Improving the Performances of Random Copolymer Based Organic Solar Cells by Adjusting the Film Features of Active Layers Using Mixed SolventsReportar como inadecuado




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1

National Center for Nanoscience and Technology, Beijing 100190, China

2

Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, China



These authors contributed equally to this work.





*

Authors to whom correspondence should be addressed.



Academic Editor: Scott M. Husson

Abstract A novel random copolymer based on donor–acceptor type polymers containing benzodithiophene and dithienosilole as donors and benzothiazole and diketopyrrolopyrrole as acceptors was designed and synthesized by Stille copolymerization, and their optical, electrochemical, charge transport, and photovoltaic properties were investigated. This copolymer with high molecular weight exhibited broad and strong absorption covering the spectra range from 500 to 800 nm with absorption maxima at around 750 nm, which would be very conducive to obtaining large short-circuits current densities. Unlike the general approach using single solvent to prepare the active layer film, mixed solvents were introduced to change the film feature and improve the morphology of the active layer, which lead to a significant improvement of the power conversion efficiency. These results indicate that constructing random copolymer with multiple donor and acceptor monomers and choosing proper mixed solvents to change the characteristics of the film is a very promising way for manufacturing organic solar cells with large current density and high power conversion efficiency. View Full-Text

Keywords: random copolymer; photovoltaic; mixed solvents; film feature random copolymer; photovoltaic; mixed solvents; film feature





Autor: Xiangwei Zhu 1,†, Kun Lu 1,†, Benzheng Xia 1, Jin Fang 1, Yifan Zhao 1, Tianyi Zhao 2,* , Zhixiang Wei 1,* and Lei Jiang 2,*

Fuente: http://mdpi.com/



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