The Effect of Hole Transport Material Pore Filling on Photovoltaic Performance in Solid-State Dye-Sensitized Solar Cells

John Melas-Kyriazi; I-Kang Ding; Arianna Marchioro; Angela Punzi; Brian E. Hardin; George F. Burkhard; Nicolas Tétreault; Michael Grätzel; Jacques-E. Moser; Michael D. McGehee

doi:10.1002/aenm.201100046

The Effect of Hole Transport Material Pore Filling on Photovoltaic Performance in Solid-State Dye-Sensitized Solar Cells

John Melas-Kyriazi, I-Kang Ding, Arianna Marchioro, Angela Punzi, Brian E. Hardin, George F. Burkhard, Nicolas Tétreault, Michael Grätzel, Jacques-E. Moser, Michael D. McGehee

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Abstract

A detailed investigation of the effect of hole transport material (HTM) pore filling on the photovoltaic performance of solid-state dye-sensitized solar cells (ss-DSCs) and the specific mechanisms involved is reported. It is demonstrated that the efficiency and photovoltaic characteristics of ss-DSCs improve with the pore filling fraction (PFF) of the HTM, 2,2',7,7'-tetrakis-(N, N-di-p-methoxyphenylamine)9,9'-spirobifluorene(spiro-OMeTAD). The mechanisms through which the improvement of photovoltaic characteristics takes place were studied with transient absorption spectroscopy and transient photovoltage/photocurrent measurements. It is shown that as the spiro-OMeTAD PFF is increased from 26% to 65%, there is a higher hole injection efficiency from dye cations to spiro-OMeTAD because more dye molecules are covered with spiro-OMeTAD, an order-of-magnitude slower recombination rate because holes can diffuse further away from the dye/HTM interface, and a 50% higher ambipolar diffusion coefficient due to an improved percolation network. Device simulations predict that if 100% PFF could be achieved for thicker devices, the efficiency of ss-DSCs using a conventional rutheniumdye would increase by 25% beyond its current value. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English (US)
Pages (from-to)	407-414
Number of pages	8
Journal	Advanced Energy Materials
Volume	1
Issue number	3
DOIs	https://doi.org/10.1002/aenm.201100046
State	Published - Apr 5 2011
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-C1 - 015-21
Acknowledgements: J. M.-K. and I.-K. D. contributed equally to this work. This publication was partially based on work supported by the Center for Advanced Molecular Photovoltaics (Award No KUS-C1 - 015-21) made by King Abdullah University of Science and Technology (KAUST). A. M., A. P., N. T., M. G., and J.-E. M. are grateful to the Swiss National Science Foundation for financial support. We thank Dr. Robin Humphry-Baker for his experimental assistance with transient photovoltage/photocurrent measurements, Dr. Shaik M. Zakeeruddin for providing Z907 dye, Manuel Tschumi for fabricating TiO2 films, and George Y. Margulis for providing absorption data used in Section 2.6.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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title = "The Effect of Hole Transport Material Pore Filling on Photovoltaic Performance in Solid-State Dye-Sensitized Solar Cells",

abstract = "A detailed investigation of the effect of hole transport material (HTM) pore filling on the photovoltaic performance of solid-state dye-sensitized solar cells (ss-DSCs) and the specific mechanisms involved is reported. It is demonstrated that the efficiency and photovoltaic characteristics of ss-DSCs improve with the pore filling fraction (PFF) of the HTM, 2,2',7,7'-tetrakis-(N, N-di-p-methoxyphenylamine)9,9'-spirobifluorene(spiro-OMeTAD). The mechanisms through which the improvement of photovoltaic characteristics takes place were studied with transient absorption spectroscopy and transient photovoltage/photocurrent measurements. It is shown that as the spiro-OMeTAD PFF is increased from 26% to 65%, there is a higher hole injection efficiency from dye cations to spiro-OMeTAD because more dye molecules are covered with spiro-OMeTAD, an order-of-magnitude slower recombination rate because holes can diffuse further away from the dye/HTM interface, and a 50% higher ambipolar diffusion coefficient due to an improved percolation network. Device simulations predict that if 100% PFF could be achieved for thicker devices, the efficiency of ss-DSCs using a conventional rutheniumdye would increase by 25% beyond its current value. {\textcopyright} 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",

author = "John Melas-Kyriazi and I-Kang Ding and Arianna Marchioro and Angela Punzi and Hardin, {Brian E.} and Burkhard, {George F.} and Nicolas T{\'e}treault and Michael Gr{\"a}tzel and Jacques-E. Moser and McGehee, {Michael D.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-C1 - 015-21 Acknowledgements: J. M.-K. and I.-K. D. contributed equally to this work. This publication was partially based on work supported by the Center for Advanced Molecular Photovoltaics (Award No KUS-C1 - 015-21) made by King Abdullah University of Science and Technology (KAUST). A. M., A. P., N. T., M. G., and J.-E. M. are grateful to the Swiss National Science Foundation for financial support. We thank Dr. Robin Humphry-Baker for his experimental assistance with transient photovoltage/photocurrent measurements, Dr. Shaik M. Zakeeruddin for providing Z907 dye, Manuel Tschumi for fabricating TiO2 films, and George Y. Margulis for providing absorption data used in Section 2.6. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

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doi = "10.1002/aenm.201100046",

language = "English (US)",

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T1 - The Effect of Hole Transport Material Pore Filling on Photovoltaic Performance in Solid-State Dye-Sensitized Solar Cells

AU - Melas-Kyriazi, John

AU - Ding, I-Kang

AU - Marchioro, Arianna

AU - Punzi, Angela

AU - Hardin, Brian E.

AU - Burkhard, George F.

AU - Tétreault, Nicolas

AU - Grätzel, Michael

AU - Moser, Jacques-E.

AU - McGehee, Michael D.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-C1 - 015-21 Acknowledgements: J. M.-K. and I.-K. D. contributed equally to this work. This publication was partially based on work supported by the Center for Advanced Molecular Photovoltaics (Award No KUS-C1 - 015-21) made by King Abdullah University of Science and Technology (KAUST). A. M., A. P., N. T., M. G., and J.-E. M. are grateful to the Swiss National Science Foundation for financial support. We thank Dr. Robin Humphry-Baker for his experimental assistance with transient photovoltage/photocurrent measurements, Dr. Shaik M. Zakeeruddin for providing Z907 dye, Manuel Tschumi for fabricating TiO2 films, and George Y. Margulis for providing absorption data used in Section 2.6. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2011/4/5

Y1 - 2011/4/5

N2 - A detailed investigation of the effect of hole transport material (HTM) pore filling on the photovoltaic performance of solid-state dye-sensitized solar cells (ss-DSCs) and the specific mechanisms involved is reported. It is demonstrated that the efficiency and photovoltaic characteristics of ss-DSCs improve with the pore filling fraction (PFF) of the HTM, 2,2',7,7'-tetrakis-(N, N-di-p-methoxyphenylamine)9,9'-spirobifluorene(spiro-OMeTAD). The mechanisms through which the improvement of photovoltaic characteristics takes place were studied with transient absorption spectroscopy and transient photovoltage/photocurrent measurements. It is shown that as the spiro-OMeTAD PFF is increased from 26% to 65%, there is a higher hole injection efficiency from dye cations to spiro-OMeTAD because more dye molecules are covered with spiro-OMeTAD, an order-of-magnitude slower recombination rate because holes can diffuse further away from the dye/HTM interface, and a 50% higher ambipolar diffusion coefficient due to an improved percolation network. Device simulations predict that if 100% PFF could be achieved for thicker devices, the efficiency of ss-DSCs using a conventional rutheniumdye would increase by 25% beyond its current value. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

AB - A detailed investigation of the effect of hole transport material (HTM) pore filling on the photovoltaic performance of solid-state dye-sensitized solar cells (ss-DSCs) and the specific mechanisms involved is reported. It is demonstrated that the efficiency and photovoltaic characteristics of ss-DSCs improve with the pore filling fraction (PFF) of the HTM, 2,2',7,7'-tetrakis-(N, N-di-p-methoxyphenylamine)9,9'-spirobifluorene(spiro-OMeTAD). The mechanisms through which the improvement of photovoltaic characteristics takes place were studied with transient absorption spectroscopy and transient photovoltage/photocurrent measurements. It is shown that as the spiro-OMeTAD PFF is increased from 26% to 65%, there is a higher hole injection efficiency from dye cations to spiro-OMeTAD because more dye molecules are covered with spiro-OMeTAD, an order-of-magnitude slower recombination rate because holes can diffuse further away from the dye/HTM interface, and a 50% higher ambipolar diffusion coefficient due to an improved percolation network. Device simulations predict that if 100% PFF could be achieved for thicker devices, the efficiency of ss-DSCs using a conventional rutheniumdye would increase by 25% beyond its current value. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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The Effect of Hole Transport Material Pore Filling on Photovoltaic Performance in Solid-State Dye-Sensitized Solar Cells

Abstract

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