25 November 2009 White organic light-emitting diodes based on fluorescent dyes 7-diethylamino-3-(2-thienyl)chronmen-2-ylidene]-2,2-dicyanoviny-lamine
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Proceedings Volume 7509, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration; 750913 (2009); doi: 10.1117/12.838092
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China
Abstract
White organic light-emitting diodes (OLEDs) were fabricated with red fluorescent dye [7-diethylamino-3-(2- thienyl)chronmen-2-ylidene]-2,2-dicyanoviny-lamine (ACY) by spin coating method, which used a mixture of poly(N-vinylcarbazole) (PVK) and ACY with various weight ratios. The spectra characteristics of different devices were studied and device performance was analyzed. The results demonstrated that optimum device performance could be obtained by choosing a concentration proportion of PVK : ACY at 1000 : 7. In EL spectra of this white OLED (WOLED) at 9 V, the red and green light emission from ACY and Alq3 were all observed. It was found that the ACY is a kind of material of energy transfer. The red fluorescence was emitted from ACY dopant, but energy was transferred from host material PVK. Also, weak concentration quenching was observed in the EL spectra of OLEDs.
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L. Li, J. S. Yu, S. J. Yu, Y. D. Jiang, "White organic light-emitting diodes based on fluorescent dyes 7-diethylamino-3-(2-thienyl)chronmen-2-ylidene]-2,2-dicyanoviny-lamine", Proc. SPIE 7509, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration, 750913 (25 November 2009); doi: 10.1117/12.838092; https://doi.org/10.1117/12.838092
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KEYWORDS
Organic light emitting diodes

Electroluminescence

Doping

Coating

Energy transfer

Luminescence

Molecules

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