TY - JOUR
T1 - Effect of electron-deficient linkers on the physical and photovoltaic properties of dithienopyrrole-based organic dyes
AU - Kumar, Sunil
AU - Thomas, K. R.Justin
AU - Li, Chun Ting
AU - Ho, Kuo Chuan
N1 - Funding Information:
Acknowledgements K.R.J.T. is thankful to CSIR (Ref. 02/(0230)/15/ EMR-II dated 05-06-2015), New Delhi and Department of Science and Technology (Ref. DST/TSG/PT/2013/09), New Delhi, India for financial support. S.K. acknowledges a Senior Research Fellowship from UGC, New Delhi. Financial support from DST, New Delhi for the
Publisher Copyright:
© 2017, Springer Science+Business Media, LLC.
PY - 2017/12/1
Y1 - 2017/12/1
N2 - Organic sensitizers containing dithienopyrrole donor, benzotriazole or quinoxaline in the conjugation pathway, and cyanoacrylic acid acceptor featured in a donor–acceptor-π–acceptor configuration are reported. The effect of the nature of different conjugating bridges on photophysical, electrochemical and photovoltaic properties was systematically evaluated. The incorporation auxiliary acceptors broadened the absorption spectra and modulated the excited state energy levels. The DFT calculation unraveled a significant overlap of HOMO and LUMO orbitals in benzotriazole-containing dyes and the charge transfer character for the longer wavelength absorption. Among the dyes, a dye containing benzotriazole and thiophene in the conjugation pathway exhibited highest power conversion efficiency attributable to efficient electron injection and pronounced inhibition of electron recombination.
AB - Organic sensitizers containing dithienopyrrole donor, benzotriazole or quinoxaline in the conjugation pathway, and cyanoacrylic acid acceptor featured in a donor–acceptor-π–acceptor configuration are reported. The effect of the nature of different conjugating bridges on photophysical, electrochemical and photovoltaic properties was systematically evaluated. The incorporation auxiliary acceptors broadened the absorption spectra and modulated the excited state energy levels. The DFT calculation unraveled a significant overlap of HOMO and LUMO orbitals in benzotriazole-containing dyes and the charge transfer character for the longer wavelength absorption. Among the dyes, a dye containing benzotriazole and thiophene in the conjugation pathway exhibited highest power conversion efficiency attributable to efficient electron injection and pronounced inhibition of electron recombination.
UR - http://www.scopus.com/inward/record.url?scp=85028588495&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028588495&partnerID=8YFLogxK
U2 - 10.1007/s10854-017-7787-4
DO - 10.1007/s10854-017-7787-4
M3 - Article
AN - SCOPUS:85028588495
SN - 0957-4522
VL - 28
SP - 18404
EP - 18417
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
IS - 24
ER -
