Stability study of quinoxaline and pyrido pyrazine based co-polymers for solar cell applications
Artikel i vetenskaplig tidskrift, 2014
We present two co-polymer families; one based on a thiophene-quinoxaline unit and one on a thiophene-pyrido pyrazine unit. Co-polymerization of these monomers with thiophene-hexylthiophene was performed to create polymers with an optical absorption that fully covers the visible part of the solar spectrum with the aim to enhance the solar cell performances of these polymers. We have also studied how increasing the fraction of thiophene-hexylthiophene affects the photo-oxidative stability of these polymers. Thiophene-pyrido pyrazine solar cells displayed increased device efficiency upon addition of the thiophene-hexylthiophene and, in addition, the stability is retained upon inclusion of these units. In contrast, we found that for the thiophene-quinoxaline based co-polymer, both device efficiency and stability decreased with increasing thiophene-hexylthiophene fraction. Moreover, our results indicate that the photo-oxidative stability of the thiophene-quinoxaline co-polymer is independent of the polymer molecular weight as well as of the film thickness.
Conjugated polymers
Photo-oxidative stability
UV-vis spectroscopy
Polymer solar cells
Författare
Patrik Henriksson
Chalmers, Kemi- och bioteknik, Polymerteknologi
Camilla Lindqvist
Chalmers, Kemi- och bioteknik, Polymerteknologi
Bedasa Abdisa
Linköpings universitet
Addis Ababa University
Ergang Wang
Chalmers, Kemi- och bioteknik, Polymerteknologi
Zandra George
Chalmers, Kemi- och bioteknik, Polymerteknologi
Renee Kroon
Chalmers, Kemi- och bioteknik, Polymerteknologi
Christian Müller
Chalmers, Kemi- och bioteknik, Polymerteknologi
T. Yohannes
Addis Ababa University
Olle Inganäs
Linköpings universitet
Mats Andersson
Chalmers, Kemi- och bioteknik, Polymerteknologi
Solar Energy Materials and Solar Cells
0927-0248 (ISSN)
Vol. 130 138-143Ämneskategorier
Polymerkemi
Styrkeområden
Nanovetenskap och nanoteknik
Energi
Materialvetenskap
DOI
10.1016/j.solmat.2014.06.041