Dissociation of iridium(III) phosphorescent emitters upon adsorption on Cu(110) revealed by scanning tunneling microscopy

Henkjan Gersen; Renald Schaub; Wei Xu; Ivan Stensgaard; Erik Laegsgaard; Trolle Linderoth; Flemming Besenbacher; Md K Nazeeruddin; Michael Graetzel

doi:10.1063/1.2424675

Dissociation of iridium(III) phosphorescent emitters upon adsorption on Cu(110) revealed by scanning tunneling microscopy

Henkjan Gersen, Renald Schaub, Wei Xu, Ivan Stensgaard, Erik Laegsgaard, Trolle Linderoth, Flemming Besenbacher, Md K Nazeeruddin, Michael Graetzel

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Abstract

The phosphorescent emitters used in organic light emitting diodes (OLEDs) play a crucial role for tuning the color and the luminescence intensity. The authors have investigated by scanning tunneling microscopy the adsorption of iridium(III) phosphorescent emitter molecules used in OLEDs on a partly oxidized Cu(110) surface. Surprisingly they find that 50% of the emitters have dissociated upon adsorption at the substrate. The findings suggest that the decrease in the lifetime of OLEDs, which are manufactured by vacuum vaporization technique, is due to the dissociation of emitter molecules present in the device.

Original language	English
Pages (from-to)	264102
Number of pages	3
Journal	Applied Physics Letters
Volume	89
Issue number	26
DOIs	https://doi.org/10.1063/1.2424675
Publication status	Published - Dec 2006

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title = "Dissociation of iridium(III) phosphorescent emitters upon adsorption on Cu(110) revealed by scanning tunneling microscopy",

abstract = "The phosphorescent emitters used in organic light emitting diodes (OLEDs) play a crucial role for tuning the color and the luminescence intensity. The authors have investigated by scanning tunneling microscopy the adsorption of iridium(III) phosphorescent emitter molecules used in OLEDs on a partly oxidized Cu(110) surface. Surprisingly they find that 50% of the emitters have dissociated upon adsorption at the substrate. The findings suggest that the decrease in the lifetime of OLEDs, which are manufactured by vacuum vaporization technique, is due to the dissociation of emitter molecules present in the device.",

author = "Henkjan Gersen and Renald Schaub and Wei Xu and Ivan Stensgaard and Erik Laegsgaard and Trolle Linderoth and Flemming Besenbacher and Nazeeruddin, {Md K} and Michael Graetzel",

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T1 - Dissociation of iridium(III) phosphorescent emitters upon adsorption on Cu(110) revealed by scanning tunneling microscopy

AU - Gersen, Henkjan

AU - Schaub, Renald

AU - Xu, Wei

AU - Stensgaard, Ivan

AU - Laegsgaard, Erik

AU - Linderoth, Trolle

AU - Besenbacher, Flemming

AU - Nazeeruddin, Md K

AU - Graetzel, Michael

PY - 2006/12

Y1 - 2006/12

N2 - The phosphorescent emitters used in organic light emitting diodes (OLEDs) play a crucial role for tuning the color and the luminescence intensity. The authors have investigated by scanning tunneling microscopy the adsorption of iridium(III) phosphorescent emitter molecules used in OLEDs on a partly oxidized Cu(110) surface. Surprisingly they find that 50% of the emitters have dissociated upon adsorption at the substrate. The findings suggest that the decrease in the lifetime of OLEDs, which are manufactured by vacuum vaporization technique, is due to the dissociation of emitter molecules present in the device.

AB - The phosphorescent emitters used in organic light emitting diodes (OLEDs) play a crucial role for tuning the color and the luminescence intensity. The authors have investigated by scanning tunneling microscopy the adsorption of iridium(III) phosphorescent emitter molecules used in OLEDs on a partly oxidized Cu(110) surface. Surprisingly they find that 50% of the emitters have dissociated upon adsorption at the substrate. The findings suggest that the decrease in the lifetime of OLEDs, which are manufactured by vacuum vaporization technique, is due to the dissociation of emitter molecules present in the device.

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DO - 10.1063/1.2424675

M3 - Article

SN - 0003-6951

VL - 89

SP - 264102

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 26

ER -

Dissociation of iridium(III) phosphorescent emitters upon adsorption on Cu(110) revealed by scanning tunneling microscopy

Abstract

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