EDOT Research Articles

Manufacturing Organic Environmentally Friendly Electrical Circuits Using the Composites’ Single‐Walled Carbon Nanotubes and PEDOT:PSS

Herein, several different methods of preparation to explore the thermal and electrical properties of cotton fabric impregnated with single‐walled carbon nanotubes (SWCNTs) and poly (3,4 ethylenedioxy thiophene) poly(styrenesul‐fonate) (PEDOT:PSS) are used. The SWCNTs and PEDOT:PSS are delivered by the drop‐casting technique either as a mixture of these constituents or as a series of steps in which each constituent is added sequentially. The primary finding is that lower sheet resistances can be achieved by applying the constituents in sequence rather than as a mixture. For example, given fixed amounts of SWCNTs and PEDOT:PSS delivered as a mixture have sheet resistance 2.158 Ω cm−1, but when the same amounts are delivered in the order SWCNTs followed by PEDOT: PSS, the sheet resistance is reduced to 0.985 Ω cm−1, and when this order is reversed, the sheet resistance is further reduced to 0.633 Ω cm−1. Finally, when the same total amounts of SWCNTs and PEDOT:PSS are delivered in the order SWCNTs followed by PEDOT:PSS, followed by SWCNTs, the sheet resistance is further reduced to 0.342 Ω cm−1. Sheet resistances of the conductive cotton fabric are found to be stable over a period of 4 months at room temperature.

Enhanced performance of SnSe/PEDOT: PSS composite films by MWCNTs for flexible thermoelectric power generator

Flexible multiwall carbon nanotubes (MWCNTs)− 10 wt% tin selenide (SnSe)/poly (3,4- ethylene dioxythiophene): poly (styrene sulfonate) (PEDOT: PSS)/5 vol% dimethyl sulfoxide (DMSO) (MSPPD) composite films were fabricated by vacuum filtration method, and their thermoelectric properties were investigated. When the electrical conductivity (σ) and Seebeck coefficient (S) of these composite films with different contents of MWCNTs were measured at different temperatures, σ had an increasing tendency with the increase of MWCNTs content while S would decrease gradually. MWCNTs would improve carrier concentration (n) and mobility (μ) of SnSe/PEDOT: PSS film simultaneously because of MWCNTs with high electrical conductivity and carrier mobility. The maximum power factor PF of 59.35 μWm−1K−2 had been obtained for MSPPD10 composite film at 393 K. The MSPPD10 composite film exhibited ex-cellent flexibility, σ decreased only to 86% of its initial stage after bending 1000 cycles using a rod with a radius of 4 mm. A flexible thermoelectric (TE) generator consisting of 5 legs MSPPD10 could generate an open-circuit voltage of 3.73 mV and maximum output power of 14.74 nW when the temperature gradient was 39 K. This research shows that MWCNTs have great potential to enhance the thermoelectric performance of flexible SnSe/PEDOT: PSS composite films for wearable devices.

Deposition and Characterization of Innovative Bulk Heterojunction Films Based on CuBi2O4 Nanoparticles and Poly(3,4 ethylene dioxythiophene):Poly(4-styrene sulfonate) Matrix

This work presents the deposition and study of the semiconductor behavior of CuBi2O4 nanoparticles (NPs) with an average crystallite size of 24 ± 2 nm embedded in poly(3,4 ethylene dioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) films. The CuBi2O4 NP bandgap was estimated at 1.7 eV, while for the composite film, it was estimated at 2.1 eV, due to PEDOT:PSS and the heterojunction between the polymer and the NPs. The charge transport of the glass/ITO/PEDOT:PSS-CuBi2O4 NP/Ag system was studied under light and dark conditions by means of current–voltage (I–V) characteristic curves. In natural-light conditions, the CuBi2O4 NPs presented electric behavior characterized by three different mechanisms: at low voltages, the behavior follows Ohm’s law; when the voltage increases, charge transport occurs by diffusion between the NP–polymer interfaces; and at higher voltages, it occurs due to the current being dominated by the saturation region. Due to their crystalline structure, their low bandgap in films and the feasibility of integrating them as components in composite films with PEDOT:PSS, CuBi2O4 NPs can be used as parts in optoelectronic devices.

Electrodeposition of Cu on PEDOT for a Hybrid Solid-State Electronic Device

Conductive polymers are nowadays attracting great attention for their peculiar mechanical, electrical and optical proprieties. In particular, PEDOT can be used in a wide range of innovative applications, from electroluminescent devices to photovoltaics. In this work, the electrochemical deposition of 3,4 ethylenedioxythiophene (EDOT) was performed on various substrates (ITO, thin films of gold and palladium on silicon wafers) by means of both potentiostatic and potentiodynamic techniques. This was intended to further expand the applications of electrochemically deposited PEDOT, particularly regarding the preparation of thin films in tight contact with electrode surfaces. This allows one to obtain systems prone to be used as electrodes in stacked devices. Chronoamperometric experiments were performed to study the nucleation and growth process of PEDOT. SEM, ESEM and AFM analysis allowed the characterization of the morphology of the polymeric films obtained. Raman and visible spectroscopy confirmed the high-quality of the coatings on the different substrates. Then, the PEDOT films were used as the base material for the further electrodeposition of a copper layer. In this way, a hybrid electronic device was obtained, by using electrochemical methods only. The high conductivity and ohmic behavior of the device were confirmed over a wide range of frequencies with electrical impedance spectroscopy analysis.

Improving the Sensitivity of an Organic Photodetector by Adding a Polar Solvent to the Hole-Transport Layer for Indirect X-ray Detection.

In this work, we investigated how the performance enhancement of an organic X-ray detector was improved by adding a dimethyl sulfoxide (DMSO) polar solvent to poly(3, 4-ethylene dioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) hole-transport layer. The changes in the properties, such as surface roughness, chemical structure, sheet resistance, and absorbance, of the PEDOT:PSS film caused by the DMSO treatment were examined. The application of DMSO treatment lowered the resistance of the PEDOT:PSS film because of the removal of PSS and the chemical structure change after DMSO treatment, and thus the transport of light-induced carriers was increased. The organic detector treated with 10 vol% DMSO showed the highest collected current density (CCD) of 357.42 nA/cm² and highest sensitivity of 2.58 mA/Gy ·cm², which were 31.88% and 32.31% higher than the CCD and sensitivity of the detector without DMSO treatment.

Visible photodetector based on transition metal-doped ZnO NRs/PEDOT:PSS hybrid materials.

A hybrid Cu-doped ZnO nanorods (ZnO:Cu NRs)/poly(3,4 ethylene dioxythiophene)-polystyrene sulfonate (PEDOT:PSS)-based photodetector was fabricated using a simple hydrothermal method with pre-patterned silver electrodes. In the hybrid structure, PEDOT:PSS with high mobility acts as a carrier transport layer, while ZnO:Cu NRs with high visible absorption works as an “antenna” material to generate electron–hole pairs under light illumination. As a result, the devices exhibits a high response in visible light at a wavelength of 395 nm. The responsivity and photoconductive gain of the hybrid photodetector reached 0.33 A W−1 and 1.306, respectively, which is 1.36 times higher than those of Cu-doped ZnO NRs-based ones. The response and recovery times are improved, with values of 25.21 s and 42.01 s, respectively. The development of hybrid materials for visible photodetectors enables an innovative approach for future optoelectronic devices, especially optical sensors.

Photoluminescence Quenching of a Novel Electroconductive Poly(propylene thiophenoimine)-co-Poly(ethylenedioxy thiophene) Star Copolymer.

A generation 1 poly(propylene thiophenoimine)-co-poly(ethylenedioxy thiophene) (G1PPT-co-PEDOT) star copolymer, which exhibits a strong optical absorption over a broad range in the ultraviolet–visible (UV-Vis) region and with good electro/conductive properties, was chemically prepared for the first time. Synthesis of the star copolymer, G1PPT-co-PEDOT was confirmed by spectroscopic studies. Indeed, the disappearance of the very high intensity bands, C–H bending at α-position (687 cm−1), and C=N stretching (1620 cm−1) in the Fourier transform infrared spectroscopy (FTIR) of G1PPT-co-PEDOT, which were initially present in the spectrum of the thiolated starting material, G1PPT, confirmed copolymerization. Furthermore, a large bathochromic shift in the onset wavelength of the UV-Vis absorbance spectra from 367 nm in G1PPT to 674 nm in G1PPT-co-PEDOT further attests of successful copolymerization. The electrochemical analysis of G1PPT-co-PEDOT achieved a highest occupied molecular orbital (HOMO) energy level value of 5.3 eV, which is reminiscent of the value for an ideal electron-donor material. Photoluminescence quenching of up to 82% was observed in solution blends of the G1PPT-co-PEDOT star copolymer and N,N′-diisopropyl naphthalene diimide (NDI). This demonstrates the occurrence of photoinduced intermolecular charge transfer (PICT) from the electron-donating G1PPT-co-PEDOT to the electron accepting NDI, a good property, beneficial for optoelectronic and photovoltaic applications.

Mechanosensitive Fluorescent Probes, Changing Color Like Lobsters during Cooking: Cascade Switching Variations

Abstract Fluorescent flipper probes have been introduced recently to image physical forces in biology. Their design is inspired by the combination of planarization and polarization that makes the color of astaxanthin, a carotenoid, turn blue in living lobsters or shrimps. Flipper probes are constructed around twisted dithienothiophene dimers. Upon planarization, donors and acceptors placed on both sides are coupled to generate push-pull systems that shift excitation maxima to the red, while the emission wavelength is mechanoinsensitive. To assure chemical stability, these donors and acceptors have to turn on only upon planarization. In living lobster, this is achieved most beautifully with non-covalent hydrogen bonds to and from the surrounding, planarizing protein. With flipper probes, the unorthodox chalcogen bonds prove best to produce turn-on donors and acceptors. The specific objective of this study was to explore different turn-on donors for the resulting chalcogen-bonding cascade switches. The focus is on substitution of the original triazoles with ethylenedioxythiophene (EDOT) and ortho-hydroxyphenyl (HOP) donors. Design, synthesis and evaluation of the respective flipper probes are described.

Au Nanoparticle-decorated Nanoporous PEDOT Modified Glassy Carbon Electrode: A New Electrochemical Sensing Platform for the Detection of Glutathione

Glutathione (GSH) is an important bio-thiol which is playing vital role in the human system, such as treating glaucoma, preventing asthma, cancer, etc. Therefore, electrochemical sensing of GSH is becoming very vital to know the level of the biomolecule in living systems. Hence, the present work aims to develop a sensor matrix for electrochemical biosensing of GSH at Au nanoparticle decorated Nanoporous poly(3,4)ethylene dioxythiophene (PEDOT) modified glassy carbon electrode (AuNPPEDOT/ GCE). The electrode is modified with a nanoporous fibrillar network of PEDOT containing Au nanoparticles and characterized using UV-Visible spectroscopy and Field Emission Scanning Electron Microscopy (FESEM). The platform is capable of producing enhanced signal against the bio-analyte at the applied overpotential of 0.6 V. Whereas bare glassy carbon electrode is unable to produce the signal. Conversely, Nanoporous PEDOT modified glassy carbon electrode can sense GSH of very low sensitivity at an applied overpotential of 0.7 V. From single step chronoamperometric measurements, kinetic parameters such as diffusion coefficient and apparent rate constant of the reaction were found as 5.01 × 10-5 cm2·s-1 and 1.106 × 103 M-1·s-1 respectively. From the amperometric response, the sensitivity and limit of detection (LOD) of the electrode were to be 10.7μA cm-2/μM and 0.173 μM respectively with the linear range of 0.5 to 10 μM. The matrix can detect GSH in the presence of other possible interfering molecules present in blood samples.

Photoinvertible Chiral Liquid Crystal that Affords Helicity‐Controlled Aromatic Conjugated Polymers

AbstractPhotoinvertible chiral compounds are synthesized by linking a photoresponsive bisbenzothienylethene moiety with an axially chiral binaphthyl moiety and used as chiral dopants to prepare a photoinvertible chiral nematic liquid crystal (N*‐LC) field. Subsequently, electrochemical polymerizations of ethylenedioxythiophene (EDOT) in the N*‐LC field to synthesize helical poly(ethylenedioxythiophene)s (H‐PEDOTs) are achieved. The H‐PEDOTs show not only spiral morphologies resembling the fingerprinted texture of N*‐LC in polarizing optical microscope but also bisignate Cotton effects in circular dichroism spectra, indicating the formation of a helically π‐stacked structure in terms of the main chains of H‐PEDOT. In addition, the signs of the bisignate Cotton effect are strictly determined by the helicity of the N*‐LC. The present N*‐LC is the first reaction field exhibiting photoinvertible chirality with extremely high fatigue resistance and serves as an asymmetric medium for electrochemical polymerization, leading to dynamic helicity control of conjugated polymers.

Solid-State Synthesized BiFeO3 Perovskite-Based Fast-Response White-Light Photodetector

This letter reports an indium doped tin oxide (ITO)/ZnO nanoparticles (NPs)/ BiFeO3 ferroelectric perovskite /poly (3, 4-ethylene dioxythiophene): polystyrene sulfonate (PEDOT: PSS)/Ag heterostructure based white-light photodetector. ZnO nanoparticles are synthesized using the sol-gel process, whereas solid-state route method is used for synthesizing BiFeO3. The X-ray diffraction (XRD) of ZnO nanoparticles and BiFeO3 thin film confirms the formation of the wurtzite hexagonal structure of ZnO NPs and the rhombohedral structure of BiFeO3 perovskite. The high-resolution scanning electron microscopy (HR-SEM) of the films confirm the highly dense and uniform growth of ZnO nanoparticles and BiFeO3. The measured responsivity characteristics over 400-750 nm show the maximum responsivity of ~34 mA/W over the wavelength of 450 to 650 nm at an applied bias voltage of 2 V. The photodetector exhibits a reasonably fast light response with the rise time of 7.21 s and fall time of 6.23 s.

Preparation and analysis of electrochromic properties of poly(3,4 ethylene dioxythiophene)

The film of PEDOT was prepared in this study via electrochemical polymerization using EDOT as monomer in LiClO4/PC solution. The effects on the properties of the film were surveyed including the deposition voltage and deposition time. The morphology of the film was observed by scanning electron microscopy. The electrochromic kinetics was analyzed by combination of electrochemical workstation and UV-Visible spectrophotometer such as the transmittance, transmittance contrast, coloring efficiency and the response time. The results indicated the film presents a coral shape despites of the deposition voltage and the deposition time. In case of the application as electrochromic film, the optimal process condition is 1.3 V and 24 s. The corresponding transmittance is 82.77% in fade state. The transmittance contrast is 17.87%, and the coloring efficiency is about 117.92 cm2/C, the response time is 0.52 s.

How does PEDOT grow like nanoropes? A theoretical investigation in pace with experimental insights

Poly 3–4 ethylene dioxythiophene (PEDOT) is a highly conducting polymer insoluble and intractable when synthesized under normal synthesis conditions. This polymer was found to assume spiral or ropelike nanostructures with some modification in physical properties when grown in presence of a liquid crystal 5CB. The present work focuses on finding out the underlying reason behind the unique morphology of PEDOT theoretically, using density functional theory (DFT) as implemented in the Gaussian 03 suite of programs. From the energy minimized structures of 5CB clusters as well as PEDOT-5CB combinations it was observed that in the clusters of 6 or 10 molecules, 5CB is self-assembled in spiral orientation which might have guided the similar growth of PEDOT. It was also established from molecular orbital studies that the neighboring 5CB environment undergoes some sort of nonbonding interaction with the growing PEDOT chains and has resulted in the modification of solubility and few other properties of PEDOT. Therefore the PEDOT nanostructure obtained under the present synthesis condition is supposed to be a hybrid material having optical and electrical properties dominated by the PEDOT counterpart.

Supercapacitor studies of activated carbon functionalized with poly(ethylene dioxythiophene): Effects of surfactants, electrolyte concentration on electrochemical properties

Electropolymerization of poly(ethylene dioxythiophene) (PEDOT) on activated carbon (AC) was performed using different surfactants such as anionic surfactant (sodium dodecyl sulfate), protonic surfactant (camphor sulphonic acid) and non-ionic surfactant (Triton) in 0.1 M H2SO4. The effects of concentration of different surfactants for electrodeposition of PEDOT on AC were analyzed using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and SEM techniques. Supercapacitors (SC) were fabricated using AC/PEDOT composite electrodes and 0.1 M H2SO4 as an electrolyte. The specific capacitance (Cs) values were calculated using CV at different concentrations of surfactants, electrolytes and variation of potential. The electrolyte containing 0.1 M H2SO4 and 0.02 M camphor sulphonic acid showed to have the highest specific capacitance value of 240 Fg−1 than other surfactant based SCs. Galvanostatic charge/discharge at varying current density were performed on SCs containing different surfactant based electrodes to study their cyclic stability.

Highly flexible and conductive poly (3, 4-ethylene dioxythiophene)-poly (styrene sulfonate) anchored 3-dimensional porous graphene network-based electrochemical biosensor for glucose and pH detection in human perspiration

The patterned LIG flakes are generally not interconnected due to the line gap of the laser ray, leading to lower uniform conductivity and fragile graphene. Thus, the fabrication of a highly conductive and mechanically robust LIG-based biosensing platform remains challenging. In this study, the fabrication of a flexible electrochemical biosensor is reported based on poly (3, 4-ethylene dioxythiophene)-poly (styrene sulfonate) (PEDOT:PSS) modified 3-dimensional (3D) stable porous laser-induced graphene (LIG) for the detection of glucose and pH. PEDOT:PSS was spray-coated on the LIG to improve electrode robustness and deliver uniform electrical conductivity. The as-prepared PEDOT:PSS modified LIG (PP/LIG) was characterized using field-emission scanning electron microscopy (FESEM), x-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and Fourier-transform infrared spectroscopy (FTIR). Platinum and palladium nanoparticles (Pt@Pd) were successfully electrodeposited on PP/LIG, markedly enhancing the electrocatalytic activity for glucose detection. The fabricated biosensor exhibited an excellent amperometric response to glucose with a wide linear range of 10 μM − 9.2 mM, a high sensitivity of 247.3 μAmM−1cm−2, and a low detection limit (LOD) of 3 μM, with high selectivity. In addition, the pH sensor was functionalized by the polyaniline (PANI) on PP/LIG, and it also exhibited excellent potentiometric response with a high sensitivity of 75.06 mV/pH in the linear range of pH 4 − 7. Ultimately, the feasibility of the biosensor was confirmed by the analysis of human perspiration collected during physical exercise. This approach validates the utility of the novel fabrication procedure, and the potential of the LIG-conductive polymer composite for biosensing applications.

Flexible and robust dry electrodes based on electroconductive polymer spray-coated 3D porous graphene for long-term electrocardiogram signal monitoring system

In this study, highly flexible and conductive dry electrodes were developed using a biocompatible polymer (poly (ethylene dioxythiophene): poly (styrene sulfonate), (PEDOT:PSS)) loaded mechanically robust laser-induced graphene (LIG). The circular-shaped LIG electrode with an area of 0.7854 cm2 was directly patterned using a CO2 laser. The PEDOT:PSS was spray-coated on the LIG to enhance the electrical conductivity (164.2 Scm−1) and electrode robustness. The prepared electrodes were characterized by the Field Emission Scanning Electron Microscope (FESEM), X-ray photoelectron spectroscopy (XPS), X-Ray Diffraction (XRD) and Raman Spectra. Experimental results showed that the surface resistivity and skin contact impedance of the electrode were 17.4 Ω/sq and 385 kΩ at 10 Hz. The impedance at the electrode–skin interface was relatively stable, thereby the SNR value of the electrocardiogram (ECG) signal obtained from the fabricated electrodes (12.9 dB) was comparable to Ag/AgCl electrodes (13.3 dB). The electrodes could be effectively and symmetrically attached to the skin since it is thin and flexible. The fabricated electrodes were successfully operated when the participant is resting, and fewer motion artifacts are observed during movement. Finally, ECG signals were demonstrated in a mobile application for real-time and long-term monitoring by attaching participants’ fingers with optimized dry electrodes.

Functionalized Polythiophene Copolymers for Electronic Biomedical Devices

We continue to investigate the design, synthesis, and characterization of electrically and ionically active conjugated polythiophene copolymers for integrating a variety of biomedical devices with living tissue. This paper will describe some of our most recent results, including the development of several new monomers that can tailor the surface chemistry, adhesion, and biointegration of these materials with neural cells. Our efforts have focused on copolymers of 3,4 ethylenedioxythiophene (EDOT), functionalized variants of EDOT (including EDOT-acid and the trifunctional EPh), and dopamine (DOPA). The resulting PEDOT-based copolymers have electrical, optical, mechanical, and adhesive properties that can be precisely tailored by fine tuning the chemical composition and structure. Here we present results on EDOTdopamine bifunctional monomers and their corresponding polymers. We discuss the design and synthesis of an EDOT-cholesterol that combines the thiophene with a biological moiety known to exhibit surface-active behaviour. We will also introduce EDOT-aldehyde and EDOT-maleimide monomers and show how they can be used as the starting point for a wide variety of functionalized monomers and polymers.

All organic graphene oxide and Poly (3, 4-ethylene dioxythiophene) - Poly (styrene sulfonate) coated knitted textile fabrics for wearable electrocardiography (ECG) monitoring

This research approach has been used to enhance and investigate the electrical performance of graphene-based textiles by using an exhaust dyeing method. We developed a highly flexible and wearable e-textile for smart clothing in general and electrocardiogram (ECG) biomedical applications in particular. One step dyeing and reduction of graphene oxide on the textile substrate was accomplished simultaneously at 90 °C in 2 h. After one bath dyeing and reduction of GO, the knitted fabric was coated with conductive polymer PEDOT: PSS via dip coating as a layer by layer (LBL) technique. The resultant knitted textile electrode showed a reduction in sheet resistance from 2.5 MΩ∼140KΩ with increasing (1∼10) dyeing cycles. The electrical conductivity was further the improved, as sheet resistance was decreased from 180KΩ∼120Ω when coated with PEDOT: PSS as compared to pristine PEDOT: PSS and rGO. The results showed that washing has an adverse effect on electrical conductivity. The textile electrode was stable up to 20∼30 washing and 120∼130 bending cycles. The developed electrodes were used as an ECG electrode, with low impedance and higher contact to human skin. The textile electrode showed the enhanced performance to detect the high-quality electrocardiograms (ECG) signals for heart rate in both wet and dry conditions.

Analysis on different detection mechanisms involved in ZnO-based photodetector and photodiodes

The present study reports on the comparison between the ultraviolet (UV) light detection mechanisms in ZnO-based photodetectors and ZnO/PEDOT:PSS hybrid photodiodes. Using spray pyrolysis method, ZnO thin films were deposited upon glass substrates. The deposition temperature was varied from 350 to 425 °C and the physical properties of ZnO thin films were investigated. The structural analysis reveals that all the prepared ZnO thin films have a preferred orientation along the (002) plane with hexagonal wurtzite structure. The morphological analysis reveals that the grains are uniformly distributed. Electrical properties reveal that the ZnO thin film deposited at 425 °C shows a higher carrier concentration of 3.76 × 1016 cm−3 with low electrical resistivity value of 2.59 × 102 Ω cm. For fabrication of UV photodetectors, the optimum ZnO layer with good electrical and optical property was deposited on ITO substrate with substrate temperature maintained at 425 °C. For the fabrication of hybrid UV photodiodes, poly (3,4 ethylene dioxythiophene):poly (styrene sulphonate) (PEDOT:PSS) and zinc oxide (ZnO) was used as the hole and electron transporting layers, respectively. The current–voltage (I–V) and photoresponse switching characteristics under UV light of the fabricated ZnO-based photodetector and photodiodes were studied and the detection mechanisms of such devices were analysed. It was observed that the ZnO-based photodiodes show higher photoresponsivity (R) value of 0.25 A/W with fast photoresponse switching speed.

Hydroxymethyl-Functionalized PEDOT-MeOH:PSS for Perovskite Solar Cells.

Poly(hydroxymethylated-3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT-MeOH:PSS) conducting polymers are synthesized and incorporated in inverted structured perovskite solar cells (PVSCs) as hole transport materials. The highest occupied molecular orbital of PEDOT-MeOH is lowered by adding a hydroxymethyl (-MeOH) functional group to ethylenedioxythiophene (EDOT), and thus, the work function of PEDOT-MeOH:PSS is increased. Additionally, hydrogen bonding can be formed among EDOT-MeOH monomers and between EDOT-MeOH monomers and sulfate groups on PSS, which promotes PEDOT-MeOH chain growth and enhances PSS doping. The electronic, microstructural, and surface morphological properties of PEDOT-MeOH:PSS are modified by changing the amounts of PSS and the ferric oxidizing agent used in the polymerization and by adding ethylene glycol in the postsynthesis treatment. The PVSCs based on ethylene-glycol-treated PEDOT-MeOH:PSS overperform the PVSCs based on commercial PEDOT:PSS because of the better energetic alignment and the enhancement of PEDOT-MeOH:PSS electrical conductivity. This work opens the way to develop new hole transport materials for highly efficient inverted PVSCs.