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Morphological control of CuPc and its application in organic solar cells

Hsiao, Yu-Sheng and Whang, Wha-Tzong and Suen, Shich-Chang and Shiu, Jau-Ye and Chen, Chih-Ping (2008) Morphological control of CuPc and its application in organic solar cells. NANOTECHNOLOGY, 19 (41).

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Official URL: http://dx.doi.org/10.1088/0957-4484/19/41/415603

Abstract

We have prepared organic photovoltaic (OPV) cells possessing an ideal bulk heterojunction (BHJ) structure using the self-assembly of copper phthalocyanine (CuPc) as the donor material and fullerene (C-60) as the acceptor. The variable self-assembly behavior of CuPc on a diverse range of substrates (surface energies) allowed us to control the morphology of the interface and the degree of carrier transportation within the active layer. We observed rod-like CuPc structures on indium-tin oxide (ITO), poly(3,4-ethylenedioxythiophene)poly(4-styrenesulfonate) (PEDOT: PSS) and Au substrates. Accordingly, the interfaces and continuing transport path between CuPc and fullerene domains could be greatly improved due to the ideal BHJ structure. In this paper, we discuss the mechanisms of producing CuPc rod-like films on ITO, PEDOT: PSS and Au. The OPV cell performance was greatly enhanced when a mixture of horizontal and vertical CuPc rods was present on the PEDOT: PSS surfaces, i.e. the power conversion efficiency was 50 times greater than that of the corresponding device featuring a planar CuPc structure.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Technology > Nanotechnology and energy applications
ID Code:2852
Deposited By:Farnush Anwar
Deposited On:13 Jan 2009 13:56
Last Modified:26 Jan 2009 16:49

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