Issue 31, 2009
From the journal:

Journal of Materials Chemistry

Isomeric iminofullerenes as acceptors in bulk heterojunction organic solar cells†‡

Sung Heum Park,ab   Changduk Yang,cd   Sarah Cowan,a   Jae Kwan Lee,a   Fred Wudl,*c   Kwanghee Lee*ab  and  Alan J. Heeger*ab  

* Corresponding authors

a Center for Polymer & Organic Solids, University of California at Santa Barbara, Santa Barbara, CA, USA
E-mail: ajhe@physics.ucsb.edu

b Heeger Center for Advanced Materials, Gwangju Institute of Science & Technology (GIST), Gwangju, South Korea
E-mail: klee@gist.ac.kr

c Mitsubishi Chemical Center for Advanced Materials and Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, USA
E-mail: wudl@chem.ucsb.edu

d School of Energy Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea

Abstract

Two stable iminofullerene isomers, [5,6]-open azafulleroid (open APCBM) and [6,6]-closed aziridinofullerene (closed APCBM) enable us to scrutinize the use of these new acceptors in polymer bulk heterojunction (BHJ) solar cells and compare the effects of open trans- and closed trans-annlar subunits. When we compared the performance of both isomer devices, the poly(3-hexylthiophene)(P3HT):open APCBM device demonstrates an enhancement in photocurrent in comparison with the P3HT:closed APCBM device. From the comparative study, we attribute the enhanced current to the lower degree of symmetry of open APCBM. The alteration of fullerene structure from closed to open breaks its high degree of symmetry and consequently leads to an improved bulk heterojunction with the electron donating conjugated polymer.

Graphical abstract: Isomeric iminofullerenes as acceptors in bulk heterojunction organic solar cells

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Article information

DOI
https://doi.org/10.1039/B904535J
Article type
Paper
Submitted
05 Mar 2009
Accepted
15 May 2009
First published
22 Jun 2009

J. Mater. Chem., 2009,19, 5624-5628

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Isomeric iminofullerenes as acceptors in bulk heterojunction organic solar cells

S. H. Park, C. Yang, S. Cowan, J. K. Lee, F. Wudl, K. Lee and A. J. Heeger, J. Mater. Chem., 2009, 19, 5624 DOI: 10.1039/B904535J

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