Back to results
US 2013/0075716 A1Published application
Organic electroluminescence element
AssigneeIdemitsu Losan Co., Ltd.
InventorsKazuki Nishimura, Hitoshi Kuma, Chishio Hosokawa, Hideaki Nagashima, Masaki Numata
Life of this patent
Estimating the term…
Abstract
An organic electroluminescence device (1) includes: an anode (3); a cathode (4); and an emitting layer (5) provided between the anode (3) and the cathode (4). The emitting layer contains a first host, a second host and a phosphorescent dopant. A triplet energy of each of the first host and the second host is 2.8 eV or more. An ionization potential of the first host is 5.5 eV or less. An affinity Af1 of the first host is smaller than an affinity Af2 of the second host.
Claims8
An organic electroluminescence device, comprising:
- an anode;
- a cathode;
- and
- an emitting layer provided between the anode and the cathode,
- wherein:
- the emitting layer comprises a first host, a second host and a phosphorescent dopant;
- a triplet energy of each of the first host and the second host is 2.8 eV or more;
- an ionization potential of the first host is 5.5 eV or less;
- and
- an affinity Af1 of the first host is smaller than an affinity Af2 of the second host.
7 more elements
Dependencies are inferred from the claim text.