Organic solar cells with sensitized phosphorescent absorbing layers

Barry P. Rand; Sarah Schols; David Cheyns; Hans Gommans; Claudio Girotto; Jan Genoe; Paul Heremans; Jef Poortmans

doi:10.1016/j.orgel.2009.04.011

Organic solar cells with sensitized phosphorescent absorbing layers

Barry P. Rand, Sarah Schols, David Cheyns, Hans Gommans, Claudio Girotto, Jan Genoe, Paul Heremans, Jef Poortmans

Research output: Contribution to journal › Article › peer-review

57 Scopus citations

Abstract

We demonstrate an increase of the exciton diffusion length (L_D) 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, L_D increases from 4 ± 1 to 9 ± 1 nm for an optimal doping of 5 wt%. As a result of the increased L_D, 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.

Original language	English (US)
Pages (from-to)	1015-1019
Number of pages	5
Journal	Organic Electronics
Volume	10
Issue number	5
DOIs	https://doi.org/10.1016/j.orgel.2009.04.011
State	Published - Aug 2009

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biomaterials
Chemistry(all)
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

Keywords

31.50.Df
72.80.Le
84.60.Jt
Excition diffusion length
Organic photovoltaic cells
Sensitized phosphorescence

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title = "Organic solar cells with sensitized phosphorescent absorbing layers",

abstract = "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.",

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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

PY - 2009/8

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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.

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