Jump to main content
Jump to site search


Photovoltaic properties of novel thiophene- and selenophene-based conjugated low bandgap polymers: a comparative study

Author affiliations

Abstract

In this study, we investigated the photovoltaic properties of newly synthesized low bandgap conjugated polymers, poly(4-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophen-2-yl)-8-(5-(2,6-didodecylbenzo[1,2-d:4,5-d′]bis(thiazole)-4-yl)thiophen-2-yl)-2,6-didodecylbenzo[1,2-d:4,5-d′]bis(thiazole)) (P1) and poly(4-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophen-2-yl)-8-(5-(2,6-didodecylbenzo[1,2-d:4,5-d′]bis(thiazole)-4-yl)selenophen-2-yl)-2,6-didodecylbenzo[1,2-d:4,5-d′]bis(thiazole)) (P2). P1 is a thiophene-based conjugated polymer (TCP), and P2 is a selenophene-based conjugated polymer (SCP). These two different conjugated low bandgap polymers were characterized by NMR and gel permeation chromatography. The physical properties of the polymers were studied by thermogravimetric analysis and conductivity. Moreover, we also investigated the optical, electrochemical and morphological properties of both polymers by UV-vis spectroscopy, cyclic voltammetry and atomic-force microscopy (AFM), respectively. Later, we studied the photovoltaic properties of both low bandgap polymers blended with PC61BM in different ratios with different thicknesses. In addition, post thermal annealing at different temperatures for both polymers was investigated, and the results show that P2 (SCP) exhibited stronger molecular orientation properties as compared to P1 (TCP).

Graphical abstract: Photovoltaic properties of novel thiophene- and selenophene-based conjugated low bandgap polymers: a comparative study

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Jan 2017, accepted on 30 May 2017 and first published on 31 May 2017


Article type: Paper
DOI: 10.1039/C7NJ00151G
Citation: New J. Chem., 2017, Advance Article
  •   Request permissions

    Photovoltaic properties of novel thiophene- and selenophene-based conjugated low bandgap polymers: a comparative study

    Y. N. Lee, P. Attri, S. S. Kim, S. J. Lee, J. H. Kim, T. J. Cho and I. T. Kim, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ00151G

Search articles by author

Spotlight

Advertisements