell powered large-area ECDs".MATERIALS CHEMISTRY AND PHYSICS 301(2023).