Anthracene-centered Conjugated Molecules: Synthesis And Optoelectronic Functions

Organic optoelectronic molecules are usually used for organic light emittingdiode as films or aggregates. The discovery of aggregation induced emission (AIE)molecular systems has solved the problem of aggregation caused fluorescencequenching (ACQ). And the high solid luminous efficiency of AIE molecular hassupplied a novel method to prepare high-performance OLED (High Efficiency, LongLife-Time). So we synthesize anthracene-centered linear and cruciform derivatives, onthis basis, these derivatives are prepared for OLED. And the OLED of the AIEmaterials exhibit higher performance.In the third chapter, we study the aggregation-enhanced emission of the linearderivatives firstly. In the THF/water mixtures, the emission intensity of dyes aregreatly enhanced obviously when the volume ratio of the mixtures achieve1:9. Andthis character is beneficial to the achievement of high light emitting device. Then, theorganic electroluminescence devices of linear derivatives have been obtianed. With thedifference of the substituent group, the emitting light of these three devices exhibitfrom green to red. Also, the maximum luminous efficiency and the maximumluminance increase up to3times and1times separately. And the initial voltage drop to3.2V.In the fourth chapter, we research the piezofluorochromic behaviour of thecruciforms firstly. Obvious redshift is observed when the sample deal with grinding.However, when the pressed sample is annealed or exposed to solvent vapor, thefluorescence color will return to the initial state. This indicates that grinding hasinduced the phase transition of the sample from crystalline to amorphous states.Secondly, we obtian the electroluminescence devices of these cruciforms with theconstruction of ITO/PEDOT:PSS/BzAm/TPBi/LiF/Al. It turned out that the luminousefficiency and the maximum luminance achieve1.1cd/A and3500cd/m2separately.So the cruciforms can be used for the constructing of solution processable and high-performance organic electroluminescence devices.