Conductivity enhancement of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) films post-spincasting

Abstract

Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) thin films on indium tin oxide and glass substrates have been fabricated and subjected to a non-adiabatic annealing process. The films showed subtle changes in their structure and optical properties as well as an increase in conductivity due to the effects of rapid thermal annealing. Through a combination of Raman spectroscopy, X-ray photoelectron spectroscopy and atomic force microscopy studies in conjunction with electrical characterization, and four-point probe measurements, material enrichment of conductive PEDOT domains at the polymer-metal interface have been demonstrated, which well explains the surface conductivity improvement of a thin film of PEDOT:PSS after annealing.

Functional solid additive modified PEDOT:PSS as an anode buffer layer for enhanced photovoltaic performance and stability in polymer solar cells

“…1(B,C)). The expanded-coil conformation retains the two PEDOT rings in the same plane to facilitate the π-electron delocalization to cause increase in the conductivity of the PEDOT:PSS@DOH film27. Hence, we presume that the inclusion of DOH into PEDOT:PSS, is likely to provide additional charge carriers28.…”

Significantly improved photovoltaic performance in polymer bulk heterojunction solar cells with graphene oxide /PEDOT:PSS double decked hole transport layer

“…A strong vibrational band observed at 1440 cm −1 is attributed to PEDOT and related to symmetric Cα = C β (−O) stretching mode. In addition, the following bands are related to PEDOT vibrational modes such as: 1562 cm −1 is ascribed to Cα = C β asymmetrical stretching, 1364 cm −1 to C β− C β stretching deformations and 1255 cm −1 to C α− C α inter-ring stretching vibrations3637. The peaks at 986 and 573 cm −1 correspond to the oxyethylene ring deformation38.…”

PEDOT:PSS as an Alternative Hole Selective Contact for ITO-Free Hybrid Crystalline Silicon Solar Cell

“…Two doublet peaks are distinguishable, centered at 164.2 ± 0.1 and 168.5 ± 0.1 eV, each with a spin-orbit splitting of 1.2 eV and a peak area ratio (2p 3/2 /2p 1/2 ) of 2:1. These binding energies closely match those referenced in the literature, with the low energy peak belonging to the PEDOT component and the high energy peak to PSS [22], [23]. From the integrated peak areas of each component, the calculated PSS/PEDOT ratios were 2.4 for HTL Solar and 1.9 for PH1000.…”