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Proceedings Paper

Solution processable boron subphthalocyanine derivatives as active materials for organic photovoltaics
Author(s): Biwu Ma; Yoshikazu Miyamoto; Claire H. Woo; Jean M. J. Fréchet; Fan Zhang; Yi Liu
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Paper Abstract

Here we present our work on development of new solution processable small molecules for efficient organic photovoltaic cells (OPVs). Boron subphthalocyanine derivatives possess unique structural and photophysical properties, i.e. excellent solubility, low tendency to aggregate, and high extinction coefficients, that enable the formation of high quality thin films via solution processing for OPVs application. Both p type (donor) and n type (acceptor) boron subphthalocyanine derivatives have been investigated. Using a soluble 2-Allylphenol SubPc derivative as donor and fullerene as acceptor, we have demonstrated simple planar heterojunction OPVs with power conversion efficiencies of over 1.7%, which represents one of the highest efficiencies for devices with solution processable small molecules to date. The use of fluorinated subphthalocyanines as acceptor and typical poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1, 4-phenylene vinylene] (MDMO-PPV) as donor has led to fully solution processed OPVs with efficiencies over 0.1%. Our work shows that solution processing of light harvesting small molecules has great potential for application in low cost thin film photovoltaic cells and boron subphthalocyanine derivatives are promising new-generation OPV materials.

Paper Details

Date Published: 9 October 2009
PDF: 6 pages
Proc. SPIE 7416, Organic Photovoltaics X, 74161E (9 October 2009); doi: 10.1117/12.825372
Show Author Affiliations
Biwu Ma, Lawrence Berkeley National Lab. (United States)
Yoshikazu Miyamoto, Lawrence Berkeley National Lab. (United States)
Univ. of California, Berkeley (United States)
Claire H. Woo, Univ. of California, Berkeley (United States)
Jean M. J. Fréchet, Lawrence Berkeley National Lab. (United States)
Univ. of California, Berkeley (United States)
Fan Zhang, Lawrence Berkeley National Lab. (United States)
Yi Liu, Lawrence Berkeley National Lab. (United States)

Published in SPIE Proceedings Vol. 7416:
Organic Photovoltaics X
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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