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Issue 8, 2016
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A 9,9′-spirobi[9H-fluorene]-cored perylenediimide derivative and its application in organic solar cells as a non-fullerene acceptor

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Abstract

A structurally non-planar molecule (SBF-PDI4) with a 9,9′-spirobi[9H-fluorene] (SBF) core and four perylenediimides (PDIs) at the periphery was designed, synthesized and characterized. This compound shows a low-lying LUMO energy level of −4.11 eV, which is similar to that of PCBM, but with intensive light absorption ability in the range 450–550 nm. A high power conversion efficiency (PCE) of 5.34% was obtained for a solution processed bulk heterojunction solar cell (BHJSC) using SBF-PDI4 as the electron acceptor and a low-band gap polymer poly[[4,8-bis[5-(2-ethylhexyl)thiophene-2-yl]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7-Th) as the electron donor. These results demonstrate that PDI derivatives with a three dimensional molecular structure could serve as high performance electron acceptors in BHJSCs.

Graphical abstract: A 9,9′-spirobi[9H-fluorene]-cored perylenediimide derivative and its application in organic solar cells as a non-fullerene acceptor

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Supplementary files

Article information


Submitted
13 Oct 2015
Accepted
27 Nov 2015
First published
27 Nov 2015

Chem. Commun., 2016,52, 1649-1652
Article type
Communication
Author version available

A 9,9′-spirobi[9H-fluorene]-cored perylenediimide derivative and its application in organic solar cells as a non-fullerene acceptor

J. Yi, Y. Wang, Q. Luo, Y. Lin, H. Tan, H. Wang and C. Ma, Chem. Commun., 2016, 52, 1649
DOI: 10.1039/C5CC08484A

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