Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHideko Inoue, Yui Yamada, Nobuharu Oshawa, Satoshi Seo
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Abstract
An organometallic complex which can be provided at low cost and which emits blue phosphorescence is provided. An organometallic complex in which nitrogen at the 1-position of a 5-aryl-4H-1,2,4-triazole derivative is coordinated to a Group 9 metal or a Group 10 metal, the aryl group is bonded to the Group 9 metal or the Group 10 metal, and the 5-aryl-4H-1,2,4-triazole derivative is a 3-aryl-5,6,7,8-tetrahydro-4H-[1,2,4]triazolo[4,3-a]pyridine derivative is provided. The organometallic complex emits green to blue phosphorescence and is also advantageous in terms of cost.
Claims20
A light-emitting element comprising a layer containing an organic compound between a pair of electrodes,
- wherein the light-emitting element exhibits blue-green to blue light emission,
- wherein the layer containing the organic compound contains iridium, and
- wherein when the layer containing the organic compound is analyzed by ToF-SIMS using Bi3++ as a primary ion with an irradiation amount of the primary ion of 1.0×1012 ions/cm3 or less, signals appear around m/z=41 and m/z=55, at least at a depth of the layer containing the organic compound.
A light-emitting element comprising a layer containing an organic compound between a pair of electrodes,
- wherein the light-emitting element exhibits blue-green to blue light emission,
- wherein the layer containing the organic compound contains iridium, and
- wherein when the layer containing the organic compound is analyzed by ToF-SIMS using Bi3++ as a primary ion with an irradiation amount of the primary ion of 1.0×1012 ions/cm3 or less, signals appear around m/z=41, m/z=55, m/z=104, and m/z=200, at least at a depth of the layer containing the organic compound.
A light-emitting element comprising a layer containing an organic compound between a pair of electrodes,
- wherein the light-emitting element exhibits blue light emission,
- wherein the layer containing the organic compound contains iridium, and
- wherein when the layer containing the organic compound is analyzed by ToF-SIMS using Bi3++ as a primary ion with an irradiation amount of the primary ion of 1.0×1012 ions/cm3 or less, a signal appears around m/z=589, at least at a depth of the layer containing the organic compound.
Dependencies are inferred from the claim text.