Photovoltaic Properties of Poly(TriphenylamineThiazolo[5,4-d] Thiazole) Copolymer Dye in BulkHetorojunction Organic Solar Cells

By : Ugursoy Olgun, Mustafa Gulfen, Gonul Hizalan, Ali Cirpan, Levent Toppare

Page No: 391-403

Abstract
In this study, the photovoltaic properties of poly(triphenylamine-thiazolo[5,4-d]thiazole) alternating copolymer dye in bulk heterojunction polymer solar cells were examined. The copolymer is a red colored dye material with high thermal stability, good solubility and low-band gap energy. The band gap energy of the polymer was determined as 1.36 eV. The conductivity of the polymer thin film was measured as 1.5x10-5 S/cm. The polymer solar cells were fabricated using the different ratios of the blends of the polymer and [6,6]-phenyl-C71-butyric acid methyl ester and their photovoltaic properties were investigated. The optimum polymer solar cell yielded the short circuit current of 4.10 mA/cm2, the open-circuit voltage of 0.47 V, the fill factor of 29% and the power conversion efficiency of 0.55%. The polymer solar cell showed the maximum incident photon to current efficiency of 14.5% at 470 nm. The copolymer can be considered as a promising solar cell dye material.

Authors :
Ugursoy Olgun and Mustafa Gulfen : Department of Chemistry, Sakarya University, 54187, Sakarya, Turkey
Gonul Hizalan, Ali Cirpan and levent Toppare : Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey