Performance of hybrid buffer Poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) layers doped with plasmonic silver nanoparticles

Kalfagiannis, N. ORCID: 0000-0002-4030-5525, Karagiannidis, P.G., Pitsalidis, C., Hastas, N., Panagiotopoulos, N.T., Patsalas, P. and Logothetidis, S., 2014. Performance of hybrid buffer Poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) layers doped with plasmonic silver nanoparticles. Thin Solid Films, 560, pp. 27-33. ISSN 0040-6090

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Abstract

We compare the performance of a typical hole transport layer for organic photovoltaics (OPVs), Poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) thin film with a series of PEDOT:PSS layers doped with silver (Ag) nanoparticles (NPs) of various size distributions. These hybrid layers have attracted great attention as buffer layers in plasmonic OPVs, although there is no report up to date on their isolated performance. In the present study we prepared a series of PEDOT:PSS layers sandwiched between indium tin oxide (ITO) and gold (Au) electrodes. Ag NPs were deposited on top of the ITO by electron beam evaporation followed by spin coating of PEDOT:PSS. Electrical characterization performed in the dark showed linear resistive behavior for all the samples; lower resistance was observed for the hybrid ones. It was found that the resistivity of the samples decreases with increasing the particle's size. A substantial increase of the electric field between the ITO and the Au electrodes was seen through the formation of current paths through the Ag NPs. A striking observation is the slight increase in the slope of the current density versus voltage curves when measured under illumination for the case of the plasmonic layers, indicating that changes in the electric field in the vicinity of the NP due to plasmonic excitation is a non-vanishing factor.

Item Type: Journal article
Publication Title: Thin Solid Films
Creators: Kalfagiannis, N., Karagiannidis, P.G., Pitsalidis, C., Hastas, N., Panagiotopoulos, N.T., Patsalas, P. and Logothetidis, S.
Publisher: Elsevier
Date: 17 January 2014
Volume: 560
ISSN: 0040-6090
Identifiers:
NumberType
10.1016/j.tsf.2014.01.032DOI
Divisions: Schools > School of Science and Technology
Depositing User: Jonathan Gallacher
Date Added: 11 Apr 2017 10:00
Last Modified: 09 Jun 2017 14:14
URI: http://irep.ntu.ac.uk/id/eprint/30499

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