Characterization and luminescence properties of the dye-doped polymer Langmuir-Blodgett films

1,1,4,4-Tetraphenyl-1,3-butadiene (TPB) was successfully introduced into th e polymer multilayer films by means of Langmuir-Blodgett (LB) technique. Re sults of UV-VIS spectra and X-ray diffraction showed that the uniform films had a layer structure similar to the superlattice of organic multiple quan tum wells. The electroluminescence (EL) devices fabricated from the doped p olymer LB films emitted blue light. Compared with the casting films, the ph otoluminescence (PL) and EL spectra showed that the exciton energy shifts t o higher and the half-width of the emission peak becomes narrower due to ex citon confinement effect.