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Open Access Ternary blend bulk heterojunction polymer solar cells based on double donors and single acceptor with ultra wideband absorption

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We demonstrated the simple device configuration and low-cost processing technology of single-junction BHJ cells while inheriting the major benefit of incorporating multiple polymers in tandem cells. Ternary blend bulk heterojunction (BHJ) solar cells with high-band-gap PBDTTPD and low-band-gap PC20 BDTDPP as donor polymers, with phenyl-C61-butyric acid methyl ester (PC61 BM) as acceptor were studied. In this ternary blend BHJ, free charge carriers travel through their corresponding donor-polymer-linked channels and fullerene-enriched domain to the electrodes, and the ternary blend BHJ solar cells showed power conversion efficiencies of up to 5.16%. This added to the growing evidence that the use of ternary blends is a general and effective strategy for producing efficient organic photovoltaics manufactured in a single active-layer processing step.

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Keywords: BENZODITHIOPHENE; DIKETOPYRROLOPYRROLE; LOW BAND GAP POLYMER; TERNARY BLEND BULK HETEROJUNCTION; THIENOPYRROLEDIONE

Document Type: Research Article

Publication date: December 1, 2015

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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