Kinetic cause light emitting device and preparation method thereof

Abstract

The invention provides a kinetic cause light emitting device and a preparation method thereof. The light emitting device comprises a kinetic cause light emitting layer made of an organic light emitting material having an amorphous kinetic cause light emitting property, the organic light emitting material employed by the kinetic cause light emitting layer contains a charge transfer (CT) molecule consisting of a benzophenone electron withdrawing group and an aromatic amine electron donating group, and the color of the kinetic cause light emitting can be adjusted and controlled by adjusting the intensity of the CT state, and beneficial to study the kinetic cause light emitting property and widen the application of the same in different environments. In addition, according to the kinetic causelight emitting device and preparation method thereof, the light emitting materials have very high light emitting quantum efficiency and typical thermal activation delayed fluorescence (TADF) property, which can be used in the preparation of optoelectronic devices.

Description

technical field [0001] The invention relates to the field of mechanoluminescent materials, in particular to the application of a novel organic luminescent material containing diphenylphosphine groups in the field of mechanoluminescence. Background technique [0002] Mechanoluminescence (ML) refers to the phenomenon that a substance is excited to emit light under the action of external forces (such as grinding, friction, scratching, cutting, shearing, crushing, pressure, etc.), also known as triboluminescence (Triboluminescence). ,TL). Compared with other types of luminescent materials such as photoluminescence, chemiluminescence, and electroluminescence, mechanoluminescent materials have the special property of inducing luminescence by external forces, and they are resistant to external stresses such as pressure, tension, shear force, and impact. Very sensitive optical response, widely used as pressure-sensitive luminous body, forecast monitor, new light source display, pre...

AI Technical Summary

Problems solved by technology

In addition, the aggregation state of solid molecules tends to change to an amorphous state under the stimulation of external forces such as pressure and shear force. In traditional pure organic mechanoluminescence molecules, the mechanoluminescence phenomenon occurs when the crystals are broken, and when the solid molecules When the aggregated state continuously transforms to the amorphous state, its mechanoluminescent properties disappear

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