DOI: 10.1063/1.3120566. Enhanced exciton diffusion in an organic photovoltaic cell by energy transfer using a phosphorescent sensitizer

Enhanced exciton diffusion in an organic photovoltaic cell by energy transfer using a phosphorescent sensitizer

10.1063/1.3120566

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

We demonstrate enhanced exciton diffusion in an organic photovoltaic cell through the incorporation of a phosphorescent sensitizer. The increase in exciton diffusion length (LD) is realized using a composite electron donor layer consisting of a N,N′-bis(naphthalen-1-yl)-N,N′-bis(phenyl)-benzidine (NPD) host doped with the phosphorescent guest fac-tris(2-phenylpyridine) iridium [Ir(ppy)3]. The presence of the phosphor at low concentration allows for the population of the long-lived NPD triplet state and an increase in LD. An increase in the NPD LD from 6.5±0.3 to 11.8±0.6 nm is extracted from measurements of the external quantum efficiency for donor layers containing 5 wt % Ir(ppy)3. This enhancement leads to a ∼80% improvement in the power conversion efficiency relative to devices containing an undoped donor layer.

Bibliography

Luhman, W. A., & Holmes, R. J. (2009). Enhanced exciton diffusion in an organic photovoltaic cell by energy transfer using a phosphorescent sensitizer. Applied Physics Letters, 94(15).

Authors 2

Wade A. Luhman (first)
Russell J. Holmes (additional)

References 25 Referenced 95

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Dates

Type	When
Created	16 years, 4 months ago (April 17, 2009, 7:01 p.m.)
Deposited	2 years, 2 months ago (July 2, 2023, 5:11 p.m.)
Indexed	1 month, 1 week ago (July 30, 2025, 6:52 a.m.)
Issued	16 years, 4 months ago (April 13, 2009)
Published	16 years, 4 months ago (April 13, 2009)
Published Online	16 years, 4 months ago (April 16, 2009)
Published Print	16 years, 4 months ago (April 13, 2009)

Funders 0

None

BibTeX

@article{Luhman_2009, title={Enhanced exciton diffusion in an organic photovoltaic cell by energy transfer using a phosphorescent sensitizer}, volume={94}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.3120566}, DOI={10.1063/1.3120566}, number={15}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Luhman, Wade A. and Holmes, Russell J.}, year={2009}, month=apr }

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