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. 130 138-143

Ämneskategorier

Polymerkemi

Styrkeområden

Nanovetenskap och nanoteknik

Energi

Materialvetenskap

DOI

10.1016/j.solmat.2014.06.041