公开(公告)号：US20220263030A1

公开(公告)日：2022-08-18

申请号：US17629289

申请日：2020-07-20

Applicant: IDEMITSU KOSAN CO.,LTD. ,  TORAY INDUSTRIES, INC.

Inventor： Hiromi NAKANO ,  Hisato MATSUMOTO ,  Takushi SHIOMI ,  Toshinari OGIWARA ,  Keiji OKINAKA ,  Kazunari KAWAMOTO ,  Takashi TOKUDA ,  Kazumasa NAGAO

IPC: H01L51/00 ,  C07D491/048 ,  C09K11/06 ,  C07D495/04 ,  C07F5/02

Abstract: An organic-EL device includes an emitting-layer, first-layer adjacent to the emitting-layer near the anode, and second-layer adjacent to the emitting-layer near the cathode. The emitting-layer contains first, second and third compounds. The first-layer contains a compound of formula-(A). The second-layer contains a compound of formula-(B). The first, second and third compounds are a fluorescent compound of formula-(1), delayed-fluorescent compound of formula-(2), and compound of formula-(3), respectively. Singlet energies S1 of the first to third compounds satisfy S1(M3)>S1(M2)>S1(M1). In the formula-(A), Ra1-Ra5 etc. each represent a substituent etc. In the formula-(B), X1-X3 each represent N atom etc, Ar1 and Ar2 each represent a group of formula-(1B) etc. A represents the group of the formula-(1B). In the formula-(1B), HAr is of formula-(2B), a is 1 to 5, and L1 is a linking group etc. In the formula-(2B), X11-X18 each represent N atom etc, and Y1 represent O, S, or N atom etc.

公开(公告)号：US20240215447A1

公开(公告)日：2024-06-27

申请号：US18546535

申请日：2022-02-16

Applicant: IDEMITSU KOSAN CO.,LTD. ,  TORAY INDUSTRIES, INC.

Inventor： Hiromi NAKANO ,  Hisato MATSUMOTO ,  Takushi SHIOMI ,  Toshinari OGIWARA ,  Keiichi YASUKAWA ,  Kazunari KAWAMOTO ,  Takashi TOKUDA ,  Kazumasa NAGAO

IPC: H10K85/60 ,  C09K11/06

CPC classification number: H10K85/658 ,  C09K11/06 ,  H10K85/657 ,  H10K85/6572 ,  H10K85/6574 ,  H10K50/12

Abstract: An organic electroluminescence device may include an emitting layer between an anode and a cathode, in which the emitting layer contains a first compound that fluoresces, a second compound that exhibits delayed fluorescence, and a third compound. The first compound may have formula (1):




the second compound may have formula (2):






the third compound may have formula (3):






, and

a singlet energy of the first compound S1(M1), a singlet energy of the second compound S1(M2), and a singlet energy of the third compound S1(M3) satisfy a Inequality






S1(M3)>S1(M2)>S1(M1)   (Eq. 1).