Wuhan Tianma Micro-electronics Co., Ltd

Kui Wang

Tiansheng Ye

Xin Ke

Kun Wang

You Gao

Longxin Pan

Kaibo Zhang

Provided are an organic compound, an electroluminescent material, and a use thereof. The organic compound has a structure represented by Formula I and is a carbazole olefin-like compound which is beneficial for improving the amorphous performance, thermal stability, and glass transition temperature of the material. The organic compound has appropriate HOMO energy level and LUMO energy level and a relatively high triplet energy level and can inhabit the transfer of triplet energy from a guest back to a host and reduce a driving voltage of a device. The organic compound, as a host material, has a relatively high carrier transport rate and balanced carrier transport performance, so as to facilitate the balance of hole and electron currents in the device, obtain a wider carrier recombination region, significantly improve light emitting efficiency and external quantum efficiency of the device, and reduce a turn-on voltage and power consumption of the device.

Organic compound, electroluminescent material, and use thereof

The present disclosure provides a thermally activated delayed fluorescent material and application thereof, the thermally activated delayed fluorescent material is a compound having a structure represented by Formula I and can be used as a light-emitting layer material of an organic electroluminescent device. The thermally activated delayed fluorescent material is applied to an organic electroluminescent device comprising an anode, a cathode, and at least one organic thin film layer between the anode and the cathode, the light-emitting layer in the organic thin film layer comprises any one or a combination of at least two of the thermally activated delayed fluorescent materials. An energy level difference between the triplet state and the singlet state of the thermally activated delayed fluorescent material provided by the present disclosure can be reduced to below 0.25 eV, and when used as a light-emitting layer material in an organic electroluminescent device, it can improve carrier balance, increase luminous efficiency, and reduce the device's voltage.

Thermally activated delayed fluorescent material and application thereof

Provided are an electroluminescent compound having a structure represented by Formula I, a thermally activated delayed fluorescence material and an application thereof. The electroluminescent compound has TADF characteristics and may be applied to a light emitting layer of an OLED device as a thermally activated delayed fluorescence material. The OLED device includes an anode, a cathode, and at least one organic thin film layer comprising the thermally activated delayed fluorescence material in a light emitting layer between the anode and the cathode. The electroluminescent compound effectively reduces the overlap between HOMO and LUMO through special molecular structure design, so that &#x394;Eis reduced to less than 0.25 eV, which satisfies reverse crossing of energy from a triplet state to a singlet state, effectively improves transmission capacities of two kinds of carriers, improves carrier balance, and thus significantly improves light emitting efficiency of the OLED device.

Electroluminescent compound, thermally activated delayed fluorescence material, and application thereof

The present disclosure provides a boron heterocyclic compound having a structure represented by a chemical formula 1, wherein Land Lare each independently selected from the group consisting of C6-C30 aryl, C6-C30 fused aryl, C4-C30 heteroaryl, and C4-C30 fused heteroaryl; and Rand Rare each independently selected from the group consisting of carbazolyl, a carbazolyl-derived group, acridinyl, an acridinyl-derived group, diarylamino, and a diarylamino-derived group. The double boron heterocyclic structure functions as an electron acceptor and a linker. In the present disclosure, by attaching a group having a large steric hindrance to the boron atom of the boron heterocyclic ring, the molecules the compound are prevented from aggregating, and thus a &#x3c0;-aggregation or excimer formed by direct accumulation of the conjugate plane is avoided, thereby improving the light-emitting efficiency. The present disclosure further provides a display panel and a display apparatus. 

Compound, display panel, and display apparatus

The present disclosure provides a boron-heterocyclic compound having a structure represented by Chemical Formula 1, in which Land Lare each independently selected from a single bond, C6-C30 aryl, C6-C30 fused aryl, C4-C30 heteroaryl, or C4-C30 fused heteroaryl; and Rand Rare each independently selected from carbazolyl and derivative groups thereof, acridinyl and derivative groups thereof, and diarylamino and derivative groups thereof. In an embodiment, the boron-heterocyclic structure is suitable for use not only as an electron acceptor group but also as a linking group. By linking a group having a large steric hindrance to the boron atom of the boron-heterocyclic ring, the compound molecules are prevented or limited from aggregating, and thus a &#x3c0;-aggregation or excimer formed by direct accumulation of conjugate planes is avoided or reduced, thereby improving luminous efficiency. The present disclosure further provides a display panel and a display apparatus containing the compound. 

The present disclosure relates to the field of OLED technologies and provides a compound having TADF property. In an embodiment, the compound has a structure represented by Formula (1), in which Land Lare each a hydrogen atom, phenyl, naphthyl, anthracyl, pyridyl, pyrimidinyl, and pyrazinyl; Rand Rare each aryl or and heteroaryl, such as a carbazole-derived group, an acridine-derived group, diarylamino, a diarylamine-derived group, and the like. In the present disclosure, the double boron heterocyclic structure functions not only as an electron acceptor but also as a linker. In the compound according to the present disclosure, by attaching a group having a large steric hindrance to the boron atom of the boron heterocyclic ring, the molecules the compound are prevented from aggregating, and thus a &#x3c0;-aggregation or excimer formed by direct accumulation of the conjugate plane is avoided, thereby improving the light-emitting efficiency. 

A compound, having a structure represented by Formula (I), 

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Wuhan, China

Kui Wang