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Proceedings Paper

Modelling of external quantum efficiency spectra as a function of varying P3OT thickness in P3OT-C60 polymer photovoltaic devices
Author(s): A. Gopal; M. Drees; R. M. Davis; J. R. Heflin
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Paper Abstract

In this paper we present a study of thermally interdiffused poly (3-octylthiophene) (P3OT) - C60 photovoltaic devices of varying polymer and fullerene layer thicknesses. It is found that overall device performance and external quantum efficiencies (EQEs) in the wavelength region of peak absorption are enhanced for thinner polymer as well as thinner fullerene layers. We present a simple, first level model for EQE curves that accounts for the effects of absorption throughout the film. The model considers 3 distinct regions; pure donor, interdiffused donor and acceptor, and pure acceptor. It is found that this model reproduces quite effectively the experimentally observed shapes and relative magnitudes for varying donor thickness when compared with a similar experimental study. It also reproduces the shapes of the EQE curves but is not as effective in reproducing the relative magnitudes for varying fullerene thickness devices.

Paper Details

Date Published: 3 October 2005
PDF: 10 pages
Proc. SPIE 5938, Organic Photovoltaics VI, 593813 (3 October 2005); doi: 10.1117/12.615987
Show Author Affiliations
A. Gopal, Virginia Tech (United States)
M. Drees, Virginia Tech (United States)
R. M. Davis, Virginia Tech (United States)
J. R. Heflin, Virginia Tech (United States)

Published in SPIE Proceedings Vol. 5938:
Organic Photovoltaics VI
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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