Anthracene Derivative Light-Emitting Element for Low Power High Luminance

The patent modifies the molecular structure of anthracene derivatives by introducing specific substituents (electron-donating groups like dialkylamino groups at positions 2 and 6, and electron-withdrawing groups like carbonyl groups at positions 9 and 10) to optimize the HOMO-LUMO energy gap. This structural parameter change enables the material to achieve both low power consumption and high light-emitting efficiency by facilitating efficient charge injection and radiative recombination.

The patent employs composite light-emitting layers combining anthracene derivative host materials with guest luminescent compounds. This composite structure allows energy transfer from the host to the guest, achieving high external quantum efficiency while maintaining low operating voltages and reduced power consumption through synergistic material properties.

The patent optimizes the energy levels (HOMO and LUMO) of the anthracene derivative to match well with common electrode materials and transport layers, enabling efficient charge injection at low voltages. The modified molecular structure achieves high luminance through enhanced radiative recombination efficiency while maintaining low power consumption via reduced operating voltage.

The patent utilizes triplet excitons that would normally be lost as heat in conventional fluorescent materials. By incorporating phosphorescent guest compounds or heavy metal atoms into the anthracene derivative structure, the material can harvest both singlet and triplet excitons for light emission, effectively skipping the energy loss step and achieving high luminance with low power consumption.