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Interfacial dipole dynamics of light-emitting diodes incorporating a poly(amidoamine) dendrimer monolayer

Winroth, G; Fenwick, O; Scott, MA; Yip, D; Howorka, S; Cacialli, F; (2010) Interfacial dipole dynamics of light-emitting diodes incorporating a poly(amidoamine) dendrimer monolayer. APPL PHYS LETT , 97 (4) , Article 043304. 10.1063/1.3459964.

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Abstract

We investigate the effects induced by a nonconjugated self-assembled monolayer of poly(amidoamine) (PAMAM) on the work function of thermally evaporated Al-electrodes. We compare results from Kelvin probe measurement of the electrodes work function with electroabsorption characterization of the built-in voltage of polymer light-emitting diodes incorporating them. Interestingly, we find that the PAMAM monolayer decreases the work function by 0.4 eV in a Kelvin probe measurement but that the dipole induced by the PAMAM monolayer is altered by biasing, and that it exhibits a hysteretic behavior in a cyclic voltage scan. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3459964]

Type:Article
Title:Interfacial dipole dynamics of light-emitting diodes incorporating a poly(amidoamine) dendrimer monolayer
DOI:10.1063/1.3459964
Keywords:light emitting diodes, monolayers, polymers, self-assembly, work function, INDIUM-TIN OXIDE, ELECTRON TRANSPORTING LAYERS, CONJUGATED POLYMERS, SIDE-GROUPS, ION MOTION, FILMS, ELECTROLUMINESCENCE, INJECTION, DEVICES, ANODES
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy

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