A triazoloquinoxaline and benzodithiophene bearing low band gap copolymer for electrochromic and organic photovoltaic applications

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dc.authorid0000-0003-2212-199X
dc.contributor.authorÖzdemir Hacıoğlu, Şerife
dc.contributor.authorAkbaşoğlu Ünlü, Naime
dc.contributor.authorAktaş, Ece
dc.contributor.authorHizalan, Gönül
dc.contributor.authorYıldız, Dilber Esra
dc.contributor.authorÇırpan, Ali
dc.contributor.authorToppare, Levent Kamil
dc.date.accessioned2019-05-13T08:57:28Z
dc.date.available2019-05-13T08:57:28Z
dc.date.issued2017
dc.departmentHitit Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü
dc.description.abstractA new triazoloquinoxaline and benzodithiophene based copolymer was synthesized to investigate its electrochemical, optical and photovoltaic behaviors. According to the polymer design, combination of two acceptor units (benzotriazole and quinoxaline) which contribute imine bonds to the structure and a triazoloquinoxaline unit for enhancing electron accepting ability was pursued. As a result of electrochemical studies, the copolymer PTQBDT has a low lying HOMO energy level as ?5.23 eV which increases the chemical stability of the resulting polymer and leads to a higher Voc. In addition, the copolymer has an ambipolar character with two well-defined redox couples in the n-doped state and multichromic behavior. In the context of optical studies, PTQBDT has wide absorption range in the visible region with a tail in the NIR region, which yields a low band gap of 1.20 eV. Organic photovoltaic devices were designed using PTQBDT (the electron donor) and PC71BM (the electron acceptor) for the preliminary studies. The resulting device exhibits a power conversion efficiency of 2.0% with a current density of 8.07 mA cm?2, an open-circuit voltage of 0.45 V, and a fill factor of 55%. The carrier mobility of the PTQBDT was calculated as 3.00 × 10?3 cm2 V?1 s?1 via space-charge-limited current (SCLC) method.
dc.identifier.citationÖzdemir Hacıoğlu, Ş, Akbaşoğlu Ünlü, N., Aktaş, E., Hizalan, G., Yıldız, D. E., Çırpan, A., Toppare, L. (2017). A triazoloquinoxaline and benzodithiophene bearing low band gap copolymer for electrochromic and organic photovoltaic applications. Synthetic Metals, 228, 111-119.
dc.identifier.doi10.1016/j.synthmet.2017.04.017
dc.identifier.endpage119en_US
dc.identifier.issn0379-6779
dc.identifier.scopusqualityQ1
dc.identifier.startpage111en_US
dc.identifier.urihttps://doi.org/10.1016/j.synthmet.2017.04.017
dc.identifier.urihttps://hdl.handle.net/11491/936
dc.identifier.volume228en_US
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Ltd
dc.relation.ispartofSynthetic Metals
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectBenzodithiopheneen_US
dc.subjectConjugated Polymersen_US
dc.subjectCopolymeren_US
dc.subjectOrganic Solar Cellen_US
dc.subjectTriazoloquinoxalineen_US
dc.titleA triazoloquinoxaline and benzodithiophene bearing low band gap copolymer for electrochromic and organic photovoltaic applications
dc.typeArticle

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