公开(公告)号：US20190319210A1

公开(公告)日：2019-10-17

申请号：US16344541

申请日：2017-11-22

Applicant: Konica Minolta, Inc.

Inventor： Yuta NAKAMURA ,  Satoru INOUE ,  Taketo NAMIKAWA ,  Yasuo MIYATA ,  Kenichi TABATA ,  Hiromoto II

IPC: H01L51/50 ,  C09K11/06 ,  H01L51/00

Abstract: The present invention addresses the problem of providing: an organic electroluminescent element which is capable of emitting light with high luminous efficiency, while having a long service life; and a composition for organic materials. An organic electroluminescent element according to the present invention comprises a positive electrode, a negative electrode and one or more organic functional layers arranged between the positive electrode and the negative electrode, and is characterized in that: the organic functional layers contain a phosphorescent metal complex and a fluorescent compound; the phosphorescent metal complex is a compound having a structure that is represented by a specific general formula; and the phosphorescent metal complex is a core-shell type dopant that satisfies a specific formula.

公开(公告)号：US20190157599A1

公开(公告)日：2019-05-23

申请号：US16068808

申请日：2016-11-22

Applicant: KONICA MINOLTA, INC.

Inventor： Yuta NAKAMURA ,  Satoru INOUE ,  Masato NISHIZEKI

IPC: H01L51/50 ,  C09K11/06 ,  C07F15/00

Abstract: The objective of the invention is to provide a thin film having a long light-emitting life span, and an organic electroluminescence element. The above problem is solved by the thin film containing a light-emitting metallic complex and a host, the light-emitting metallic complex being represented by general formula (1) and satisfying formula (1), and the host being: a nonmetallic organic compound demonstrating phosphorescent light-emission at room temperature; a compound demonstrating heat activated-type delayed fluorescence; or a compound exhibiting an inverse intersystem crossing phenomenon between a singlet excitation state demonstrating a level higher than the lowest singlet excitation state, and a triplet excitation state demonstrating a level higher than the lowest triplet excitation state.

公开(公告)号：US20190280236A1

公开(公告)日：2019-09-12

申请号：US16347476

申请日：2017-11-22

Applicant: Konica Minolta, Inc.

Inventor： Kenichi TABATA ,  Yuta NAKAMURA ,  Taketo NAMIKAWA ,  Satoru INOUE ,  Yasuo MIYATA ,  Hiromoto II

IPC: H01L51/50 ,  H01L51/00 ,  H01L51/56 ,  H01L51/52

Abstract: A luminescent film includes a host compound, a blue phosphorescent compound, and a blue fluorescent compound, in which an emission spectrum of the blue phosphorescent compound and an absorption spectrum of the blue fluorescent compound have portions overlapping with each other; shortest wavelength-side maximum emission wavelengths of the blue phosphorescent compound (abbreviated as “BPM” in the expression) and the blue fluorescent compound (abbreviated as “BFM” in the expression) satisfy the following expression (1): λBFM≥λBPM: expression (1) in which λBFM represents the shortest wavelength-side maximum emission wavelength of the blue fluorescent compound and λBPM represents the shortest wavelength-side maximum emission wavelength of the blue phosphorescent compound; and light emission derived from the blue fluorescent compound is detected.

公开(公告)号：US20200006687A1

公开(公告)日：2020-01-02

申请号：US16483119

申请日：2018-02-21

Applicant: Konica Minolta, Inc.

Inventor： Satoru INOUE ,  Taketo NAMIKAWA ,  Kenichi TABATA ,  Yuta NAKAMURA

IPC: H01L51/50

Abstract: An organic electroluminescent element including a light emitting layer containing a first host compound, a second host compound, and a phosphorescent metal complex disposed between a cathode and an anode, wherein the first and the second host compounds satisfy the requirements that: in comparison of emission bands of maximum emission intensity in fluorescence emission spectra of single films of the first host compound alone, the second host compound alone, and a mixture of the first and the second host compounds, a difference between a wavelength of a fluorescence emission end located on a longer wavelength side among fluorescence emission ends of the first host compound and the second host compound, and a wavelength of a fluorescence emission end of the mixture is −3 to 3 nm; and a LUMO energy level and a HOMO energy level of the first host compound and the second host compound satisfy specific relationships.