Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.

Zaihao Zheng

Pengjun Bu

Shiwen Yue

Tianyu Wei

Zhicheng Cao

Zenglin Zhang

Feng Liang

There is provided a long-lifetime organic electroluminescent compound and an organic electroluminescent device comprising the same. The general structural formula of the organic electroluminescent compound is as shown in Formula I. The organic electroluminescent compound contains a benzonaphthofuran moiety. By means of the benzonaphthofuran structure instead of dibenzofuran, the conjugated length of π electron cloud is prolonged. When the molecule is converted into an anionic state after accepting electrons, the negative charges can be effectively dispersed on the benzonaphthofuran moiety, avoiding excessively high local energy caused by uneven distribution of the negative charges, thus increasing the stability of a material. Furthermore, the benzonaphthofuran moiety has also been found to have a relatively good planarity, and the stability of the material can be significantly improved by means of partial deuteration. In the present invention, by means of deuteration at some sites on the benzonaphthofuran structure, the vibration of carbon-hydrogen bonds can be significantly reduced, the stability of the benzonaphthofuran can be enhanced, and the deuteration cost can be reduced.

Long-lifetime organic electroluminescent compound and organic electroluminescent device comprising the same

The present invention discloses a blue luminescent composition and an organic electroluminescent device comprising the blue luminescent composition. The blue luminescent composition comprises a host material with a general structural formula as represented by Formula I and a guest material with a general structural formula as represented by Formula II. In the present invention, a composition composed by rational combination of a compound containing a dibenzofuran group and deuterium-substituted anthracene as a host material and a compound containing a cycloalkyl group and a steric hindrance group such as thiophene as a guest material is capable of significantly enhancing the stability and lifetime of a blue-light organic electroluminescent device while enhancing the electron migration and transfer efficiency and eliminating a host luminescence phenomenon.

Blue luminescent composition and organic electroluminescent device comprising blue luminescent composition

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Hebei, China

Zaihao Zheng