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Proceedings Paper

Optically-detected charge density dynamics in organic light emitting diodes (OLEDs)
Author(s): Marc Sims; Ian D. Parker
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Paper Abstract

Electro-modulation (EM) is used to measure interfacial hole densities in operating OLEDs. This in-situ optical probe has provided us with a measure of relative hole and electron currents in a wide range of OLED structures. Insight to the dynamics of interfacial hole densities allows an assessment of the longterm stability of electron-hole balance, and therefore helps greatly with the identification of electroluminescence (EL) degradation mechanisms. Here, we limit the investigation to NPB/AlQ3 OLEDs, but note that the technique is versatile, and can be readily adapted to a wide range OLED structures, especially those comprising arylamine -based hole transport materials and interlayers.

Paper Details

Date Published: 27 August 2009
PDF: 12 pages
Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 74150D (27 August 2009); doi: 10.1117/12.829104
Show Author Affiliations
Marc Sims, DuPont Displays Inc, (United States)
Ian D. Parker, DuPont Displays Inc, (United States)


Published in SPIE Proceedings Vol. 7415:
Organic Light Emitting Materials and Devices XIII
Franky So; Chihaya Adachi, Editor(s)

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