In:
Chemistry – A European Journal, Wiley, Vol. 24, No. 66 ( 2018-11-27), p. 17590-17597
Abstract:
A series of twisted N,N‐linked benzo[ ghi ]‐perylenetriimide dimers (t‐BPTI) with various lengths of the α‐branched alkyl side chain at the six‐membered imide ring position was designed, synthesized, and characterized. These compounds showed the low‐lying LUMO energy level of −3.78 eV, which was similar to that of PC 61 BM (−3.71 eV), but with intensive optical absorption in the range 350–500 nm. The twisted molecular geometry with two nearly perpendicular BPTI planes achieved a favorable nanoscale phase separation by relieving the self‐aggregation of rigid BPTI units in blend films. The acceptor t‐BPTI‐3 unit with the longest alkyl side chains has been demonstrated to be an efficient electron acceptor in solution‐processed bulk heterojunction organic photovoltaics (OPV), giving a power conversion efficiency of 3.68 % when using conjugated polymer PTB7‐Th as the donor and without additional treatments.
Type of Medium:
Online Resource
ISSN:
0947-6539
,
1521-3765
DOI:
10.1002/chem.201804088
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
1478547-X
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