Abstract: The present invention provides a nitrogen-containing fused heterocyclic compound and applications thereof. When the nitrogen-containing fused heterocyclic compound of the present invention is used as a host material of an emitting layer of an organic light-emitting element, the organic light-emitting element has a lower driving voltage (3.8 V to 4.1 V), a higher current efficiency (15 Cd/A to 23 Cd/A or higher) and a longer service life (273 h or higher).

Abstract: A benzonaphthofuran-containing oxazole organic compound has a structure as shown in formula (I): An organic light-emitting device containing the benzonaphthofuran-containing oxazole organic compound can have relatively low driving voltage, relatively high light-emitting efficiency and relatively long service life.

Abstract: The present application relates to the field of display technology, and in particular to an organic material composition and use thereof. This organic material composition comprises a first compound and a second compound. The first compound and the second compound have the following structures: the first compound having a structure as shown in Formula (1) and the second compound having a structure as shown in Formula (2) cooperate with each other, which is beneficial for matching HOMO and LUMO energy levels with adjacent energy levels, so that the organic material composition obtains higher stability and more balanced carrier mobility, thereby making the organic electroluminescent device containing the material have a better lifespan, and also has a lower driving voltage and higher efficiency.

Abstract: The present disclosure discloses an organic electroluminescent compound, a composition, a light emitting device and an application. The organic electroluminescent compound is a compound M having a structure shown in Formula (2), and Formula (2) is: in Formula (2), X1-X14 are selected from N or CR8, and R8 is selected from hydrogen or deuterium; L is selected from a connecting bond, substituted or unsubstituted C6-C30 arylenyl, and substituted or unsubstituted C3-C30 heteroarylenyl; Ar8-Ar9 are each independently selected from substituted or unsubstituted C6-C30 aryl and substituted or unsubstituted C3-C30 heteroaryl; and substituents are selected from one of or a combination of two of deuterium, halogen, cyano, C1-C6 alkyl, C3-C30 cycloalkyl, C6-C30 aryl and C3-C30 heteroaryl.

Abstract: The present application relates to the technical field of display, in particular to an organic electroluminescent material composition and an application thereof. The organic electroluminescent material composition of the present application comprise compound N and compound M, compound N and compound M cooperate with each other, resulting in an organic electroluminescent device comprising this material with better lifespan, lower driving voltage and higher efficiency at the same time.

Abstract: The present application relates to the technical field of display, in particular to an organic electroluminescent compound and an application. The present application provides an organic electroluminescent compound has a structure of the following: wherein R is selected from the following structure: use of organic electroluminescent devices containing this material can result in a more excellent lifespan, as well as lower driving voltage and higher efficiency.

Abstract: The present invention relates to the field of display technologies, and particularly to a fused polycyclic compound, a preparation method and use thereof. The fused polycyclic compound provided in the present invention has a structure of General Formula IV. The structure of the compound has ambipolarity, and the HOMO level and the LUMO level of the host material are respectively located on different electron donating group and electron withdrawing group, such that the transport of charges and holes in the host material becomes more balanced, thereby expanding the area where holes and electrons are recombined in the light emitting layer, reducing the exciton concentration, preventing the triplet-triplet annihilation of the device, and improving the efficiency of the device.

Abstract: The present invention provides a nitrogen-containing fused heterocyclic compound and applications thereof. When the nitrogen-containing fused heterocyclic compound of the present invention is used as a host material of an emitting layer of an organic light-emitting element, the organic light-emitting element has a lower driving voltage (3.8 V to 4.1 V), a higher current efficiency (15 Cd/A to 23 Cd/A or higher) and a longer service life (273 h or higher).

Abstract: The present invention provides a nitrogen-containing fused heterocyclic compound and applications thereof. When the nitrogen-containing fused heterocyclic compound of the present invention is used as a host material of an emitting layer of an organic light-emitting element, the organic light-emitting element has a lower driving voltage (4.3 V or lower), a higher current efficiency (16 Cd/A or higher) and a longer service life (230 h or higher).

Abstract: The present invention relates to the field of display technologies, and particularly to a fused polycyclic compound, and a preparation method and use thereof. The fused polycyclic compound provided in the present invention has a structure of General Formula IV. The structure of the compound has ambipolarity, and the HOMO level and the LUMO level of the host material are respectively located on different electron donating group and electron withdrawing group, such that the transport of charges and holes in the host material becomes more balanced, thereby expanding the area where holes and electrons are recombined in the light emitting layer, reducing the exciton concentration, preventing the triplet-triplet annihilation of the device, and improving the efficiency of the device.

Abstract: A dibenzoheterocyclic compound wherein band gaps of HOMO and LUMO energy levels of the dibenzoheterocyclic compound are wide, light can be emitted in a deep blue light-emitting region; and the LUMO energy level of the dibenzoheterocyclic compound is low, so the LUMO energy level matches with an electron transport layer for electrons injection and transport. The dibenzoheterocyclic compound has hole transport performance, so as a light-emitting layer material, the dibenzoheterocyclic compound balances the ratio of electrons to holes in a light-emitting layer increasing the combination probability and improving the device light-emitting efficiency. The spatial configuration of the dibenzoheterocyclic compound avoids material stacking molecules, reduces annihilation of excitons, and inhibits efficiency roll-off. The dibenzoheterocyclic compound has thermal stability, so deep blue light can be emitted efficiently and stably.

Abstract: A dibenzoheterocyclic compound wherein band gaps of HOMO and LUMO energy levels of the dibenzoheterocyclic compound are wide, light can be emitted in a deep blue light-emitting region; and the LUMO energy level of the dibenzoheterocyclic compound is low, so the LUMO energy level matches with an electron transport layer for electrons injection and transport. The dibenzoheterocyclic compound has hole transport performance, so as a light-emitting layer material, the dibenzoheterocyclic compound balances the ratio of electrons to holes in a light-emitting layer increasing the combination probability and improving the device light-emitting efficiency. The spatial configuration of the dibenzoheterocyclic compound avoids material stacking molecules, reduces annihilation of excitons, and inhibits efficiency roll-off. The dibenzoheterocyclic compound has thermal stability, so deep blue light can be emitted efficiently and stably.

Abstract: The present invention relates to the field of display technologies, and particularly to a fused polycyclic compound, a preparation method and use thereof. The fused polycyclic compound provided in the present invention has a structure of General Formula IV. The structure of the compound has ambipolarity, and the HOMO level and the LUMO level of the host material are respectively located on different electron donating group and electron withdrawing group, such that the transport of charges and holes in the host material becomes more balanced, thereby expanding the area where holes and electrons are recombined in the light emitting layer, reducing the exciton concentration, preventing the triplet-triplet annihilation of the device, and improving the efficiency of the device.

Abstract: The present invention relates to the field of display technologies, and particularly to a fused polycyclic compound, and a preparation method and use thereof. The fused polycyclic compound provided in the present invention has a structure of General Formula IV. The structure of the compound has ambipolarity, and the HOMO level and the LUMO level of the host material are respectively located on different electron donating group and electron withdrawing group, such that the transport of charges and holes in the host material becomes more balanced, thereby expanding the area where holes and electrons are recombined in the light emitting layer, reducing the exciton concentration, preventing the triplet-triplet annihilation of the device, and improving the efficiency of the device.