Synthesis, optoelectronic and photovoltaic properties of conjugated alternating copolymers incorporating 2,1,3-benzothiadiazole or fluorenone units: a comparative study

A series of p-type alternating copolymers based on oligothiophene and fluorene electron-donating units, and fluorenone or benzothiadiazole electron-withdrawing units was synthesised viaSuzuki coupling reaction. Their optical, electrochemical and photovoltaic properties were investigated in detail al...

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Published inRSC advances Vol. 4; no. 29; pp. 15236 - 15244
Main Authors Delbosc, Nicolas, Yahya, Wan Zaireen Nisa, Lemaitre, Noeella, Berson, Solenn, Fuchs, Franz, Grevin, Benjamin, Faure-Vincent, Jerome, Travers, Jean-Pierre, Demadrille, Renaud
Format Journal Article
LanguageEnglish
Published Royal Society of Chemistry 01.01.2014
Subjects
Blends
Chemical Sciences
Copolymers
Electric power
Energy conversion efficiency
Engineering Sciences
Material chemistry
Optical properties
Organic chemistry
Photovoltaic cells
Polymer blends
Polymers
Simulation
Solar cells
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Summary:A series of p-type alternating copolymers based on oligothiophene and fluorene electron-donating units, and fluorenone or benzothiadiazole electron-withdrawing units was synthesised viaSuzuki coupling reaction. Their optical, electrochemical and photovoltaic properties were investigated in detail allowing rational rules to be drawn on the structure-property relationships. We highlight in this work the crucial role of the side solubilizing groups attached to the polymer backbones that have a significant impact on the morphology of the blends and the solar cell's power conversion efficiency. Devices with an active area of 0.28 cm super(2), based on fluorenone-copolymers and [70]PCBM blends showed V sub(oc) up to 0.95 V and Power Conversion Efficiencies (PCE) up to 1.82% under AM1.5 simulated sunlight (100 mW cm super(-2)) conditions. These values are improved compared to the ones reported to date for this class of materials.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:2046-2069
2046-2069
DOI:10.1039/c4ra00335g