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Polymers 2017, 9(11), 578; https://doi.org/10.3390/polym9110578

Wide Band Gap Polymer Based on Indacenodithiophene and Acenaphthoquinoxaline for Efficient Polymer Solar Cells Application

1
School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
2
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
*
Authors to whom correspondence should be addressed.
Received: 9 September 2017 / Revised: 26 October 2017 / Accepted: 31 October 2017 / Published: 7 November 2017
(This article belongs to the Special Issue Conjugated Polymers 2016)
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Abstract

A new wide band gap polymer PIDT-AQx with indacenodithiophene (IDT) as the electron-rich unit and acenaphthoquinoxaline (AQx) as the electron-deficient unit has been designed and synthesized. The optical band gap of PIDT-AQx was 1.81 eV with a HOMO energy level of −5.13 eV. Polymer solar cells with the blend of PIDT-AQx/PC71BM as the active layer achieved a power conversion efficiency (PCE) of 4.56%, with an open-circuit voltage (Voc) of 0.84 V, a current density (Jsc) of 9.88 mA cm−2, and a fill factor (FF) of 55% without any solvent additives and pre- or post-treatments. The photovoltaic performance of PIDT-AQx could be slightly improved with a PCE up to 4.78% after thermal annealing due to enhanced Jsc. The results indicate that acenaphthoquinoxaline is a promising building block for developing conjugated polymers for efficient solar cells application. View Full-Text
Keywords: indacenodithiophene; acenaphthoquinoxaline; conjugated polymer; polymer solar cells indacenodithiophene; acenaphthoquinoxaline; conjugated polymer; polymer solar cells
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Liu, M.; Liu, Z.; Zhang, Y.; Zhao, L. Wide Band Gap Polymer Based on Indacenodithiophene and Acenaphthoquinoxaline for Efficient Polymer Solar Cells Application. Polymers 2017, 9, 578.

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