The effects of solvents on the morphology and sheet resistance in poly(3,4-ethylenedioxythiophene)–polystyrenesulfonic acid (PEDOT–PSS) films

Jönsson, Stina; Birgerson, J.; Crispin, Xavier; Greczyński, Grzegorz; Osikowicz, Wojciech; Gon, A. W. Denier van der; Salaneck, W. R.; Fahlman, Mats

doi:10.1016/s0379-6779(02)01259-6

Cited by 718 publications

(545 citation statements)

References 17 publications

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“…It varies from (1.169 ± 0.003) x 10 1 S/cm to (1.802 ± 0.612) x 10 -3 S/cm as the EDOT:PSS mole ratio is varied from 1:1 to 1:10. The specific electrical conductivity of the PEDOT-PSS increases with EDOT:PSS mole ratio due to the reduction of the insulating PSS shell surrounding the conducting PEDOT-PSS grains, which improves the pathways for charge transport [29,30]. Concerning the influence of the framework Si/Al ratio, we studied a series of zeolites having in common the same structure and charge-balancing cation, but differing in the framework Si/Al ratio in the range of 23-280.…”

Section: Electrical Conductivity Under Air and Nitrogen Exposurementioning

confidence: 99%

Interaction of carbon monoxide with PEDOT-PSS/zeolite composite: effect of Si/Al ratio of ZSM-5 zeolite

Chanthaanont¹,

Sirivat²

2012

E-Polymers

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Abstract:Composites with poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonic acid), PEDOT-PSS, as the matrix containing ZSM-5 zeolites of various Si/Al ratios in the range of 23-280 at 20% (v/v) were fabricated to investigate the effect of Si/Al ratios on electrical conductivity sensitivity responses towards carbon monoxide (CO). The electrical conductivity responses of PEDOT-PSS/ZSM-5 composites were altered due to the available adsorption sites for CO molecules. The electrical conductivity sensitivity to CO increases with decreasing Si/Al ratios. The composites produce irreversible responses when replacing CO with nitrogen. The addition of ZSM-5 zeolites to the pristine PEDOT-PSS improves the electrical conductivity sensitivity of the composites by enhancing the interaction between PEDOT-PSS and CO gas. The composite of ZSM-5 zeolites with a Si/Al ratio equal to 23 gives the highest electrical conductivity sensitivity toward CO.

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Section: Electrical Conductivity Under Air and Nitrogen Exposurementioning

confidence: 99%

Interaction of carbon monoxide with PEDOT-PSS/zeolite composite: effect of Si/Al ratio of ZSM-5 zeolite

Chanthaanont¹,

Sirivat²

2012

E-Polymers

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“…It has been observed that the conductivity increases when certain organic solvents has been added to a PEDOT:PSS water solution [12]. Some examples are dimethyl sulfoxide (DMSO), N,Ndimethylformamide (DMF) [13], glycerol, sorbitol [14][15] and ethylene glycol [16].…”

Section: Introductionmentioning

confidence: 99%

The electronic structure and reflectivity of PEDOT:PSS from density functional theory

et al. 2011

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The geometric and electronic structure of condensed phase organic conducting polymer PEDOT:PSS blends has been investigated by periodic density functional theory (DFT) calculations with a generalized-gradient approximation (GGA) functional, and a plane wave basis set. The influence of the degree of doping of the PEDOT polymer on structural and optical parameters such as the reflectivity, absorbance, conductivity, dielectric function, refractive index and the energy-loss function is studied. A flip from the benzoid to the quinoid structure is observed in the calculations when the neutral PEDOT is doped by negatively charged PSS. Also the optical properties are affected by the doping. In particular, the reflectivity was found to be very sensitive to the degree of doping, where higher doping implies higher reflectivity. The reflectivity is highly anisotropic, with the dominant contribution stemming from the direction parallel to the PEDOT polymer chain.

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“…This increased the conductivity by decreasing the energy barrier between the electrode and the polymeric layer. 8 Another approach was proposed by Yang and Heeger with polyaniline (PAni) used as the transparent anode in an ITO/PAni/poly [2-methoxy-5-(2 0 -ethylhexyloxy)-1,4-p-phenylene vinylene] (MEH-PPV)/Ca diode. 9 The performance of the device increased by 30%-40% and the operating voltage decreased by 30%-50%.…”

mentioning

confidence: 99%

Substrate/semiconductor interface effects on the emission efficiency of luminescent polymers

Therézio¹,

Piovesan²,

Anni³

et al. 2011

Journal of Applied Physics

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Ultrafast thermoreflectance techniques for measuring thermal conductivity and interface thermal conductance of thin films J. Appl. Phys. 108, 094315 (2010) Electric field controlled Faraday rotation in an electro-optic/magneto-optic bilayer Appl. Phys. Lett. 97, 011901 (2010) Linear and nonlinear optical properties of gold nanoparticle-Eu oxide composite thin films J. Appl. Phys. 104, 033110 (2008) Intensity-dependent enhancement of saturable absorption in PbS-Au4 nanohybrid composites: Evidence for resonant energy transfer by Auger recombination Appl. Phys. Lett. 92, 251106 (2008) Raman imaging of doping domains in graphene on SiO2 Appl. Phys. Lett. 91, 241907 (2007) Additional information on J. Appl. Phys. The importance of interface effects for organic devices has long been recognized, but getting detailed knowledge of the extent of such effects remains a major challenge because of the difficulty in distinguishing from bulk effects. This paper addresses the interface effects on the emission efficiency of poly(p-phenylene vinylene) (PPV), by producing layer-by-layer (LBL) films of PPV alternated with dodecylbenzenesulfonate. Films with thickness varying from $15 to 225 nm had the structural defects controlled empirically by converting the films at two temperatures, 110 and 230 C, while the optical properties were characterized by using optical absorption, photoluminescence (PL), and photoluminescence excitation spectra. Blueshifts in the absorption and PL spectra for LBL films with less than 25 bilayers (<40-50 nm) pointed to a larger number of PPV segments with low conjugation degree, regardless of the conversion temperature. For these thin films, the mean free-path for diffusion of photoexcited carriers decreased, and energy transfer may have been hampered owing to the low mobility of the excited carriers. The emission efficiency was then found to depend on the concentration of structural defects, i.e., on the conversion temperature. For thick films with more than 25 bilayers, on the other hand, the PL signal did not depend on the PPV conversion temperature. We also checked that the interface effects were not caused by waveguiding properties of the excited light. Overall, the electronic states at the interface were more localized, and this applied to film thickness of up to 40-50 nm. Because this is a typical film thickness in devices, the implication from the findings here is that interface phenomena should be a primary concern for the design of any organic device.

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The effects of solvents on the morphology and sheet resistance in poly(3,4-ethylenedioxythiophene)–polystyrenesulfonic acid (PEDOT–PSS) films

Cited by 718 publications

References 17 publications

Interaction of carbon monoxide with PEDOT-PSS/zeolite composite: effect of Si/Al ratio of ZSM-5 zeolite

Interaction of carbon monoxide with PEDOT-PSS/zeolite composite: effect of Si/Al ratio of ZSM-5 zeolite

The electronic structure and reflectivity of PEDOT:PSS from density functional theory

Substrate/semiconductor interface effects on the emission efficiency of luminescent polymers

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