Design and synthesis of thieno[3,4‐ c ]pyrrole‐4,6‐dione based conjugated copolymers for organic solar cells
Abstract
Abstract A new series of conjugated copolymers ( PBDT‐TPD , PBDT ‐Th‐ TPD , PBDT‐TT‐TPD ) containing donor–acceptor (D − A) structure electron‐rich benzo[1,2‐ b :4,5‐ b ′]dithiophene ( BDT ) units with branched alkyl thiophene side chains and electron‐deficient 5‐(2‐octyl)‐4 H ‐thieno[3,4‐ c ]pyrrole‐4,6(5 H )‐dione (TPD) units was designed and synthesized. To tune the optical and electrochemical properties of the copolymers, the conjugation length of the copolymers was extended by introducing π‐conjugated spacers such as thiophene and thieno[3,2‐ b ]thiophene units. It was observed that PBDT‐TPD showed broader absorption spectra in the longer wavelength region and the absorption maximum was red‐shifted compared to that of PBDT‐Th‐TPD, PBDT‐TT‐TPD. Stokes shifts were calculated to be 52 nm for PBDT‐TPD, 153 nm for PBDT‐Th‐TPD and 146 nm for PBDT‐TT‐TPD. Further, PBDT‐TPD exhibited a deeper highest occupied molecular orbital energy level of −5.53 eV as calculated by cyclic voltammetry. Bulk heterojunction solar cells fabricated using PBDT‐TPD as donor material exhibited a power conversion efficiency of 1.92%. © 2017 Society of Chemical Industry
- Authors:
-
- Department of Materials Engineering Indian Institute of Science Bangalore India
- Department of Materials Engineering Indian Institute of Science Bangalore India, Center for Nanoscience and Engineering Indian Institute of Science Bangalore India
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1398069
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Polymer International
- Additional Journal Information:
- Journal Name: Polymer International Journal Volume: 66 Journal Issue: 8; Journal ID: ISSN 0959-8103
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
Kotturappa, Chandrashekara G., Gopikrishna, Murali M., Rao, Arun D., and Ramamurthy, Praveen C. Design and synthesis of thieno[3,4‐ c ]pyrrole‐4,6‐dione based conjugated copolymers for organic solar cells. United Kingdom: N. p., 2017.
Web. doi:10.1002/pi.5377.
Kotturappa, Chandrashekara G., Gopikrishna, Murali M., Rao, Arun D., & Ramamurthy, Praveen C. Design and synthesis of thieno[3,4‐ c ]pyrrole‐4,6‐dione based conjugated copolymers for organic solar cells. United Kingdom. https://doi.org/10.1002/pi.5377
Kotturappa, Chandrashekara G., Gopikrishna, Murali M., Rao, Arun D., and Ramamurthy, Praveen C. Tue .
"Design and synthesis of thieno[3,4‐ c ]pyrrole‐4,6‐dione based conjugated copolymers for organic solar cells". United Kingdom. https://doi.org/10.1002/pi.5377.
@article{osti_1398069,
title = {Design and synthesis of thieno[3,4‐ c ]pyrrole‐4,6‐dione based conjugated copolymers for organic solar cells},
author = {Kotturappa, Chandrashekara G. and Gopikrishna, Murali M. and Rao, Arun D. and Ramamurthy, Praveen C.},
abstractNote = {Abstract A new series of conjugated copolymers ( PBDT‐TPD , PBDT ‐Th‐ TPD , PBDT‐TT‐TPD ) containing donor–acceptor (D − A) structure electron‐rich benzo[1,2‐ b :4,5‐ b ′]dithiophene ( BDT ) units with branched alkyl thiophene side chains and electron‐deficient 5‐(2‐octyl)‐4 H ‐thieno[3,4‐ c ]pyrrole‐4,6(5 H )‐dione (TPD) units was designed and synthesized. To tune the optical and electrochemical properties of the copolymers, the conjugation length of the copolymers was extended by introducing π‐conjugated spacers such as thiophene and thieno[3,2‐ b ]thiophene units. It was observed that PBDT‐TPD showed broader absorption spectra in the longer wavelength region and the absorption maximum was red‐shifted compared to that of PBDT‐Th‐TPD, PBDT‐TT‐TPD. Stokes shifts were calculated to be 52 nm for PBDT‐TPD, 153 nm for PBDT‐Th‐TPD and 146 nm for PBDT‐TT‐TPD. Further, PBDT‐TPD exhibited a deeper highest occupied molecular orbital energy level of −5.53 eV as calculated by cyclic voltammetry. Bulk heterojunction solar cells fabricated using PBDT‐TPD as donor material exhibited a power conversion efficiency of 1.92%. © 2017 Society of Chemical Industry},
doi = {10.1002/pi.5377},
journal = {Polymer International},
number = 8,
volume = 66,
place = {United Kingdom},
year = {Tue May 09 00:00:00 EDT 2017},
month = {Tue May 09 00:00:00 EDT 2017}
}
https://doi.org/10.1002/pi.5377
Web of Science
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