Current-voltage characteristics of dendrimer light-emitting diodes

S G Stevenson, I D W Samuel, S V Staton, K A Knights, P L Burn, J H T Williams, Alison B Walker

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have investigated current-voltage (I-V) characteristics of unipolar and bipolar organic diodes that use phosphorescent dendrimers as the emissive organic layer. Through simulation of the measured I-V characteristics we were able to determine the device parameters for each device structure studied, leading to a better understanding of injection and transport behaviour in these devices. It was found that the common practice of assuming injection barriers are equal to the difference between bare electrode work functions and molecular orbital levels is unsuitable for the devices considered here, particularly for gold contacts. The studies confirm that different aromatic units in the dendrons can give significant differences in the charge transporting properties of the dendrimers.
LanguageEnglish
Article number385106
JournalJournal of Physics D: Applied Physics
Volume43
Issue number38
DOIs
StatusPublished - 29 Sep 2010

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Dendrimers
dendrimers
Current voltage characteristics
Light emitting diodes
light emitting diodes
electric potential
Molecular orbitals
Diodes
Gold
injection
Electrodes
molecular orbitals
diodes
gold
orbitals
electrodes
simulation

Cite this

Stevenson, S. G., Samuel, I. D. W., Staton, S. V., Knights, K. A., Burn, P. L., Williams, J. H. T., & Walker, A. B. (2010). Current-voltage characteristics of dendrimer light-emitting diodes. Journal of Physics D: Applied Physics, 43(38), [385106]. https://doi.org/10.1088/0022-3727/43/38/385106

Current-voltage characteristics of dendrimer light-emitting diodes. / Stevenson, S G; Samuel, I D W; Staton, S V; Knights, K A; Burn, P L; Williams, J H T; Walker, Alison B.

In: Journal of Physics D: Applied Physics, Vol. 43, No. 38, 385106, 29.09.2010.

Research output: Contribution to journalArticle

Stevenson, SG, Samuel, IDW, Staton, SV, Knights, KA, Burn, PL, Williams, JHT & Walker, AB 2010, 'Current-voltage characteristics of dendrimer light-emitting diodes', Journal of Physics D: Applied Physics, vol. 43, no. 38, 385106. https://doi.org/10.1088/0022-3727/43/38/385106
Stevenson SG, Samuel IDW, Staton SV, Knights KA, Burn PL, Williams JHT et al. Current-voltage characteristics of dendrimer light-emitting diodes. Journal of Physics D: Applied Physics. 2010 Sep 29;43(38). 385106. https://doi.org/10.1088/0022-3727/43/38/385106
Stevenson, S G ; Samuel, I D W ; Staton, S V ; Knights, K A ; Burn, P L ; Williams, J H T ; Walker, Alison B. / Current-voltage characteristics of dendrimer light-emitting diodes. In: Journal of Physics D: Applied Physics. 2010 ; Vol. 43, No. 38.
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