Study of PEDOT:PSS-SnO2 nanocomposite film as an anode for polymer electronics

Abstract

Poly(3,4-ethylenedioxythiophene) oxidized with poly(4-styrenesulfonate)(PEDOT:PSS) is a candidate material for applications in molecular electronics, such as organic field effect devices, organic photovoltaics, and organic light emitting devices. The properties of 3.5-4.0 nm sized SnO 2 nanoparticles doped PEDOT:PSS films were investigated for anode application. Sheet resistance was decreased and rms roughness was slightly increased with the incorporation of SnO 2 nanoparticles. However, the connectivity of conducting grains was improved by the plasticizing effect of surface -OH groups of SnO 2 nanoparticle. Using photoemission spectroscopy and near edge X-ray absorption fine structure (NEXAFS), the electronic structure of the films is studied comparatively on the C 1s NEXAFS, secondary electron emission cut off, and valence band spectra. The start of electron emission retarded and valence band maximum was increased in the PEDOT:PSSSnO 2 nanocomposite films. These changes in the electronic structure resulted from emitted electron screening of corehole in the PEDOT:PSS energy band and electron donation of SnO 2 nanoparticles.

Enhanced electroluminescent efficiency with ionic liquid doped into PEDOT:PSS hole-injecting layer

“…On account of lowering the barrier for hole injection, improving the film-processing ability of organic layers and protecting organic electroluminescent layer from the diffusion of oxygen-containing species in the ITO substrate, the electroluminescent performance is able to be effectively enhanced by the application of PEDOT:PSS hole-injecting layer [5e7]. Besides, PEDOT:PSS layer is also secondarily doped to significantly enhance the conductivity for more effective applications in optoelectronic devices [3,8,9], such as WO 3 [10e12], SnO 2 [13,14], Fe 3 O 4 [15], surfactants [16,17], etc. Ionic liquids (IL) are also found to be added at the large content (~40e70%) into PEDOT:PSS for conductivity enhancement [18e21], which reaches up to 136 S cm À1 by the addition of 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm]BF 4 ) [20] or to 2084 S cm À1 of 1-ethyl-3-methylimidazolium tetracyanoborate ([EMIm]TCB) [21].…”

New 2-in-1 Polyelectrolyte Step-by-Step Film Buildup without Solution Alternation: From PEDOT-PSS to Polyelectrolyte Complexes

“…To conclude this first part of the paper, the 2-in-1 method applied to PEDOT-PSS is able to provide films of tailored nanothickness (2 nm per deposition step) with the same surface morphology 55−59 and at least the same low roughness 57,59 as the thicker films obtained after a unique deposition. Until now, nanofilms of PEDOT-PSS were obtained by the lbl method by alternating the negative PEDOT-PSS with a positively charged polyelectrolyte or with positively charged particles.…”

The Interaction of CO to the Co(salen) Complex in to PEDOT:PSS Film and Sensor Application

“…13,14 PEDOT:PSS has been used as a base substrate for gas sensors because it has several advantages in comparison with other conductive polymers, namely, high conductivity, high stability, abundance, and low cost. [15][16][17][18] PEDOT:PSS has a polar structure where PEDOT is positively charged and PSS is negatively charged. Therefore, PEDOT:PSS is more sensitive to polar species such as water vapor, NO and CO. 19 There are some reports on the incorporation of metals, metal oxides, and organometallic complexes into intrinsically conductive polymers to enhance the electron or ion mobility and improve conductivity and stability.…”