A heptacyclic carbon–oxygen-bridged ladder-type building block for A–D–A acceptors

A heptacyclic carbon–oxygen-bridged ladder-type building block for A–D–A acceptors

A heptacyclic carbon–oxygen-bridged ladder-type unit, CO i 7, was designed. Two corresponding nonfullerene acceptors, CO i 7IC and CO i 7DFIC, were developed. The single crystal structure of CO i 7IC indicates an S-shaped backbone and a packing via π–π interaction of the end groups. PTB7-Th:CO i 7DF...

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Veröffentlicht in:Materials chemistry frontiers 2018-09, Vol.2 (9), p.1716-1719
Hauptverfasser: Jin, Ke, Deng, Chenyu, Zhang, Lei, Li, Dan, Li, Ting, Wang, Feng, Yuan, Yongbo, Xiao, Zuo, Ding, Liming
Format: Artikel
Sprache:eng
Schlagworte:
Carbon
Crystal structure
Energy conversion efficiency
Photovoltaic cells
Single crystals
Solar cells
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Zusammenfassung:A heptacyclic carbon–oxygen-bridged ladder-type unit, CO i 7, was designed. Two corresponding nonfullerene acceptors, CO i 7IC and CO i 7DFIC, were developed. The single crystal structure of CO i 7IC indicates an S-shaped backbone and a packing via π–π interaction of the end groups. PTB7-Th:CO i 7DFIC solar cells gave a power conversion efficiency of 8.32%, with a decent fill factor of 71.9%.
ISSN:2052-1537
2052-1537
DOI:10.1039/C8QM00285A