The Luminescence Of Organic Conjugated Molecules In High Polymer Disperser Systems

Organic conjugated molecule has strong absorption but no emission in visible range in solid phase. The most of high polymers are linear molecules in one dimension. Once the ringed conjugation molecules are dispersed in polymers, they are well separated and become emission center. The work present in this thesis focuses on the investigation luminescence of organic conjugated molecules in disperser systems using spectroscopic method, to find the suitable converter for white light LED.The results show that the emission spectrum depends on the structure of molecule, and shifts to red with increasing of number of n electrons in the molecule. While the luminous efficiency is dominated by the high polymer disperser systems, i.e. the matrix around molecules, which has some influence on the color of luminescence as well. It is found that, compared with the rest of organic conjugated molecules in various high polymer disperser systems investigated in this thesis, anthrone derivative-LLDPE film is the best converter to produce white light LED via light conversion. The ways to further enhance the luminescence of organic conjugated molecules in disperser systems and to develop new luminescent material have been discussed. The future developments of the work have also been suggested in this thesis.