The Influence of PEDOT to PSS Ratio on the Optical Properties of PEDOT:PSS Thin Solid Films - Insight from Spectroscopic Ellipsometry

Abstract

In this work, we study the influence of the PEDOT to PSS ratio on the optical properties of PEDOT:PSS thin solid films using spectroscopic ellipsometry and UV-vis spectrometry. In the data analysis, we develop a consisted composition dependent optical model of PEDOT:PSS. This enabled us to account for contributions from PSS part within the Tauc-Lorentz optical model and from PEDOT part within the Drude-Lorentz optical model. Moreover, we relate the optical properties of PEDOT:PSS thin solid films to their electrical specific conductivities in the frame of the generalized effective medium theory. Determined in this manner electrical conductivities of five commercially available water dispersions of PEDOT:PSS are compared with their nominal values.

PolyChemPrint: A hardware and software framework for benchtop additive manufacturing of functional polymeric materials

“…After optimizing printing speed and ink formulation, reproducible channel lengths as small as ~50 microns could be achieved when printing on polyethylene terephthalate (PET) substrates with a thin poly(4‐vinylphenol):4,4′‐(hexafluoroisopropylidene)diphthalic anhydride (PVP:HDA) passivation layer. PEDOT:PSS conductivity for deposited films was measured to be 169.75 ±18 S/cm (SI 4.1), comparable to the 150 S/cm previously reported for spincast films 28 . Finally, we demonstrate the ability to deposit highly complex 2D and 3D patterns in Figure 4(H),(J), using a PLA‐b‐PDMS bottlebrush block copolymer in tetrahydrofuran as the model system.…”

“…PEDOT:PSS conductivity for deposited films was measured to be 169.75 ±18 S/cm (SI 4.1), comparable to the 150 S/cm previously reported for spincast films. 28 Finally, we demonstrate the ability to deposit highly complex 2D and 3D patterns in Figure 4(H),(J), using a PLA-b-PDMS bottlebrush block copolymer in tetrahydrofuran as the model system. The chameleon pattern shown in Figure 4 (H) was illustrated and converted to G-code in Inkscape before executing through the PolyChemPrint software.…”

Temperature-Dependent Spectroscopic Ellipsometry of Thin Polymer Films

“…Uniaxial anisotropic materials with their optical axis oriented perpendicular to the surface, such as, e.g., spin-coated PEDOT:PSS or ordered P3HT phase, are still described by eq 2 . 2 , 82 However, their principal dielectric functions are no longer scalar values, but ε x = ε y ≠ ε z , where ε τ , τ = x , y , z denote τ-component of the dielectric function of a given material. In the case of materials with uniaxial optical anisotropy whose optical axis is oriented in the z direction, their component of the dielectric function in the plane, , is described as ordinary and that off-plane, , respectively, as extraordinary.…”

Design and fabrication of CuInS2/ZnS-based QLED for automotive lighting systems

“…Table 3 presents all experimental parameter values used in the simulation. 35,[52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68] Table 3: QLED Layers (ANODE-HIL-HTL-EL-ETL-CATHODE) bulk material properties.…”