Winroth, G and Fenwick, O and Scott, MA and Yip, D and Howorka, S and 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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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]
|Title:||Interfacial dipole dynamics of light-emitting diodes incorporating a poly(amidoamine) dendrimer monolayer|
|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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