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Thieno[3,4-b]pyrazine-Based Copolymers and Their Application in Polymer Solar Cells

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Two novel low band gap copolymers composed of benzodithiophene and thienopyrazine monomers were synthesized and applied as photoactive donor materials in bulk heterojunction (BHJ) solar cells. Polymers with donor:acceptor mole ratios of 1:1 (PBDT-TP) and 5:1 (PBDTn-TP) were prepared. The thermal, optical, and electrochemical properties of the two copolymers were investigated. Under simulated standard solar light conditions (AM 1.5G, 100 mW cm–2), the solar cell device with PBDTn-TP as a donor material provided a higher power conversion efficiency (3.58%) than the PBDT-TP polymer-based device (2.77%) and an improved open circuit voltage (V OC). The relationships between photovoltaic performance, energy levels and film morphology were investigated.
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Keywords: BENZODITHIOPHENE POLYMERS; DONOR RICH POLYMERS; ORGANIC SOLAR CELLS; THIENOPYRAZINE POLYMERS

Document Type: Research Article

Publication date: March 1, 2016

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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