Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHarue Osaka, Satoko Shitagaki, Nobuharu Ohsawa
Life of this patent
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Abstract
To provide a light-emitting element with high emission efficiency. In a light-emitting element including an organic compound between a pair of electrodes, the molecular weight X of the organic compound is 450 or more and 1500 or less, and the absorption edge of the organic compound is at 380 nm or more. By liquid chromatography mass spectrometry in a positive mode in which an argon gas is made to collide with the organic compound subjected to separation using a liquid chromatograph at any energy higher than or equal to 1 eV and lower than or equal to 30 eV, a product ion is detected at least around m/z=(X−240).
Claims13
(canceled)
A light-emitting device comprising:
- an electrode;
- a layer including an organic compound adjacent to the electrode;
- and
- a light-emitting layer,
- wherein:
- the organic compound is represented by a formula (G1)
- R1 represents hydrogen, an alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted phenyl group,
- R2 to R6 separately represent hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, or a substituted or unsubstituted phenanthryl group,
- Ar1 represents hydrogen, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, or a substituted or unsubstituted phenanthryl group,
- Ar2 represents a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, or a substituted or unsubstituted phenanthryl group,
- a molecular weight X of the organic compound is greater than or equal to 450 and less than or equal to 1500,
- an absorption edge of the organic compound is at 380 nm or more, and
- a product ion is detected at least around m/z=(X−240) by mass spectrometry.
A light-emitting device comprising:
- an electrode;
- a layer including an organic compound adjacent to the electrode;
- and
- a light-emitting layer,
- wherein:
- the organic compound comprises a phenylcarbazole skeleton and an N-biphenyl-N-phenylamine skeleton,
- the N-biphenyl-N-phenylamine skeleton is bonded to a 3-position of the phenylcarbazole skeleton,
- a molecular weight X of the organic compound is greater than or equal to 450 and less than or equal to 1500,
- an absorption edge of the organic compound is at 380 nm or more, and
- a product ion is detected at least around m/z=(X−240) by mass spectrometry.
Dependencies are inferred from the claim text.