Optical modeling of organic solar cells based on CuPc and C60.
We have investigated the influence of the poly(3,4-ethylenedioxythiophene)-blend-poly(styrene-sulfonate) (PEDOT:PSS) layer on the short-circuit current density (J(sc)) of single planar heterojunction organic solar cells based on a copper phthalocyanine (CuPc)-buckminsterfullerene (C(60)) active layer. Complete optical and electrical modeling of the cell has been performed taking into account optical interferences and exciton diffusion. Comparison of experimental and simulated external quantum efficiency has allowed us to estimate the exciton diffusion length to be 37 nm for the CuPc and 19 nm for the C(60). The dependence of short-circuit current densities versus the thickness of the PEDOT:PSS layer is analyzed and compared with experimental data. It is found that the variation in short-circuit current densities could be explained by optical interferences.
Monestier
Florent
F
Laboratoire TECSEN , Unité Mixte de Recherche 6122, Centre National de la Recherche, Université Paul Cézanne, Aix-Marseille 3, Domaine Universitaire de Saint-Jérôme, 13397 Marseille, France.
Simon
Jean-Jacques
JJ
Torchio
Philippe
P
Escoubas
Ludovic
L
Ratier
Bernard
B
Hojeij
Wassim
W
Lucas
Bruno
B
Moliton
André
A
Cathelinaud
Michel
M
Defranoux
Christophe
C
Flory
François
F