ZnO-Ag-MoO3 transparent composite electrode for ITO-free, PEDOT: PSS-free bulk-heterojunction organic solar cells

Hyung Woo Choi; N. David Theodore; Terry Alford

doi:10.1016/j.solmat.2013.07.009

ZnO-Ag-MoO₃ transparent composite electrode for ITO-free, PEDOT: PSS-free bulk-heterojunction organic solar cells

Hyung Woo Choi, N. David Theodore, Terry Alford

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

21 Scopus citations

Abstract

We report on the electrical and optical properties of ZnO/Ag/MoO ₃ (ZAM) multilayer electrodes deposited directly on glass substrates by a combination of radio frequency (RF) and direct current (DC) sputtering for bulk-heterojunction organic solar cells (OSCs). Compared to indium tin oxide (ITO) electrodes showing 20 Ω/sq, the transparent composite electrodes (TCE) in this study exhibited very low sheet resistance of 5 Ω/sq without post annealing. In addition, as a hole transport layer, the MoO₃ performed with a higher fill factor than PEDOT:PSS due to lower series resistance, resulting in a power conversion efficiency of 2.3%, V_oc of 0.59 V, and J_sc of 9 mA/cm². The power conversion efficiency of the OSC with the ZAM electrode is lower than that of organic solar cells on ITO which has 3.3% efficiency, due to lower transmittance after MoO₃ layer deposition. However, our results do support the possibility of using MoO₃ as both Ag protecting and hole transport layers for indium-less and PEDOT:PSS-less bulk-heterojunction OSCs.

Original language	English (US)
Pages (from-to)	446-450
Number of pages	5
Journal	Solar Energy Materials and Solar Cells
Volume	117
DOIs	https://doi.org/10.1016/j.solmat.2013.07.009
State	Published - 2013

Keywords

Bulk heterojunction
MoO
Organic solar cell
Zinc oxide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films

Access to Document

10.1016/j.solmat.2013.07.009

Cite this

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title = "ZnO-Ag-MoO3 transparent composite electrode for ITO-free, PEDOT: PSS-free bulk-heterojunction organic solar cells",

abstract = "We report on the electrical and optical properties of ZnO/Ag/MoO 3 (ZAM) multilayer electrodes deposited directly on glass substrates by a combination of radio frequency (RF) and direct current (DC) sputtering for bulk-heterojunction organic solar cells (OSCs). Compared to indium tin oxide (ITO) electrodes showing 20 Ω/sq, the transparent composite electrodes (TCE) in this study exhibited very low sheet resistance of 5 Ω/sq without post annealing. In addition, as a hole transport layer, the MoO3 performed with a higher fill factor than PEDOT:PSS due to lower series resistance, resulting in a power conversion efficiency of 2.3%, Voc of 0.59 V, and Jsc of 9 mA/cm2. The power conversion efficiency of the OSC with the ZAM electrode is lower than that of organic solar cells on ITO which has 3.3% efficiency, due to lower transmittance after MoO3 layer deposition. However, our results do support the possibility of using MoO3 as both Ag protecting and hole transport layers for indium-less and PEDOT:PSS-less bulk-heterojunction OSCs.",

keywords = "Bulk heterojunction, MoO, Organic solar cell, Zinc oxide",

author = "Choi, {Hyung Woo} and Theodore, {N. David} and Terry Alford",

note = "Funding Information: This research was partially supported by the National Science Foundation (C. Ying, Grant no. DMR-0902277 ).",

year = "2013",

doi = "10.1016/j.solmat.2013.07.009",

language = "English (US)",

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T1 - ZnO-Ag-MoO3 transparent composite electrode for ITO-free, PEDOT

T2 - PSS-free bulk-heterojunction organic solar cells

AU - Choi, Hyung Woo

AU - Theodore, N. David

AU - Alford, Terry

N1 - Funding Information: This research was partially supported by the National Science Foundation (C. Ying, Grant no. DMR-0902277 ).

PY - 2013

Y1 - 2013

N2 - We report on the electrical and optical properties of ZnO/Ag/MoO 3 (ZAM) multilayer electrodes deposited directly on glass substrates by a combination of radio frequency (RF) and direct current (DC) sputtering for bulk-heterojunction organic solar cells (OSCs). Compared to indium tin oxide (ITO) electrodes showing 20 Ω/sq, the transparent composite electrodes (TCE) in this study exhibited very low sheet resistance of 5 Ω/sq without post annealing. In addition, as a hole transport layer, the MoO3 performed with a higher fill factor than PEDOT:PSS due to lower series resistance, resulting in a power conversion efficiency of 2.3%, Voc of 0.59 V, and Jsc of 9 mA/cm2. The power conversion efficiency of the OSC with the ZAM electrode is lower than that of organic solar cells on ITO which has 3.3% efficiency, due to lower transmittance after MoO3 layer deposition. However, our results do support the possibility of using MoO3 as both Ag protecting and hole transport layers for indium-less and PEDOT:PSS-less bulk-heterojunction OSCs.

AB - We report on the electrical and optical properties of ZnO/Ag/MoO 3 (ZAM) multilayer electrodes deposited directly on glass substrates by a combination of radio frequency (RF) and direct current (DC) sputtering for bulk-heterojunction organic solar cells (OSCs). Compared to indium tin oxide (ITO) electrodes showing 20 Ω/sq, the transparent composite electrodes (TCE) in this study exhibited very low sheet resistance of 5 Ω/sq without post annealing. In addition, as a hole transport layer, the MoO3 performed with a higher fill factor than PEDOT:PSS due to lower series resistance, resulting in a power conversion efficiency of 2.3%, Voc of 0.59 V, and Jsc of 9 mA/cm2. The power conversion efficiency of the OSC with the ZAM electrode is lower than that of organic solar cells on ITO which has 3.3% efficiency, due to lower transmittance after MoO3 layer deposition. However, our results do support the possibility of using MoO3 as both Ag protecting and hole transport layers for indium-less and PEDOT:PSS-less bulk-heterojunction OSCs.

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KW - Zinc oxide

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