Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.

Shijiahuang Chengzhi Yonghua Display Material Co., Ltd.

Zhe Shao

Guoliang Yun

Xing Zhang

Tianyu Wei

Songyuan Liu

Jianming Cheng

Zhian Liang

Sumin Kang

Mingxia Wang

Ke-Lun Shu

Shibo Wang

Shiwen Yue

Limei Zhang

Pengjun Bu

Jianhua Cao

Guofang Wang

Huifang Wang

Jian Zhang

Dongmei Wang

Yan Sui

Yujing Di

Weizhuang He

Zaifeng Xie

Jiacheng Zhang

Minhui Jia

The present invention discloses a blue luminescent compound, a blue luminescent composition, and an organic electroluminescent device, display device and lighting device comprising the blue luminescent compound or blue luminescent composition. The blue luminescent compound is selected from one of the following structures. The blue luminescent compound provided by the present invention is used as a host material in a blue luminescent layer. A triplet-triplet fusion process (TTF effect) of the material is improved by using an α-naphthalene substituent. The theoretical exciton utilization rate of the material is increased to 62.5%. The electron transmission rate of the material is improved by introducing an oxygen atom with a large electronegativity, thereby improving the carrier balance. Furthermore, by deuteration of at least part of naphthyl and an anthracene nucleus and combination with semi-deuterated dibenzofuran, the thermal stability of the material is significantly enhanced and at the same time an exciton energy rise caused by vibration in the material is reduced, thereby weakening the problems of damage and deterioration of a material in an adjacent layer by excitons, so that the lifetime of the organic electroluminescent device can be significantly improved, and defects in the prior art are overcome.

Blue luminescent compound, blue luminescent composition, and organic electroluminescent device, display device and lighting device comprising same

The present invention discloses a heteroatom- and cycloalkyl-containing organic compound and an organic electroluminescent device containing the compound. The general structural formula of the organic compound is as represented by Formula I. The organic compound has a boron-nitrogen structure with multiple resonance effect, wherein a cycloalkyl-containing fluorenyl structure is introduced on the basis of the boron-nitrogen structure. The molecular size is greatly expanded by means of the cycloalkyl group, thereby effectively avoiding a concentration quenching effect, while the molecular orientation is enhanced due to the planarity of the fluorenyl group. In order to further improve the efficiency, a heteroatom is introduced to improve the spin coupling effect, and the oscillator strength is enhanced to improve the energy transfer between a host and a guest; furthermore, by means of the heavy atom effect, the conjugation of a luminous moiety is extended while the efficiency is further improved, avoiding excessive photochromic blue shift, so that the organic compound of the present invention has a good efficiency and lifetime performance. Therefore, an organic electroluminescent device manufactured by using the organic compound of the present invention has a good performance in terms of external quantum efficiency and lifetime.

Heteroatom- and cycloalkyl-containing organic compound and organic electroluminescent device containing compound

The present invention relates to an organic electroluminescent material, an organic electroluminescent device, and a method for preparing the organic electroluminescent device. Due to comprising an organic compound A with 3.0 eV&#x3e;ET&#x2265;2.0 eV and a compound B of M(LA)x(LB)y(LC)z, the organic electroluminescent material of the present invention has the advantages of an increased luminescence lifetime and/or a reduced operating voltage on the basis of maintaining other electronic properties at a certain level.

Metal complex organic electroluminescent material and organic electroluminescent device

Disclosed is a liquid crystal composition comprising one or more compounds represented by formula I, one or more compounds represented by formula II, and one or more compounds represented by formula III: The liquid crystal composition has simultaneously a lower rotary viscosity, a better photoelectric performance, a higher clearing point, a good low temperature performance, and less display defects. Further disclosed is a liquid crystal display element or device comprising the liquid crystal composition.

Liquid crystal composition

The present invention discloses a negative dielectric anisotropic liquid crystal composition, characterized in that the liquid crystal composition comprises one or more compounds represented by formula I, one or more compounds represented by formula II, one or more compounds represented by formula III and one or more compounds represented by formula IV, In the liquid crystal molecules of the composition, the van der Waals force therebetween is used as a motive force, such that the liquid crystal molecules generate an attractive force at an appropriate distance and positional relationships, thereby enabling the liquid crystal molecules to have excellent regular alignment characteristics, which is favorable for the liquid crystal molecules to modulate the transmission and blocking of light in the liquid crystal display device.

Liquid crystal composition and liquid crystal display element or display thereof

Provided is a liquid crystal compound represented by formula I, the compound having a positive dielectric anisotropy, a great elastic constant and a good solubility. Further provided is a liquid crystal composition comprising the liquid crystal compound represented by formula I, the liquid crystal composition having a good stability against light and heat, a lower viscosity, a wider refractive index that may be achieved by the adjustment of the monomer ratio, and a higher clearing point (a very wide service temperature range), and in particular, the liquid crystal composition has a higher light transmittance, thus allowing a display device to have a higher brightness or an energy saving effect.

Liquid crystal compound and liquid crystal composition

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Hebei, China

Zhe Shao