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AssigneesKyushu University, National University Corporation, Kyulux, Inc.
InventorsHajime NAKANOTANI, Chihaya ADACHI, Hiroki NODA, Yoshitake SUZUKI, Naoto NOTSUKA, Hiroko NOMURA, Ayataka ENDO, Ping Kuen Daniel TSANG
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An organic electroluminescent device having an anode, a cathode, and a light-emitting layer between the anode and the cathode, wherein the light-emitting layer contains at least a first organic compound, a second organic compound and a third organic compound satisfying the following formula (A), the second organic compound is a delayed fluorescent material, and the third organic compound is a light-emitting material, has a high light emission efficiency. Formula (A): ES1(A)>ES1(B)>ES1(C) wherein ES1(A), ES1(B) and ES1(C) each represent a lowest excited singlet energy level of the first organic compound, the second organic compound and the third organic compound, respectively.
An organic electroluminescent device having an anode, a cathode, and at least one organic layer that contains a light-emitting layer between the anode and the cathode, wherein:
A compound represented by the following general formula (13):
Dependencies are inferred from the claim text.