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.
Claims22
1-10. (canceled)
A light-emitting device comprising:
- a substrate;
- a transistor formed over the substrate;
- an insulating film formed over the transistor;
- and
- a light-emitting element formed over the insulating film, electrically connected to the transistor, and comprising a first electrode, a second electrode, and a light-emitting layer interposed therebetween,
- wherein the light-emitting layer comprises a pyran derivative represented by the following general formula,
- and
- wherein R1 is an alkoxy group.
A light-emitting device comprising:
- a substrate;
- a transistor formed over the substrate;
- an insulating film formed over the transistor;
- and
- a light-emitting element formed over the insulating film, electrically connected to the transistor, and comprising a first electrode, a second electrode, and a light-emitting layer interposed therebetween,
- wherein the light-emitting layer comprises a pyran derivative represented by the following general formula,
- wherein R1 is an alkoxy group,
- wherein a temperature difference between a first temperature and a second temperature is within 100° C. when the Thermogravimetry-Differential Thermal Analysis is applied to the pyran derivative, and
- wherein the first temperature is a temperature at the beginning of a weight loss in the pyran derivative, and the second temperature is a temperature at which weight of the pyran derivative reaches 50% compared to the weight at the beginning of a weight loss.
A light-emitting device comprising:
- a substrate;
- a transistor formed over the substrate;
- an insulating film formed over the transistor;
- and
- a light-emitting element formed over the insulating film, electrically connected to the transistor, and comprising a first electrode, a second electrode, and a light-emitting layer interposed therebetween,
- wherein the light-emitting layer comprises a first substance having a dipole moment more than 4 debye, a second substance having a hole transportation property, and a pyran derivative represented by the following general formula,
- and
- wherein R1 is an alkoxy group.
A light-emitting device comprising:
- a substrate;
- a transistor formed over the substrate;
- an insulating film formed over the transistor;
- a light-emitting element formed over the insulating film, electrically connected to the transistor, and comprising a first electrode, a second electrode, and a light-emitting layer interposed therebetween;
- and
- a bank layer formed over the insulating film and covering an edge portion of the first electrode,
- wherein the light-emitting layer comprises a pyran derivative represented by the following general formula,
- and
- wherein R1 is an alkoxy group.
Dependencies are inferred from the claim text.