Pyran derivative
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsSachiko Yamagata, Hiroko Abe, Nobuharu Ohsawa, Ryoji Nomura, Satoshi Seo
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Abstract
A light-emitting compound that can be easily applied to vacuum vapor deposition and exhibit long wavelength light is disclosed. Further, a light-emitting element without inferior luminescence properties due to the carbonization of a light-emitting compound during vapor deposition; and a light-emitting device that is composed of the light-emitting elements are also disclosed. A pyran derivative is represented by the following general formula 1: wherein R1 is a hydrogen element or an alkoxy group.
Claims10
A pyran derivative represented by a following general formula:
- wherein R1 is selected from one of a hydrogen element and an alkoxy group.
A pyran derivative, wherein a weight of the pyran derivative reaches 50% or less compared to a weight at a beginning of a weight loss with a temperature difference of 100° C. or less when a temperature around the pyran derivative is increased gradually.
A light-emitting device comprising a light emitting element comprising a layer comprising a pyran derivative between a pair of electrodes,
- wherein the pyran derivative is represented by a following general formula:
- wherein R1 is selected from one of a hydrogen element and an alkoxy group.
A light-emitting device comprising a light emitting element comprising a layer comprising:
- a pyran derivative;
- a substance having a dipole moment more than 4 debye;
- and
- a substance having a hole transportation properties,
- wherein the pyran derivative is represented by a following general formula:
- wherein R1 is selected from one of a hydrogen element and an alkoxy group.
Dependencies are inferred from the claim text.