| 摘要 |
<p>PURPOSE: A light emitting element, a light emitting device thereof, a display device thereof, and an electronic device thereof are provided to improve the blowdown efficiency of light by placing a phosphorescence emitting layer between the positive pole and an intermediate layer and placing a fluorescence emitting layer between the negative pole and the intermediate layer. CONSTITUTION: The positive pole(3) and negative pole(7) are provided. A phosphorescence emitting layer(43) is formed between the positive and negative poles and emits phosphorescence by applying a current between the positive and negative poles. A fluorescence emitting layer(61) emits fluorescence. An intermediate layer is formed between the phosphorescence emitting layer and the fluorescence emitting layer. The intermediate layer includes a hole transport layer(52) and an electron transport layer contacting each other. The electron transport layer is placed at a positive pole side and the hole transport layer is placed at a negative pole side. [Reference numerals] (AA) Light</p> |
