A novel class of blue-emitting molecules based on a core of benzotriimidazole have been designed and synthesized for organic electroluminescent device (OLED) display applications.  The novel benzotriimidazole molecules exhibit photoluminescence with ?max between 400 nm and 450 nm, and impressive quantum yields as high as 77%. These properties are highly desirable for blue emitting materials in OLED display applications. The photoluminescent spectrum and efficiency of the benzotriimidazole molecules can be tuned by varying functional groups on pendants to the benzotriimidazole core.  These observations present a significant approach in developing much needed new blue emitters for OLED research. Theoretical studies were done to garner additional insight into the relationship between the structure of benzotriimidazole-based molecules and their photoluminescence properties.The utility of the synthesized benzotriimidazoles was tested via the fabrication of OLED devices. The results of device testing indicate that this class of benzotriimidazole material is significant not only as a blue emitter for OLEDs, but also as an electron injection and electron transport material for organic electronic devices.  US patent applications are currently in progress.

Synthesis of a class of efficient blue photoluminescent molecules based on a benzotriimidazole core

248th National Meeting (2014)

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