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Insertion of a naphthalenediimide unit in a metal-free donor-acceptor organic sensitizer for efficiency enhancement of a dye-sensitized solar cell

Bobe, Sharad R., Gupta, Akhil, Rananaware, Anushri, Bilic, Ante, Xiang, Wanchun, Li, Jingliang, Bhosale, Sheshanath V., Bhosale, Sidhanath V. and Bhosale, Richard A. 2016, Insertion of a naphthalenediimide unit in a metal-free donor-acceptor organic sensitizer for efficiency enhancement of a dye-sensitized solar cell, Dyes and pigments, vol. 134, pp. 83-90, doi: 10.1016/j.dyepig.2016.06.038.

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Title Insertion of a naphthalenediimide unit in a metal-free donor-acceptor organic sensitizer for efficiency enhancement of a dye-sensitized solar cell
Author(s) Bobe, Sharad R.
Gupta, AkhilORCID iD for Gupta, Akhil orcid.org/0000-0002-1257-8104
Rananaware, Anushri
Bilic, Ante
Xiang, Wanchun
Li, JingliangORCID iD for Li, Jingliang orcid.org/0000-0003-0709-2246
Bhosale, Sheshanath V.
Bhosale, Sidhanath V.
Bhosale, Richard A.
Journal name Dyes and pigments
Volume number 134
Start page 83
End page 90
Total pages 8
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-11
ISSN 1873-3743
Keyword(s) Science & Technology
Physical Sciences
Technology
Chemistry, Applied
Engineering, Chemical
Materials Science, Textiles
Chemistry
Engineering
Materials Science
Dye-sensitized solar cells
Donor-pi-acceptor
Naphthalenediimide
Organic sensitizers
Triphenylamine
Cobalt-mediated electrolyte
Summary Through the use of a planar conjugated naphthalenediimide (NDI) functionality, a novel, metal-free organic chromophore was designed, synthesized and characterized for application in dye-sensitized solar cells (DSSCs). The new sensitizer, 2-cyano-3-(5-(9-(5-(4-(diphenylamino)phenyl)thiophen-2-yl)-2,7-dioctyl-1,3,6,8-tetraoxo-1,2,3,6,7,8-hexahydrobenzo[lmn] [3,8]phenanthrolin-4-yl)thiophen-2-yl)acrylic acid (coded as A1), was based on a donor–π-bridge–acceptor (D–π–A) module where a simple triphenylamine functionality served as an electron donor, a cyanoacrylic acid as an electron acceptor and anchoring group, and a NDI moiety as the π-bridge embedded between the two thiophene units. Because of the extensively conjugated NDI unit, the new dye A1 exhibited high extinction coefficient, tuned energy levels and improved DSSC performance when compared with DSSCs fabricated using the conventional sensitizer, 2-cyano-3-(5’-(4-(diphenylamino)phenyl)-[2,2’-bithiophen]-5-yl)acrylic acid (R1). Furthermore, DSSCs that were constructed using A1 showed an increase in electron lifetime when compared with DSSCs fabricated using R1. A1 demonstrated its suitability with a variety of electrolyte systems and DSSC power conversion efficiencies of 6.24%, 6.05% and 5.17% were recorded using cobalt-, solvent- and ionic liquid-based redox shuttles. To our knowledge, A1 is the first reported example in the literature where NDI unit has been embedded between thiophene functionalities to extend the π-conjugation in a given D–A system for DSSC applications.
Language eng
DOI 10.1016/j.dyepig.2016.06.038
Field of Research 0904 Chemical Engineering
Socio Economic Objective 0 Not Applicable
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084886

Document type: Journal Article
Collection: Institute for Frontier Materials
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