TY - JOUR
T1 - Organic solar cells with sensitized phosphorescent absorbing layers
AU - Rand, Barry P.
AU - Schols, Sarah
AU - Cheyns, David
AU - Gommans, Hans
AU - Girotto, Claudio
AU - Genoe, Jan
AU - Heremans, Paul
AU - Poortmans, Jef
N1 - Funding Information:
The authors would like to thank A. Hadipour and A. Kadashchuk for helpful discussions. One of the authors (S.S.) would like to acknowledge the FWO-Vlaanderen for financial support.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2009/8
Y1 - 2009/8
N2 - We demonstrate an increase of the exciton diffusion length (LD) of a fluorescent donor layer via the process of sensitized phosphorescence, whereby initially generated singlet excitons are transferred to triplet excitons via a properly chosen dopant molecule. Using a poly(p-phenylene vinylene) host doped with the phosphorescent molecule platinum octaethylporphyrin, LD increases from 4 ± 1 to 9 ± 1 nm for an optimal doping of 5 wt%. As a result of the increased LD, the photocurrent from the doped layer increases by 40%. By doping with the fluorescent, non-metalated analogue octaethylporphyrin, a reduction in photocurrent is shown, providing further evidence of the sensitized phosphorescence mechanism.
AB - We demonstrate an increase of the exciton diffusion length (LD) of a fluorescent donor layer via the process of sensitized phosphorescence, whereby initially generated singlet excitons are transferred to triplet excitons via a properly chosen dopant molecule. Using a poly(p-phenylene vinylene) host doped with the phosphorescent molecule platinum octaethylporphyrin, LD increases from 4 ± 1 to 9 ± 1 nm for an optimal doping of 5 wt%. As a result of the increased LD, the photocurrent from the doped layer increases by 40%. By doping with the fluorescent, non-metalated analogue octaethylporphyrin, a reduction in photocurrent is shown, providing further evidence of the sensitized phosphorescence mechanism.
KW - 31.50.Df
KW - 72.80.Le
KW - 84.60.Jt
KW - Excition diffusion length
KW - Organic photovoltaic cells
KW - Sensitized phosphorescence
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U2 - 10.1016/j.orgel.2009.04.011
DO - 10.1016/j.orgel.2009.04.011
M3 - Article
AN - SCOPUS:67649233071
VL - 10
SP - 1015
EP - 1019
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
SN - 1566-1199
IS - 5
ER -