DOI: 10.1063/1.1565506. Organic molecular films on gold versus conducting polymer: Influence of injection barrier height and morphology on current

Organic molecular films on gold versus conducting polymer: Influence of injection barrier height and morphology on current–voltage characteristics

10.1063/1.1565506

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

The current–voltage characteristics I(V) of model organic devices are studied under ultra-high-vacuum conditions. Active materials are N,N′-bis-(1-naphthyl)-N,N′-diphen-yl1-1,1-biphenyl1-4,4′-diamine (α-NPD) and pentacene, electrode materials are polycrystalline Au and the conductive polymer poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS). Despite a similar work function of electrode material surfaces (∼5 eV), hole injection from PEDOT/PSS is significantly more efficient than from Au, due to a smaller hole injection barrier. Hole injection characteristics from Au electrodes for devices made from α-NPD are independent of deposition sequence and substrate used. Pentacene devices exhibit serious asymmetries in that respect. These are caused by a strong dependence of morphology and preferred molecular orientation on the substrate for the crystalline material.

Bibliography

Koch, N., Elschner, A., Schwartz, J., & Kahn, A. (2003). Organic molecular films on gold versus conducting polymer: Influence of injection barrier height and morphology on currentâvoltage characteristics. Applied Physics Letters, 82(14), 2281â2283.

Authors 4

N. Koch (first)
A. Elschner (additional)
J. Schwartz (additional)
A. Kahn (additional)

References 14 Referenced 90

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{'key': '2024020400143158400_r4'}
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Dates

Type	When
Created	22 years, 4 months ago (April 3, 2003, 6:04 p.m.)
Deposited	1 year, 6 months ago (Feb. 3, 2024, 7:14 p.m.)
Indexed	3 days, 21 hours ago (Aug. 20, 2025, 8:25 a.m.)
Issued	22 years, 4 months ago (April 7, 2003)
Published	22 years, 4 months ago (April 7, 2003)
Published Print	22 years, 4 months ago (April 7, 2003)

Funders 0

None

BibTeX

@article{Koch_2003, title={Organic molecular films on gold versus conducting polymer: Influence of injection barrier height and morphology on current–voltage characteristics}, volume={82}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.1565506}, DOI={10.1063/1.1565506}, number={14}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Koch, N. and Elschner, A. and Schwartz, J. and Kahn, A.}, year={2003}, month=apr, pages={2281–2283} }

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