|Title:||Synthesis, characterization and electroluminescence of carbazole-benzimidazole hybrids with thiophene/phenyl linker|
Justin Thomas, K. R.
|Published in:||Dyes and Pigments|
|Abstract:||New organic luminescent materials containing carbazole and benzimidazole chromophores were synthesized by tethering them together using thiophene or phenyl spacer. Both 3,6- and 2,7-disubstitutions were explored. The functional properties of the new materials were analyzed by photophysical, electrochemical, thermal and electroluminescence properties. The thiophene containing dyes showed red-shifted absorption and emission profiles than that of the phenyl analogs due to effective electronic delocalization in the former. Also, the thiophene-based dyes exhibited low oxidation potentials than that of the phenyl analogs attributable to electron richness. Electroluminescence devices were fabricated using these dyes as emitting layer or dopant in a multi-layered configuration. The devices containing thiophene-based dyes showed relatively low turn-on voltage in the neat devices due to the favorable alignment of energy levels, which facilitated balanced charge transport. A thiophene-based dye exhibited better performance in the series with external quantum efficiency as high as 1.5%. Â© 2016 Elsevier Ltd.|
|Citation:||Dyes and Pigments (2016), 133(): 132-142|
|Author Scopus IDs:||57195605812|
|Author Affiliations:||Karthik, D., Organic Materials Chemistry, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India|
Thomas, K.R.J., Organic Materials Chemistry, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Jou, J.-H., Department of Material Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
Chen, Y.-L., Department of Material Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
|Funding Details:||Financial support from CSIR (Ref.Â No. 02/(0230)/15/EMR-II dated 05-06-2015), New Delhi to KRJT is gratefully acknowledged and DST for HRMS facility via FIST Program to the Chemistry Department. DK thanks UGC , New Delhi for research fellowship. Appendix A|
|Corresponding Author:||Thomas, K.R.J.; Organic Materials Chemistry, Department of Chemistry, Indian Institute of Technology RoorkeeIndia; email: email@example.com|
|Appears in Collections:||Journal Publications [CY]|
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