화학공학소재연구정보센터
Solar Energy Materials and Solar Cells, Vol.155, 378-386, 2016
Solubilized 5,6-bis(octyloxy)benzoxadiazole as a versatile acceptor block for designing novel (-X-DADAD-)(n) and (-X-DADADAD-)(n) electron donor copolymers for bulk heterojunction organic solar cells
Three novel conjugated polymers incorporating extended DADAD and DADADAD building blocks with the 5,6-bisalkoxybenzoxadiazole acceptor (A) and the electron donor (D) thiophene units were synthesized and fully characterized. The application of the benzoxadiazole instead of benzothiadiazole resulted in a significant increase in the open circuit voltage of organic solar cells based on such polymers. The best performing material delivered a decent solar light power conversion efficiency of 5.5% in organic bulk heterojunction solar cells using PC71BM as an electron acceptor component. The obtained results revealed a high potential of using different acceptor building blocks in the design of novel (-X-DADAD-)(n) polymers with tailored optoelectronic and photovoltaic properties. (C) 2016 Elsevier B.V. All rights reserved.