- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Effect of H?SO? Solution Treating on the Adhesion, Charge Transfer and Catalytic Performance of Screen‐Printed PEDOT:PSS
摘要： Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films screen-printed on fluorine-doped tin oxide (FTO) substrates, to improve their charge transfer efficiency. Different H2SO4 solutions including concentrated H2SO4 and H2SO4 diluted with H2O or dimethyl sulfoxide (DMSO) were adopted during the post-treatment. The adhesion of the as-treated films was evaluated by adhesive tape peeling tests, the surface morphology and vertical charge transfer from the films to the substrates were investigated by current-sensing atomic force microscopy, and the catalytic activities toward I3- reduction of PEDOT:PSS films were characterized via electrochemical measurements. It is discovered that selecting proper H2SO4 solutions is crucial to improve the charge transfer efficiency and catalytic performance while maintaining the reliable adhesion of the film on the substrates, and H2SO4/DMSO performs best as the solution for post-treatment. A schematic mechanism was proposed based on different interactions among solution, PEDOT:PSS and the substrate in the case of various post-treatment solutions.
关键词： charge transfer,poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate),screen printing,catalysis,post-treatment
更新于2025-09-23 15:23:52
-
Synthesis and characterization of nanofiber-type hydrophobic organic materials as electrodes for improved performance of PVDF-based piezoelectric nanogenerators
摘要： Poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives are synthesized by oxidative polymerization using sodium dodecyl sulfate (SDS) as an anionic surfactant dopant. The resulting polymeric materials featuring nanofiber-type one-dimensional (1D) structures are identified as poly(2-butyl-2,3-dihydrothieno[3,4-b][1,4]dioxine:dodecyl sulfate (PEDOT-C4:DS) and poly(2-hexyl-2,3-dihydrothieno[3,4-b][1,4]dioxine:dodecyl sulfate (PEDOT-C6:DS). The ratio of the DS anion doped into PEDOT-C4:DS and PEDOT-C6:DS is 0.16 and 0.23, respectively. The contact angle of water on the PEDOT-C4:DS and PEDOT-C6:DS films is 76.6° and 87.7°, respectively, showing hydrophobic properties similar to that with water on PVDF. It facilitated the fully uniform film formation due to excellent surface matching. Peeling force of PEDOT-C4:DS and PEDOT-C6:DS is stronger than the one of PEDOT:PSS-CNT composite. GIWAX analysis showed that PEDOT-C4:DS formed the highly ordered edge-on structure and PEDOT-C6:DS formed the bimodal orientation consisting of edge-on structure mainly and face-on structure slightly. The electrical conductivity (σPEDOT-C4:DS=50.0 S cm-1) of PEDOT-C4:DS is 41.7 times higher than that of PEDOT:PSS (σPEDOT:PSS=1.2 S cm-1). The output signals (maximum voltages/currents) of piezoelectric nanogenerators (PNGs, electrode/PVDF/electrode) using these materials as electrodes are PNG-1 (PEDOT:PSS-CNT composite) 1.25 V/128.5 nA, PNG-2 (PEDOT-C4:DS) 1.54 V/166.0 nA, and PNG-3 (PEDOT-C6:DS) 1.49 V/159.0 nA. Of these, PNG-2 & PNG-3 show maximum piezoelectric output power of 63.0 nW and 59.9 nW at 9 MΩ compared to PNG-1 (41.0 nW at 10 MΩ). They are enhanced up to 53.7%. The excellent surface matching between a piezoelectric active material and an electrode material leads to high output power.
关键词： 4-ethylenedioxythiophene) derivative,poly(3,nanofibrillar network,piezoelectric nanogenerator,nanofiber,hydrophobicity
更新于2025-09-23 15:23:52
-
Quantification of DNA by a Thermal-Durable Biosensor Modified with Conductive Poly(3,4-ethylenedioxythiophene)
摘要： The general clinical procedure for viral DNA detection or gene mutation diagnosis following polymerase chain reaction (PCR) often involves gel electrophoresis and DNA sequencing, which is usually time-consuming. In this study, we have proposed a facile strategy to construct a DNA biosensor, in which the platinum electrode was modified with a dual-film of electrochemically synthesized poly(3,4-ethylenedioxythiophene) (PEDOT) resulting in immobilized gold nanoparticles, with the gold nanoparticles easily immobilized in a uniform distribution. The DNA probe labeled with a SH group was then assembled to the fabricated electrode and employed to capture the target DNA based on the complementary sequence. The hybridization efficiency was evaluated with differential pulse voltammetry (DPV) in the presence of daunorubicin hydrochloride. Our results demonstrated that the peak current in DPV exhibited a linear correlation the concentration of target DNA that was complementary to the probe DNA. Moreover, the electrode could be reused by heating denaturation and re-hybridization, which only brought slight signal decay. In addition, the addition of the oxidized form of nicotinamide adenine dinucleotide (NAD+) could dramatically enhance the sensitivity by more than 5.45-fold, and the limit-of-detection reached about 100 pM.
关键词： poly(3,4-ethylenedioxythiophene),gold nanoparticle,electron transfer mediate,DNA biosensor
更新于2025-09-23 15:21:21
-
Electrochemical and optical characterization of a multielectrochromic copolymer based on 3,4-ethylenedioxythiophene and functionalized dithienylpyrrole derivative
摘要： A novel conjugated copolymer, namely poly(3,4-ethylenedioxythiophene-co-1-(3,5-bis(trifluoromethyl)phenyl)-2,5-di(thiophen-2-yl)-1H-pyrrole) (P(EDOT-co-1)) was synthesized via electropolymerization method from a mixture of 3,4-ethylenedioxythiophene and 1-(3,5-bis(trifluoromethyl)phenyl)-2,5-di(thiophen-2-yl)-1H-pyrrole comonomers. The corresponding copolymer has an optical band gap of 1.7 eV and 41% optical contrast at 525 nm with a coloration efficiency of 258 cm2/C and 1.4 s switching time. The copolymer has a multi-electrochromic behavior: It has dark purple, purple, gray, green and cyan colors at different oxidation states. Electrochemical stability of P(EDOT-co-1) copolymer was also investigated and it was observed that the copolymer retained 86% of its stability under ambient conditions in the presence of oxygen (without purging the electrolyte solution with any inert gas) according to the current density and 83% according to the deposited charge even after 1000 redox cycles.
关键词： Copolymerization,SNS,3,4-Ethylenedioxythiophene,EDOT,Multielectrochromism, dithienylpyrrole,Electropolymerization,1,4-di(thiophen-2-yl)butane-1,4-dione,3,5-bis(trifluoromethyl)benzenamine
更新于2025-09-23 15:21:01
-
High indoor performance of flexible organic photovoltaics using polymer electrodes
摘要： Indoor organic photovoltaics (OPVs) have gained tremendous attention due to their unique optoelectronic properties under dim and spectrally-limited indoor light conditions. Moreover, their excellent flexible features make them more suitable for powering various indoor electronic devices than other photovoltaic systems. In this article, we demonstrate the indoor photovoltaic performance of poly(3-hexylthiophene):indene-C60 bisadduct-based flexible OPVs with polymeric electrodes in comparison with reference OPVs with indium tin oxide (ITO) electrodes. For the flexible OPVs, poly (3, 4-ethylenedioxythiophene): poly (styrene-sulfonic acid)-based polymeric electrodes were demonstrated on a polyethylene naphthalate substrate with a polyvinyl alcohol buffer layer. The OPV with the polymeric electrode produced an average power conversion efficiency (PCE) of 11.1 ± 0.1%, whereas the reference device with the ITO electrode exhibited a PCE of 8.8 ± 0.1% under a 500-lx-light emitting diode condition. The flexible OPVs also exhibited superior flexibility over reference OPVs by retaining their PCE up to ~ 85% even after 500 bending cycles in air, whereas the reference OPVs declined to ~ 80% of their PCE under the same bending conditions.
关键词： Organic photovoltaics,Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate,Polymeric electrode,Indoor application,Parasitic resistance effects
更新于2025-09-23 15:19:57
-
Metal Free Acid-Mediated Solid-State Polymerization and Processability of Polymers Based on 3,4-Alkylenedioxythiophenes
摘要： The present article reports metal free acid-mediated polymerization of 3,4-alkylenedioxythiophenes in a solvent free medium and processability of insoluble polymers. It also describes structural variants and functional aqueous dispersions based on 3,4-alkylenedioxythiophenes. Polymers were processed by dispersing the insoluble polymer powders in aqueous media using polymeric aromatic surfactant (polystyrenesulfonate, PSS) and aliphatic surfactant (sodiumdodecylsulfonate, SDS), respectively. The effect of surfactant on particle size, stability, and conductivity of the dispersions was investigated in detail. Polymer particles in SDS-based dispersions tend to agglomerate which resulted enhanced conductivity of the thin films. Electrochemical studies revealed that the polymers are electroactive in nature and are transparent in oxidized state. The electrochromic contrast between the oxidized and reduced states of the polymers was in the range of 40–46%.
关键词： ProDOT,aqueous dispersion,3,4-ethylenedioxythiophene,PEDOT:PSS,conjugated polymers
更新于2025-09-19 17:15:36
-
Ultrathin PEDOT:PSS Enables Colorful and Efficient Perovskite Light-Emitting Diodes
摘要： Recently, metal halide perovskite light-emitting diodes (Pero-LEDs) have achieved significant improvement in device performance, especially for external quantum efficiency (EQE). And EQE is mostly determined by internal quantum efficiency of the emitting material, charge injection balancing factor (ηc), and light extraction efficiency (LEE) of the device. Herein, an ultrathin poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (UT-PEDOT:PSS) hole transporter layer is prepared by a water stripping method, and the UT-PEDOT:PSS can enhance ηc and LEE simultaneously in Pero-LEDs, mostly due to the improved carrier mobility, more matched energy level alignment, and reduced photon loss. More importantly, the performance enhancement from UT-PEDOT:PSS is quite universal and applicable in different kinds of Pero-LEDs. As a result, the EQEs of Pero-LEDs based on 3D, quasi-3D, and quasi-2D perovskites obtain enhancements of 42%, 87%, and 111%, and the corresponding maximum EQE reaches 17.6%, 15.0%, and 6.8%, respectively.
关键词： poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate),perovskites light-emitting diodes,outcoupling efficiency,light-emitting diodes
更新于2025-09-19 17:13:59
-
Highly Efficient Flexible Perovskite Light-Emitting Diodes Using Modified PEDOT:PSS Hole Transport Layer and Polymer-Silver Nanowires Composite Electrode
摘要： Metal halide perovskites have been actively studied as promising materials in optoelectronic devices because of their superior optical and electrical properties, and have also shown considerable potential for flexible devices because of their good mechanical properties. However, the large hole injection barrier and exciton quenching between the perovskite emitter and poly(3,4-ethylenedioxythiophene):poly-styrene sulfonate (PEDOT:PSS) can lead to the reduction in device efficiency. Here, a nonconductive fluorosurfactant, Zonyl FS-300 (Zonyl), is introduced into the PEDOT:PSS hole transport layer, which reduces the hole injection barrier and exciton quenching at the PEDOT:PSS/perovskite interface. Moreover, a flexible perovskite light-emitting diode with a polymer–silver nanowire composite electrode is demonstrated, showing a maximum current efficiency (CEmax) of 17.90 cd A–1, and this is maintained even after 1,000 cycles of bending with a 2.5 mm bending radius.
关键词： flexible perovskite light-emitting diodes,hole transport layer,flexible electrode,silver nanowires (AgNWs),poly(3,4-ethylenedioxythiophene):poly-styrene sulfonate (PEDOT:PSS)
更新于2025-09-16 10:30:52
-
Unrevealing Charge Carrier Selective Layer in Silicon Heterojunction Solar Cells via Multifunctional Atomic Force Probes
摘要： The current silicon solar cell with a record efficiency is based on heterojunction contacts that offer carrier selectivity as well as surface passivation simultaneously. One remaining challenge with heterocontacts is the balance between carrier extraction and surface passivation. Here, it is demonstrated that the heterojunction of n-type silicon (N–Si) with the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) removes this trade-off, utilizing the strong depletion of PEDOT:PSS to realize the excellent carrier selectivity. The near-field optical contrast and surface potential distributions of the PEDOT:PSS/N–Si heterojunction via multifunctional atomic force probes are mapped for the first time. Interestingly, a low dielectric value region is observed in N–Si by using scattering-type scanning near-field optical microscopy on the junction cross-section. A special PEDOT:PSS slope is further fabricated to characterize the dielectric value and surface potential in the PEDOT:PSS side. By combining s-SNOM and scanning Kelvin probe microscopy, a special region in PEDOT:PSS is observed with a sharp surface potential drop and low dielectric value. The results suggest the existence of space charge regions both in N–Si and PEDOT:PSS at the interface. These findings contribute the understanding of the physical properties of the silicon heterojunction and promise potential routes to enhance device efficiency.
关键词： poly(3,4-ethylenedioxythiophene):poly (styrene sulfonate)/n-type silicon interface,scanning Kelvin probe microscopy,carrier redistribution,infrared scattering-type scanning near-field optical microscope
更新于2025-09-11 14:15:04
-
Reduction of specific contact resistance between the conducting polymer PEDOT:PSS and a metal electrode by addition of a second solvent during film formation and a post-surface treatment
摘要： The contact resistance at conducting polymer-electrode junctions could substantially affect device performance because electrical currents or signals generated in the polymer devices must be transferred in their final form through the junctions to the connected load or devices. We report here the specific contact resistance between the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and a metal electrode as measured by a transmission line technique. Toward developing printed electronics that do not require vacuum processes, we focus on the specific contact-resistance, rc, between PEDOT:PSS films and metal pastes. Addition of a second solvent such as ethylene glycol (EG), poly-ethylene glycol (PEG), and dimethyl sulfoxide (DMSO) to PEDOT:PSS solution for film formation induced a significant reduction of rc together with an enhancement of electrical conductivity. A surface treatment using EG or DMSO on electrode areas of the film also decreased rc at the PEDOT:PSS-Ag paste junction to the value at the PEDOT:PSS-Ag junction formed by electron-beam evaporation. The mechanism of reduction of rc is discussed based on morphology of the PEDOT:PSS film.
关键词： Conducting polymers,Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate),Specific contact-resistance
更新于2025-09-10 09:29:36