Back to results
US 9,082,995 B2Granted
Organic EL element and organic EL material-containing solution
AssigneeIdemitsu Kosan Co., Ltd.
InventorsKazuki Nishimura, Chishio Hosokawa, Toshihiro Iwakuma, Kenichi Fukuoka, Tetsuya Inoue
Life of this patent
Estimating the term…
Abstract
An organic EL device (1) includes an anode (3), a cathode (4) and an organic thin-film layer (5) provided between the anode (3) and the cathode (4). The organic thin-film layer (5) includes a single-layered mixed-color emitting layer (51) for providing mixed-color emission. The mixed-color emitting layer (51) contains a host, a fluorescent dopant for blue fluorescent emission and a phosphorescent dopant for red or green phosphorescent emission.
Claims11
An organic EL device, comprising:
- an anode;
- a cathode;
- and
- an organic thin-film layer provided between the anode and the cathode,
- the organic thin-film layer comprising a single-layered mixed-color emitting layer for providing mixed-color emission,
- the mixed-color emitting layer containing a host, a fluorescent dopant for fluorescent emission and a phosphorescent dopant for phosphorescent emission,
- wherein the wavelength of emission of the fluorescent dopant is shorter than the wavelength of emission of the phosphorescent dopant, wherein the singlet energy gap EgH of the host and the singlet energy gap EgPD of the phosphorescent dopant satisfy a relationship of EgH<EgPD.
4 more elements
An organic-EL-material-containing solution comprising:
- a host;
- a fluorescent dopant for fluorescent emission;
- a phosphorescent dopant for phosphorescent emission;
- and
- a solvent,
- wherein the host, the fluorescent dopant and the phosphorescent dopant are dissolved in the solvent,
- wherein the wavelength of emission of the fluorescent dopant is shorter than the wavelength of emission of the phosphorescent dopant, and
- wherein a single energy gap EgH of the host and a singlet energy gap EgPD of the phosphorescent dopant satisfy a relationship of EgH<EgPD.
5 more elements
An organic EL device, comprising:
- an anode;
- a cathode;
- and
- an organic thin-film layer provided between the anode and the cathode,
- the organic thin-film layer comprising a single-layered mixed-color emitting layer for providing mixed-color emission,
- the mixed-color emitting layer containing a first host, a fluorescent dopant for fluorescent emission and a first phosphorescent dopant for phosphorescent emission,
- wherein the wavelength of emission of the fluorescent dopant is shorter than the wavelength of emission of the first phosphorescent dopant,
- said organic thin-film layer comprises a second emitting layer layered on a side of said mixed-color emitting layer near said anode,
- said second emitting layer comprising a second host and a second phosphorescent dopant, and
- a triplet energy gap EgT(H1) of said first host and a triplet energy gap EgT(PD2) of said second phosphorescent dopant satisfy a relationship of EgT(H1)<EgT(PD2).
7 more elements
An organic EL device, comprising:
- an anode;
- a cathode;
- and
- an organic thin-film layer provided between the anode and the cathode,
- the organic thin-film layer comprising a single-layered mixed-color emitting layer for providing mixed-color emission,
- the mixed-color emitting layer comprising a first host, a fluorescent dopant for fluorescent emission and a first phosphorescent dopant for phosphorescent emission,
- wherein the wavelength of emission of the fluorescent dopant is shorter than the wavelength of emission of the first phosphorescent dopant,
- said organic thin-film layer comprises a second emitting layer layered on a side of said mixed-color emitting layer near said cathode,
- said second emitting layer comprising a second host and a second phosphorescent dopant, and
- a triplet energy gap EgT(H1) of said first host and a triplet energy gap EgT(PD2) of said second phosphorescent dopant satisfy a relationship of EgT(H1)<EgT(PD2).
7 more elements
An organic EL device, comprising:
- an anode;
- a cathode;
- and
- an organic thin-film layer provided between the anode and the cathode,
- the organic thin-film layer comprising a single-layered mixed-color emitting layer for providing mixed-color emission,
- the mixed-color emitting layer comprising a first host, a fluorescent dopant for fluorescent emission and a first phosphorescent dopant for phosphorescent emission,
- wherein the wavelength of emission of the fluorescent dopant is shorter than the wavelength of emission of the first phosphorescent dopant,
- said organic thin-film layer comprises a second emitting layer layered on a side of said mixed-color emitting layer near said anode,
- said second emitting layer comprising a second host and a second phosphorescent dopant, and
- a singlet energy gap Eg(H1) of said first host and a singlet energy gap Eg(PD2) of said second phosphorescent dopant satisfy a relationship of Eg(H1)<Eg(PD2).
7 more elements
An organic EL device, comprising:
- an anode;
- a cathode;
- and
- an organic thin-film layer provided between the anode and the cathode,
- the organic thin-film layer comprising a single-layered mixed-color emitting layer for providing mixed-color emission,
- the mixed-color emitting layer comprising a first host, a fluorescent dopant for fluorescent emission and a first phosphorescent dopant for phosphorescent emission,
- wherein the wavelength of emission of the fluorescent dopant is shorter than the wavelength of emission of the first phosphorescent dopant,
- said organic thin-film layer comprises a second emitting layer layered on a side of said mixed-color emitting layer near said cathode,
- said second emitting layer comprising a second host and a second phosphorescent dopant, and
- a singlet energy gap Eg(H1) of said first host and a singlet energy gap Eg(PD2) of said second phosphorescent dopant satisfy a relationship of Eg(H1)<Eg(PD2).
7 more elements
An organic EL device, comprising:
- an anode;
- a cathode;
- and
- an organic thin-film layer provided between the anode and the cathode,
- the organic thin-film layer comprising a single-layered mixed-color emitting layer for providing mixed-color emission,
- the mixed-color emitting layer comprising a first host, a fluorescent dopant for fluorescent emission and a first phosphorescent dopant for phosphorescent emission,
- wherein the wavelength of emission of the fluorescent dopant is shorter than the wavelength of emission of the first phosphorescent dopant,
- said organic thin-film layer comprises a second emitting layer layered on a side of said mixed-color emitting layer near said anode,
- said second emitting layer comprising a second host and a second phosphorescent dopant, and
- a triplet energy gap EgT(PD1) of said first phosphorescent dopant and a triplet energy gap EgT(PD2) of said second phosphorescent dopant satisfy a relationship of EgT(PD1)<EgT(PD2).
7 more elements
An organic EL device, comprising:
- an anode;
- a cathode;
- and
- an organic thin-film layer provided between the anode and the cathode,
- the organic thin-film layer comprising a single-layered mixed-color emitting layer for providing mixed-color emission,
- the mixed-color emitting layer comprising a first host, a fluorescent dopant for fluorescent emission and a first phosphorescent dopant for phosphorescent emission,
- wherein the wavelength of emission of the fluorescent dopant is shorter than the wavelength of emission of the first phosphorescent dopant,
- said organic thin-film layer comprises a second emitting layer layered on a side of said mixed-color emitting layer near said cathode,
- said second emitting layer comprising a second host and a second phosphorescent dopant, and
- a triplet energy gap EgT(PD1) of said first phosphorescent dopant and a triplet energy gap EgT(PD2) of said second phosphorescent dopant satisfy a relationship of EgT(PD1)<EgT(PD2).
7 more elements
Dependencies are inferred from the claim text.