Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 24, Pages 8834-8837Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja404064m
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Funding
- MEXT [24685030, 23245041]
- Strategic Promotion of Innovative Research and Development from JST
- NEDO
- Grants-in-Aid for Scientific Research [24685030, 23245041] Funding Source: KAKEN
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We show that rational functionalization of the naphthodithiophene core in copolymers based on naphthodithiophene and naphthobisthiadiazole improves the solubility without an alteration of the electronic structure. Surprisingly, the introduction of linear alkyl chains brings about a drastic change in polymer orientation into the face-on motif, which is beneficial for the charge transport in solar cells. As a result, the present polymers exhibit high power conversion efficiencies of up to similar to 8.2% in conventional single-junction solar cells.
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