Effect of molecular weight on the photovoltaic performance of a low band gap copolymer blended with ICBA
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Date
2013
Authors
Ibraikulov, O.
Bechara, R.
Leveque, P.
Leclerc, N.
Koishiyev, G.
Heiser, T.
Journal Title
Journal ISSN
Volume Title
Publisher
Nazarbayev University
Abstract
In this work we fabricated solar cells by combining ICBA as electron acceptor material with various weight fractions of a low band gap electron donor copolymer based on 2,1,3-benzothiadiazole, thiophene and thieno[3,2-b]thiophene units (labeled PPBzT2-CEHb), whose structure is given in Fig. 1 [1]. We investigated the influence of the polymer molecular weight and post-deposition annealing temperature on the solar device performances. Charge transport in pristine polymer films was also studied by measuring the field-effect hole mobility in bottom contact field-effect transistors (OFET).
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Keywords
first research week, solar cells, ICBA, solar device