Exciton annihilation as bimolecular loss in organic solar cells

Lior Tzabari; Victoria Zayats; Nir Tessler

doi:https://doi.org/10.1063/1.4825048

Exciton annihilation as bimolecular loss in organic solar cells

Lior Tzabari, Victoria Zayats, Nir Tessler

Technion - Israel Institute of Technology

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

Abstract

The dependence of the internal quantum efficiency of P3HT:PCBM (Poly(3-hexylthiophene-2,5-diyl):[6,6]-Phenyl C61 butyric acid methyl ester) solar cell on light intensity was measured over four orders of magnitude and for devices annealed for 4 and 10 min. We find that both trap assisted (Shockley-Read-Hall type) and bimolecular losses coexist, the relative magnitude of which is dependent on both the light intensity and the processing conditions. We suggest that the use of Langevin type charge recombination in conjunction with trap assisted recombination is not the best choice and show that the well-known exciton annihilation by charge polaron may better account for the bimolecular losses.

Original language	English
Article number	154514
Journal	Journal of Applied Physics
Volume	114
Issue number	15
DOIs	https://doi.org/10.1063/1.4825048
State	Published - 21 Oct 2013

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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https://doi.org/10.1063/1.4825048

Cite this

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title = "Exciton annihilation as bimolecular loss in organic solar cells",

abstract = "The dependence of the internal quantum efficiency of P3HT:PCBM (Poly(3-hexylthiophene-2,5-diyl):[6,6]-Phenyl C61 butyric acid methyl ester) solar cell on light intensity was measured over four orders of magnitude and for devices annealed for 4 and 10 min. We find that both trap assisted (Shockley-Read-Hall type) and bimolecular losses coexist, the relative magnitude of which is dependent on both the light intensity and the processing conditions. We suggest that the use of Langevin type charge recombination in conjunction with trap assisted recombination is not the best choice and show that the well-known exciton annihilation by charge polaron may better account for the bimolecular losses.",

author = "Lior Tzabari and Victoria Zayats and Nir Tessler",

note = "Funding Information: This research was partially supported by the Israeli Ministry of Science Tashtiyot program, Israeli Nanotechnology Focal Technology Area project on “Nanophotonics and Detection,” the Grand Technion Energy Program (GTEP), and comprises part of The Leona M. and Harry B. Helmsley Charitable Trust reports on Alternative Energy series of the Technion, Israel Institute of Technology, and the Weizmann Institute of Science.",

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T1 - Exciton annihilation as bimolecular loss in organic solar cells

AU - Tzabari, Lior

AU - Zayats, Victoria

AU - Tessler, Nir

N1 - Funding Information: This research was partially supported by the Israeli Ministry of Science Tashtiyot program, Israeli Nanotechnology Focal Technology Area project on “Nanophotonics and Detection,” the Grand Technion Energy Program (GTEP), and comprises part of The Leona M. and Harry B. Helmsley Charitable Trust reports on Alternative Energy series of the Technion, Israel Institute of Technology, and the Weizmann Institute of Science.

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N2 - The dependence of the internal quantum efficiency of P3HT:PCBM (Poly(3-hexylthiophene-2,5-diyl):[6,6]-Phenyl C61 butyric acid methyl ester) solar cell on light intensity was measured over four orders of magnitude and for devices annealed for 4 and 10 min. We find that both trap assisted (Shockley-Read-Hall type) and bimolecular losses coexist, the relative magnitude of which is dependent on both the light intensity and the processing conditions. We suggest that the use of Langevin type charge recombination in conjunction with trap assisted recombination is not the best choice and show that the well-known exciton annihilation by charge polaron may better account for the bimolecular losses.

AB - The dependence of the internal quantum efficiency of P3HT:PCBM (Poly(3-hexylthiophene-2,5-diyl):[6,6]-Phenyl C61 butyric acid methyl ester) solar cell on light intensity was measured over four orders of magnitude and for devices annealed for 4 and 10 min. We find that both trap assisted (Shockley-Read-Hall type) and bimolecular losses coexist, the relative magnitude of which is dependent on both the light intensity and the processing conditions. We suggest that the use of Langevin type charge recombination in conjunction with trap assisted recombination is not the best choice and show that the well-known exciton annihilation by charge polaron may better account for the bimolecular losses.

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U2 - https://doi.org/10.1063/1.4825048

DO - https://doi.org/10.1063/1.4825048

M3 - مقالة

SN - 0021-8979

VL - 114

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 15

M1 - 154514

ER -

Exciton annihilation as bimolecular loss in organic solar cells

Abstract

All Science Journal Classification (ASJC) codes

UN SDGs

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