Issue 18, 2013

Efficient and thermally stable polymer solar cells based on a 54π-electron fullerene acceptor

Abstract

A 54π-electron fullerene acceptor, bis-thieno-o-quinodimethane-methano[60]fullerene (bis-TOQMF), featuring a compact –CH2– addend and two thieno-o-quinodimethane addends, has been developed. Bis-TOQMF possesses good solubility and a high LUMO level of −3.40 eV. Polymer solar cells based on bis-TOQMF/P3HT show not only high Voc (0.94 V) but also good Jsc (8.09 mA cm−2) and FF (58%). The highest PCE of 4.56% has been achieved for 54π-electron fullerene solar cells to date. On the contrary, a 54π-electron analogue of bis-TOQMF, tris-thieno-o-quinodimethane-C60 (tris-TOQC), shows low performance. 1.02% PCE was obtained for tris-TOQC/P3HT solar cells, with high Voc (0.96 V) but much lower Jsc (2.85 mA cm−2) and FF (35%). Space charge limited current (SCLC) measurements indicate that the electron mobility of bis-TOQMF is 10 times higher than that of tris-TOQC. Bis-TOQMF/P3HT solar cells show higher thermal stability than PC61BM/P3HT solar cells.

Graphical abstract: Efficient and thermally stable polymer solar cells based on a 54π-electron fullerene acceptor

Supplementary files

Article information

Article type
Paper
Submitted
16 Jan 2013
Accepted
05 Mar 2013
First published
05 Mar 2013

J. Mater. Chem. A, 2013,1, 5562-5566

Efficient and thermally stable polymer solar cells based on a 54π-electron fullerene acceptor

S. Chen, G. Ye, Z. Xiao and L. Ding, J. Mater. Chem. A, 2013, 1, 5562 DOI: 10.1039/C3TA10231A

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