An organic electroluminescence element having at least one organic layer including a light-emitting layer between a pair of electrodes, wherein the organic electroluminescence element has an electron transport layer containing a phosphine oxide compound and an electron transport layer that does not substantially contain the phosphine oxide compound between the light-emitting layer and a cathode, the electron transport layer containing the phosphine oxide compound is nearer to the cathode, and the electron transport layer that does not substantially contain the phosphine oxide compound is nearer to the light-emitting layer. An organic EL element that exhibits high light-emission efficiency and is excellent in drive durability is provided.
ORGANIC ELECTROLUMINESCENT DEVICE
申请人:FUKUNAGA Hirofumi
公开号:US20080241589A1
公开(公告)日:2008-10-02
An organic electroluminescent device is provided and includes: a pair of electrodes; and an organic compound layer between the pair of electrodes, the organic compound layer including a light-emitting layer. The at least one organic compound layer contains at least one of a compound represent by formula (I) and a compound represented by formula (II).
An Approach to Nonsymmetric Bis(tertiary phosphine oxides) Comprising Heterocyclic Fragments via the Pd-Catalyzed Phosphorylation
作者:Gladis G. Zakirova、Dmitrii Yu. Mladentsev、Nataliya N. Borisova
DOI:10.1055/s-0040-1706419
日期:2020.11
imidazole, and thiazole were synthesized in good yields via the successive introduction of phosphine oxide groups into the initial dihalogenated heterocycles by means of Pd-catalyzed phosphorylation reaction. The synthesis of pyridine-type compounds is hindered by competing double coupling, while for five-membered heterocycles the principal difficulty is the dehalogenation. Both side processes were successfully