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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3283
Title: Effect of electron rich Ï€-linkers on the functional properties of dyes featuring dithieno[3,2-b:2′,3′-d]pyrrole donor
Authors: Kumar S.
Thomas K.R.J.
Li C.-T.
Fan M.-S.
Ho K.-C.
Published in: Dyes and Pigments
Abstract: In this paper, organic dyes containing dithienopyrrole (DTP) donor, linkers such as thiophene or dithienopyrrole and cyanoacrylic acid acceptor are reported. The impact of different Ï€-linkers on photophysical, electrochemical and photovoltaic properties is studied. The dyes containing dithienopyrrole linker showed improved light harvesting efficiency and reduced oxidation potentials than the thiophene analogs. The major absorption originates from the charge transfer transition, which shifts progressively to red region on increasing the number of heteroaromatic linkers. Additionally, the presence of N-fluorenyldithieonopyrrole in the conjugation bridge is beneficial to retard the charge recombination process. Therefore, the dye containing a dithienopyrrole linker showed the highest efficiency of 5.94% in the series attributable to its high JSC and VOC values. However, a dye containing two dithienopyrrole units in the conjugation pathway exhibited low power conversion efficiency irrespective of its intense absorption attributable to the low charge collection efficiency and reduced electron lifetime. © 2018 Elsevier Ltd
Citation: Dyes and Pigments (2019), 160(): 614-623
URI: https://doi.org/10.1016/j.dyepig.2018.08.035
http://repository.iitr.ac.in/handle/123456789/3283
Issue Date: 2019
Publisher: Elsevier Ltd
Keywords: Absorption spectra
Dithienopyrrole
Donor-acceptor compounds
Dye sensitized solar cells
Organic dyes
Thiophene
ISSN: 1437208
Author Scopus IDs: 57197739056
57203389297
55507636700
55179088600
56962715200
Author Affiliations: Kumar, S., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
Thomas, K.R.J., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India
Li, C.-T., Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
Fan, M.-S., Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
Ho, K.-C., Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
Funding Details: K.R.J.T. is thankful to Council of Scientific and Industrial Research , New Delhi, India for financial support (Ref. No. 02/(0230)/15/EMR-II dated 05-06-2015 ). We are thankful to DST for the purchase of ESI mass spectrometer through FIST grant to the Chemistry Department, IIT Roorkee. Appendix A
Corresponding Author: Thomas, K.R.J.; Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology RoorkeeIndia; email: krjt8fcy@iitr.ac.in
Appears in Collections:Journal Publications [CY]

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