Canon Kabushiki Kaisha

Hideki Tashiro

Kazunori Ueno

G K Surya Prakash

Xiao-Chang Charles Li

Yoshimasa Okamura

Masashi Tashiro

A pyrene based compound and its use in an organic light emitting device (OLED) according to the following formula:In the above formula, Zrepresents a hydrogen atom, deuterium atom, oxygen atom, silicon atom, selenium atom, substituted or unsubstituted aryl group, substituted or unsubstituted heteroaryl group, substituted or unsubstituted aryl amine or a combination thereof, and Zrepresents a hydrogen or deuterium atom. One of Yand Yrepresents a hydrogen atom, deuterium atom, oxygen atom, silicon atom, selenium atom, a substituted or unsubstituted aryl group, substituted or unsubstituted heteroaryl group, substituted or unsubstituted aryl amine or a combination thereof, and the other of Yand Yrepresents a hydrogen or deuterium atom. Xthrough Xindependently represent hydrogen atoms, deuterium atoms, alkyl groups or aryl groups, and at least one of Xthrough Xrepresents a bulky alkyl group or bulky aryl group. Also, at least one of Xthrough X, Y, Y, Z, and Zrepresents a deuterium atom. The pyrene based compounds of this invention are useful in emissive layers, hole transport layers, or electron transport layers of an organic light emitting device (OLED). Within these layers, the pyrene based compound can serve directly to constitute the layers or as a host and/or dopant.

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Hideki Tashiro