Organic electroluminescent devices and preparation methods thereof

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12262636
APP PUB NO 20200083460A1
SERIAL NO

16680518

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Abstract

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The present disclosure discloses an organic electroluminescent device and a preparation method thereof. The device includes a light-emitting layer, the light-emitting layer includes a host material, an auxiliary host material and a fluorescent dye; the host material is an exciplex prepared by mixing an electron donor material and an electron acceptor material, the auxiliary host material is a thermally activated delayed fluorescence material, a singlet energy level and a triplet energy level of the exciplex are higher than the single energy level and triplet energy level of the auxiliary host material. The above organic electroluminescent device can promote the reverse intersystem crossing of the host material and the auxiliary host material from the triplet excitons to the singlet excitons, enhance the Foster energy transfer, reduce the triplet exciton quenching, therefore the efficiency roll-off of the device is small and the external quantum efficiency is high.

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Patent Owner(s)

Patent OwnerAddress
TSINGHUA UNIVERSITYBEIJING
KUNSHAN GO-VISIONOX OPTO-ELECTRONICS CO LTD215000 BUILDING 4 NO 1 LONGTENG ROAD KUNSHAN DEVELOPMENT ZONE SUZHOU CITY JIANGSU PROVINCE SUZHOU CITY JIANGSU PROVINCE 215000

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Duan, Lian Kunshan, CN 67 340
Song, Xiaozeng Kunshan, CN 9 50
Wei, Jinbei Kunshan, CN 7 42
Zhang, Dongdong Kunshan, CN 73 156

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