A Color Stable Blue Light-Emitting Device Using a Pyrazolo[3,4-b]Quinoline Derivative as an Emitter

Autor:	Xiping Jing, Linping Mu, Andrzej Danel, Guanbao Hui, Jing Wang, Zhiqun He, Yongsheng Wang, Ewa Kulig
Rok vydání:	2008
Předmět:	Brightness Photoluminescence Materials science Dopant business.industry Electroluminescence Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials OLED Optoelectronics Electrical and Electronic Engineering business Colorimetry HOMO/LUMO Common emitter
Zdroj:	IEEE Photonics Technology Letters. 20:1781-1783
ISSN:	1941-0174 1041-1135
DOI:	10.1109/lpt.2008.2004682
Popis:	A color stable and pure blue multilayered light-emitting device is obtained via suppressing voltage-dependent color change. Photophysical properties of a blue fluorescent organic compound 1-phenyl-3,4-dimethyl-1H-pyrazolo[3,4-b]-quinoline (PAQ5) are investigated; its highest occupied and lowest unoccupied molecular orbital levels are also measured. A multilayer electroluminescent device is fabricated using PAQ5 as an emitter dopant in a polymer matrix. The dopant has several functions in balancing injection and transport as well as bright blue light emission. The multilayered device using PAQ5 dopant substantially reduces voltage-dependent color changes, enhances the brightness of the device, and stabilizes general performance of the device. A color stable and pure blue electroluminescence with Commission Internationale de L'Eclairage (CIE) color coordinates of (x,y)=(0.168,0.100) is achieved.
Databáze:	OpenAIRE
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