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Proceedings Paper

Physics of organic alloy light-emitting diodes
Author(s): Jun Shen; Vi-En Choong; Jie Yang; Song Shi; Franky So
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Paper Abstract

We present theoretical models and experimental results on the carrier transport mechanisms in single-layer organic alloy light emitting diodes. The typical organic alloy consists of a mixture of electron and hole transporting materials. The device shows significant improvement in lifetime at room and elevated temperatures. The improvement is attributed to the elimination of the heterointerface and the minimization of the formation of unstable tris-8- hydroxyquinoline) aluminum (Alq3) cations. The efficiency is comparable to those of their heterojunction counterparts. Balanced bipolar carrier injection and transport are made possible by adjusting the alloy composition and doping. We model the device by assigning individual conduction channels to each type of material. The sensitivity of the diode efficiency on several key parameters is studied.

Paper Details

Date Published: 19 May 2000
PDF: 8 pages
Proc. SPIE 3939, Organic Photonic Materials and Devices II, (19 May 2000); doi: 10.1117/12.386373
Show Author Affiliations
Jun Shen, Arizona State Univ. (United States)
Vi-En Choong, Motorola (United States)
Jie Yang, Arizona State Univ. (United States)
Song Shi, Motorola (United States)
Franky So, Motorola (United States)


Published in SPIE Proceedings Vol. 3939:
Organic Photonic Materials and Devices II
Donal D. C. Bradley; Bernard Kippelen, Editor(s)

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