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Efficient polymer solar cells with a solution-processed gold chloride as an anode interfacial modifier
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Figures

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FIG. 1.

(a) Structure of the polymer solar cells with a AuCl3 interfacial modifier. (b) Current density-voltage (J-V) curves of various solar cells with and without AuCl3 under illumination.

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FIG. 2.

Comparison of (a) PCE, (b) Voc, (c) FF, and (d) Jsc of solar cells with ITO, ITO/AuCl3 and ITO/PEDOT.

Image of FIG. 3.

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FIG. 3.

Changes in (a) ITO work-functions and (b) sheet resistance by the AuCl3 treatment. XPS (c) Au 4f and (d) Cl 2p spectra of AuCl3-treated ITO films.

Image of FIG. 4.

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FIG. 4.

(a) Rs and Rsh of cells with untreated ITO, AuCl3, and PEDOT. (b) AFM images of untreated ITO, PEDOT, and AuCl3. The scale bar in the AFM images represents 1 μm. (c) Transmittance spectra of ITO, ITO/AuCl3, and ITO/PEDOT. The inset shows an enlarged transmittance data. (d) EQE spectra for ITO, ITO/AuCl3, and ITO/PEDOT.

Image of FIG. 5.

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FIG. 5.

Changes in PCE of a conventional PEDOT-based solar cell and a polymer solar cell with AuCl3 during exposure to air.

Tables

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Table I.

Photovoltaic parameters and efficiencies of polymer solar cells with AuCl3 and the reference cell without any interfacial layer.

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/content/aip/journal/apl/102/16/10.1063/1.4803039
2013-04-23
2014-04-17

Abstract

The use of a solution-processed gold chloride (AuCl3) as an anode interfacial modifier was investigated for high-performance polymer solar cells (PSCs). Kelvin probe, 4-point probe, and X-ray photoelectron spectroscopy studies demonstrated that AuCl3 increases the indium-tin-oxide (ITO) work-function and decreases the ITO sheet resistance, because of Au nanoparticle formation and Cl adsorption by the AuCl3 treatment to induce a p-doping effect, thereby improving the built-in potential and interface resistance. As a result, the introduction of AuCl3 by simple solution processing remarkably improved cell-performances, indicating that AuCl3 is an efficient anode interfacial modifier for enhancing PSC-performance.

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Scitation: Efficient polymer solar cells with a solution-processed gold chloride as an anode interfacial modifier
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/16/10.1063/1.4803039
10.1063/1.4803039
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