The Organic Light Emitting Diode (OLED) display technology is being developed extensively all over the world. OLED based electronic displays consume significantly less energy as compared to other display technologies such as Liquid Crystal Displays (LCDs). Currently, there are few known OLED materials, which emit in the blue region with high quantum yields and are thermally stable. We have recently synthesized and characterized a series of pyrenyl pyridines that are thermally stable blue emitters. The fluorescence spectrum of these compounds show emission in the range of 392-440 nm (in chloroform), which is predominantly the blue region of the electromagnetic spectrum. Further, TGA and DSC measurements indicate that our compounds are thermally stable with decomposition temperatures above 750 F. Our compounds also have high photo-stability and showed negligible photo-bleaching while under intense irradiation. The quantum yields of these compounds are in the range of 65-95% in chloroform. The cyclic voltammetry measurements when corroborated with the UV-Vis data, yield a HOMO-LUMO energy band gaps in the range of 3.1-3.4 eV, indicating that our materials are semi-conducting. These results suggest that our compound, when employed in a device, has the potential to generate stable blue OLEDs.<br/>

Photo-physical properties of selected pyrenyl pyridines: Potential candidates for blue OLEDs

254th National Meeting (2017)

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