Organic electroluminescent device and manufacturing method thereof

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United States of America Patent

PATENT NO 11437582
APP PUB NO 20180175294A1
SERIAL NO

15737179

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Abstract

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Disclosed is an organic electroluminescent device, comprising a substrate and light emitting units formed in sequence on the substrate, characterized in that, each of the light emitting units comprises a first electrode layer (1), a light emitting layer (2) and a second electrode layer (3), the light emitting layer comprises a host material and a dye, the host material is made of materials having both electron transport capability and hole transport capability; at least one material in the host material has a CT excited triplet state energy level T1 greater than its n-π excited triplet state energy level S1, and T1-S1≤0.3 eV; or, at least one material in the host material has a CT excited triplet state energy level T1 greater than its n-π excited triplet state energy level S1, and T1-S1≥1 eV, with the difference between its n-π excited second triplet state energy level and its CT excited first singlet state energy level being in the range of −0.1 eV to 0.1 eV. The organic electroluminescent device configuration can sufficiently utilize the triplet state energy in the host material and the dye to increase the luminous efficiency and prolong the service life of the device.

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Patent Owner(s)

Patent OwnerAddress
TSINGHUA UNIVERSITYBEIJING 100084
KUNSHAN GO-VISIONOX OPTO-ELECTRONICS CO LTDKUNSHAN JIANGSU 215300

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Duan, Lian Beijing, CN 67 340
Liu, Song Beijing, CN 222 1460
Xie, Jing Hebei, CN 92 1177
Zhang, Dongdong Beijing, CN 73 156
Zhao, Fei Beijing, CN 117 596

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