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 in | RSC advances Vol. 4; no. 29; pp. 15236 - 15244 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Royal Society of Chemistry
01.01.2014
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Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 2046-2069 2046-2069 |
DOI: | 10.1039/c4ra00335g |