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Semiconducting Copolymers Based on meso-Substituted BODIPY for Inverted Organic Solar Cells and Field-Effect Transistors

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info:eu-repo/semantics/openAccess

Date

2018

Author

Ozdemir, Mehmet
Kim, Sang Woo
Kim, Hyungsug
Kim, Myung-Gil
Kim, Bumjoon J.
Kim, Choongik
Usta, Hakan

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Abstract

The synthesis, physicochemical, and optoelectronic properties of a new class of low band-gap (?1.3 eV) donor–acceptor copolymers based on a highly electron-deficient meso-5-(2-octyldodecyl)thiophene-substituted BODIPY ?-unit are presented. The polymeric solutions exhibit strong aggregation-dependent excitonic properties indicating the presence of enhanced ?-coherence as a result of strong interchain interactions. The polymeric semiconductor thin films prepared by spin coating show isotropic nodule-like grains with essentially no ordering in the out-of-plane direction. Field-effect hole mobilities of 0.005 cm2 V-1·s-1 are observed in bottom-gate top-contact organic field-effect transistors, and inverted bulk-heterojunction organic photovoltaics employing the polymer:PC71BM active layer exhibit excellent power conversion efficiencies of 6.2% with a short-circuit current of 16.6 mA cm-2. As far as it is known, this is a record high value achieved to date for a boron-containing donor polymer in the photovoltaic literature indicating a significant enhancement in power conversion efficiency (>3–4 times). The findings clearly present that rationally designed BODIPY-based donor–acceptor copolymers can be a key player in photovoltaic applications.

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http://acikerisim.agu.edu.tr/xmlui/handle/20.500.12573/17

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  • Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü Koleksiyonu [81]
  • Scopus İndeksli Yayınlar Koleksiyonu [136]
  • WoS İndeksli Yayınlar Koleksiyonu [153]



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