Bisindolylmaleimides derivatives for effective EL materials

Xiaochuan Li; Jiangshan Chen; Dongge Ma; Qiong Zhang; He Tian

doi:10.1117/12.600901

12 January 2005 Bisindolylmaleimides derivatives for effective EL materials

Xiaochuan Li, Jiangshan Chen, Dongge Ma, Qiong Zhang, He Tian

Proceedings Volume 5632, Light-Emitting Diode Materials and Devices; (2005) https://doi.org/10.1117/12.600901
Event: Photonics Asia, 2004, Beijing, China

Abstract

Two bisindolylmaleimide derivatives were prepared in good yields, characterized and successfully employed in the fabrication of organic light-emitting-diodes (OLEDs). The absorption spectra and photoluminescence spectra of the compounds in solution and in thin film were also measured and they show larger Stokes shifts (>100nm). With the electroluminescence devices configured as ITO/NPB/dopant:Alq₃ /Alq₃/LiF/Al, they exhibit yellow (A) and orange (B) color. In particularly, the two devices can be turned on at 5.2 V (device A) and 5.9V (device B), and reached the maximum brightness of 15066 and 8593cd/m² at 21V, respectively. From the cyclic voltammetry and the onset absorption, the highest occupied molecule orbital (HOMO) and the lowest unoccupied molecule orbital (LUMO) energy levels can be estimated as A (5.3, 2.9eV) and B (5.4, 3.1eV).

Citation Download Citation

Xiaochuan Li, Jiangshan Chen, Dongge Ma, Qiong Zhang, and He Tian "Bisindolylmaleimides derivatives for effective EL materials", Proc. SPIE 5632, Light-Emitting Diode Materials and Devices, (12 January 2005); https://doi.org/10.1117/12.600901

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