Physics of organic alloy light-emitting diodes

Jun Shen; Vi-En Choong; Jie Yang; Song Shi; Franky So

doi:10.1117/12.386373

19 May 2000 Physics of organic alloy light-emitting diodes

Jun Shen, Vi-En Choong, Jie Yang, Song Shi, Franky So

Proceedings Volume 3939, Organic Photonic Materials and Devices II; (2000) https://doi.org/10.1117/12.386373
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

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.

Citation Download Citation

Jun Shen, Vi-En Choong, Jie Yang, Song Shi, and Franky So "Physics of organic alloy light-emitting diodes", Proc. SPIE 3939, Organic Photonic Materials and Devices II, (19 May 2000); https://doi.org/10.1117/12.386373

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