Effect of layer thickness on the thermoelectric properties of fully sprayed poly(3-hexylthiophene-2,5-diyl) thin films doped with chloroauric acid

• DOI: 10.1007/s11998-024-01008-0
• Publication Date: 2024-10-14T17:02:19Z
• Authors: Benedikt Sochor; Simon Schraad; Linus F. Huber; Alexander Hexemer; Tim Laarmann; Sarathlal Koyilot...; Peter Müller-Busc...; Stephan V. Roth
• Keywords: Chloroauric acid

Abstract The thermoelectric properties of fully sprayed thin films poly(3-hexylthiophen-2,5-diyl) (P3HT) doped with chloroauric acid are investigated for different film thicknesses. thickness increases logarithmically increasing amount deposited material on the surfaces. Both electrical conductivity and measured Seebeck coefficients show an optimal polymer layer between 275 310 nm yield a maximum power factor $$(1.77\,\pm \,0.22) \frac{\mu \text {W}}{\text {m}\cdot {K}^2}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mo>(</mml:mo> <mml:mn>1.77</mml:mn> <mml:mspace/> <mml:mo>±</mml:mo> <mml:mn>0.22</mml:mn> <mml:mo>)</mml:mo> </mml:mrow> <mml:mfrac> <mml:mi>μ</mml:mi> <mml:mtext>W</mml:mtext> <mml:mtext>m</mml:mtext> <mml:mo>·</mml:mo> <mml:msup> <mml:mtext>K</mml:mtext> <mml:mn>2</mml:mn> </mml:msup> </mml:mfrac> </mml:math> . optimum results from dopant molecules per monomer 1.1 1.3 at these ratios P3HT HAuCl $$_4$$ <mml:mmultiscripts> <mml:mrow/> <mml:mn>4</mml:mn> </mml:mmultiscripts> fabrication.