Trifluoreneamine compound, trifluoreneamine polymer luminescent material and preparation methods and application thereof

Abstract

The invention discloses a trifluoreneamine compound, a trifluoreneamine polymer luminescent material and preparation methods and application thereof. The material takes trifluoreneamine as a framework; the bipolarity and the illuminant color of the luminescent material can be regulated and controlled by changing the chemical structure of a side chain of the trifluoreneamine polymer luminescent material; and the chemical structure of the material is shown in the specifications. The preparation method comprises the following steps of: performing a series of simple reactions on fluorene serving as an initial reaction raw material; and performing a Suzuki coupling reaction under the catalysis of palladium and performing double-boric acid ester alternative copolymerization on fluorene to obtain a target polymer, namely the luminescent material. The material is easy to synthesize, is convenient to purify, has higher solubility, film forming property, and film form stability and high photoluminescence and electrofluorescence efficiencies, and is applied to a polymer electroluminescent diode luminous layer.

Description

Trifluorenamine compound, trifluorenamine polymer luminescent material, preparation method and application technical field The invention relates to a light-emitting conjugated polymer material, in particular to a polymer light-emitting material with trifluorenamine as a skeleton, a preparation method thereof, and an application of the material in a polymer light-emitting diode. Background technique Since Burroughes and Friend first reported polymer light-emitting diodes (PLEDs), in the past nearly two decades, PLEDs have aroused intense research and development interest in fabricating ultra-thin, full-color, and large-area flat-panel displays. made great progress. The solution processability of PLEDs allows people to prepare devices by low-cost printing techniques, such as inkjet printing and screen printing, which are lower in cost than vacuum-evaporated small-molecule organic light-emitting diodes. is also more feasible. In order to realize PLEDs-based flat-panel displ...

AI Technical Summary

Problems solved by technology

The most representative of the existing polymer blue light-emitting materials is polyfluorene, but because of the rigid planar structure of fluorene, the material is easy to form an excimer complex and emit long-wavelength light, which seriously affects the saturated color of the light emitted by the device. Purity and stability of emission color

At the same time, polyfluorene has a higher hole injection barrier due to its lower lowest occupied molecular orbital (HOMO) energy level.

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