Effect of thiophene, 3-hexylthiophene, selenophene, and Thieno[3,2-b]thiophene spacers on OPV device performance of novel 2,1,3-benzothiadiazole based alternating copolymers
AuthorKaraman, Cansu Zeytun
Hacıoğlu, Şerife Özdemir
Aslan, Sultan Taşkaya
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CitationKaraman, C.Z., Göker, S., Şahin, Ü., Hacioglu, S.O., Aslan, S.T., Hacıefendioğlu, T., Hizalan, G., Yıldırım, E., Çırpan, A., Toppare, L. (2021). Effect of thiophene, 3-hexylthiophene, selenophene, and Thieno[3,2-b]thiophene spacers on OPV device performance of novel 2,1,3-benzothiadiazole based alternating copolymers. Journal of Electroanalytical Chemistry, 895, art. no. 115483. https://doi.org/10.1016/j.jelechem.2021.115483
Four novel alternating copolymers bearing 5-fluoro-6-((2-octyldodecyl)oxy)benzo[c][1,2,5]thiadiazole as a strong acceptor unit and 9,9-dioctylfluorene as a strong donor unit with bridging units namely, thienothiophene, selenophene, 3-hexylthiophene, and thiophene were designed and synthesized. The polymers were characterized via 1H NMR spectroscopy, and weight average molecular weights were reported via gel permeation chromatography (GPC). For synthesized novel polymers, the bulk heterojunction solar cells were constructed. Besides, the effects of bridging units on electronic, optical, photovoltaic, and morphological properties were investigated. Among the polymers, the thienothiophene containing polymer P1 exhibited the highest PCE as 4.25% under the illumination of AM 1.5 G with 100 mW/cm2.