Organic electroluminescent element
First Claim
1. An organic electroluminescent element comprising at least one organic compound layer between a pair of electrodes, wherein the at least one organic compound layer includes at least one luminescent layer, the luminescent layer comprises at least one luminescent dopant and plural host compounds, and the main peak in an emission spectrum of a single-layer film comprising only the plural host compounds prepared under the same film-forming conditions under which the luminescent layer is prepared has a wavelength that is at least 15 nm longer than the main peak wavelength of an emission spectrum of each of the plural host compounds.
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Abstract
An organic electroluminescent element having at least one organic compound layer between a pair of electrodes. The at least one organic compound layer includes at least one luminescent layer, and the luminescent layer comprises at least one luminescent dopant and plural host compounds. The main peak in the emission spectrum of a single-layer film comprising only the plural host compounds prepared under the same film-forming conditions under which the luminescent layer is prepared has a wavelength that is at least 15 nm longer than the main peak wavelength of the emission spectrum of each of the plural host compounds.
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Citations
15 Claims
- 1. An organic electroluminescent element comprising at least one organic compound layer between a pair of electrodes, wherein the at least one organic compound layer includes at least one luminescent layer, the luminescent layer comprises at least one luminescent dopant and plural host compounds, and the main peak in an emission spectrum of a single-layer film comprising only the plural host compounds prepared under the same film-forming conditions under which the luminescent layer is prepared has a wavelength that is at least 15 nm longer than the main peak wavelength of an emission spectrum of each of the plural host compounds.
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15. A method of producing an organic electroluminescent element, the method comprising forming at least one luminescent layer between a pair of electrodes by a vapor deposition method in which at least one luminescent dopant and a mixture of plural host compounds are used as deposition sources, wherein the main peak in an emission spectrum of a single-layer film comprising only the plural host compounds prepared under the same film-forming conditions under which the luminescent layer is prepared has a wavelength that is at least 15 nm longer than the main peak wavelength of an emission spectrum of each of the plural host compounds.
Specification