Conjugated polymers with benzothiadiazole and benzotriazole moieties for polymer solar cells

Date

2019-08-01

Author

Keles, Duygu
Erer, Mert Can
Bolayir, Eda
CEVHER, ŞEVKİ CAN
Hizalan, Gonul
Toppare, Levent Kamil
Çırpan, Ali

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In this study four novel random polymers, comprising benzothiadiazole and benzotriazole as the accepting units and benzodithiophene as the donor unit, were synthesized via Stille polymerization reaction. Moreover, effects of fluorine atom and pi bridges on optical, electrochemical and optoelectronic properties were investigated. Optical band gap values of P1, P2, P3 and P4 were found as 1.78 eV, 1.72 eV, 1.63 eV and 1.73 eV, respectively. Characterization of polymers via IJV Vis NIR spectroscopy, cyclic voltammetry (CV), gel permeation chromatography (GPC) and thermal analysis were carried out. Polymer solar cells (PSCs) were constructed and characterized in N-2 filled glove box. While the polymers act as electron donors, PC71BM was the electron acceptor in the PSCs with the device structure of ITO/PEDOT:PSS/Polymer:PC71BM/LiF/Al. As a consequence of measurements under standard AM 1.5 G illumination (100 mW/cm(2)), the highest power conversion efficiency values were recorded as 4.10% 3.84%, 1.60% and 3.83% for P1, P2, P3 and P4 based PSCs, respectively.

Subject Keywords

Renewable Energy, Sustainability and the Environment

URI

https://hdl.handle.net/11511/38493

Journal

RENEWABLE ENERGY

DOI

https://doi.org/10.1016/j.renene.2019.03.018

Collections

Department of Chemistry, Article

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Citation Formats

D. Keles et al., “Conjugated polymers with benzothiadiazole and benzotriazole moieties for polymer solar cells,” RENEWABLE ENERGY, pp. 1184–1193, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38493.