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.

Original languageEnglish (US)
Pages (from-to)446-450
Number of pages5
JournalSolar Energy Materials and Solar Cells
Volume117
DOIs
StatePublished - 2013

Fingerprint

Tin oxides
Indium
Heterojunctions
Electrodes
Composite materials
Conversion efficiency
Sheet resistance
Sputtering
Multilayers
Electric properties
Optical properties
Annealing
Glass
Organic solar cells
poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)
molybdenum trioxide
indium tin oxide
Substrates

Keywords

  • Bulk heterojunction
  • MoO
  • Organic solar cell
  • Zinc oxide

ASJC Scopus subject areas

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

Cite this

ZnO-Ag-MoO3 transparent composite electrode for ITO-free, PEDOT : PSS-free bulk-heterojunction organic solar cells. / Choi, Hyung Woo; Theodore, N. David; Alford, Terry.

In: Solar Energy Materials and Solar Cells, Vol. 117, 2013, p. 446-450.

Research output: Contribution to journalArticle

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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.",
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AU - Choi, Hyung Woo

AU - Theodore, N. David

AU - Alford, Terry

PY - 2013

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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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