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

THIN SOLID FILMS

卷:560

Article; Proceedings Paper

Kalfagiannis, N.^1,2  Karagiannidis, P. G.¹  Pitsalidis, C.¹  Hastas, N.³  Panagiotopoulos, N. T.⁴  Patsalas, P.⁴  Logothetidis, S.¹ 

[1] Aristotle Univ Thessaloniki, Dept Phys, Lab Thin Films Nanosyst & Nanometrol LTFN, GR-54124 Thessaloniki, Greece

[2] Nottingham Trent Univ, Sch Sci & Technol, Nottingham NG11 8NS, England

[3] Aristotle Univ Thessaloniki, Dept Phys, GR-54124 Thessaloniki, Greece

[4] Univ Ioannina, Dept Mat Sci & Engn, GR-45110 Ioannina, Greece

关键词: Surface plasmon resonance;    Enhanced scattering;    Hybrid buffer layers;    PEDOT:PSS films;    Silver nanoparticles;   

DOI  :  10.1016/j.tsf.2014.01.032

来源: Elsevier

【 摘 要 】

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. Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.

【 授权许可】

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