LIGHT-EMITTING DEVICE

Abstract: a highly reliable light-emitting device is provided. the light-emitting device includes a first electrode, a second electrode, and a light-emitting layer. the light-emitting layer is positioned between the first electrode and the second electrode. the light-emitting layer includes a first organic compound, a second organic compound, and a substance that can convert triplet excitation energy into light emission. the first organic compound includes a �-electron deficient heteroaromatic ring. the second organic compound includes a �-electron rich heteroaromatic ring or an aromatic amine skeleton. the first organic compound and the second organic compound each contain deuterium. a difference between the lowest triplet excitation level of the first organic compound and that of the second organic compound is less than or equal to 0.10 ev.

Inventor(s): Satoshi SEO, Nobuharu OHSAWA, Hiromitsu KIDO, Yui YOSHIYASU, Satoko NUMATA, Eriko AOYAMA, Anna TADA

CPC Classification: H10K85/40 (ORGANIC ELECTRIC SOLID-STATE DEVICES)

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