| dc.description.abstract | In this thesis we investigated the structure, optical absorption, and electroluminescence of organic dye molecule thin films, and further employed the film to design the strongly-coupled microcavity devices and to simulate the phenomena of polariton states. We used the DEDOC dye molecule to produce a highly-absorbing J-aggregate film. We calculated the film thickness by iteratively fitting the R and T spectra. The optimal fitting yields the total thickness of assembled layers, which is well matched with the AFM measurements. The peak absorption coefficient α was extracted to be 10 6/cm. Next, we investigated the electroluminescence of DEDOC J-aggregate films based on OLED configuration, and analyzed the relation between the EQE and morphology of films made from different processes. With layer-by-layer assembly, the best EQE of 5×10-3% was achieved. We then integrated the DEDOC J-aggregate films into microcavities and simulated the strongly-coupled phenomena. In such a microcavity, we used a red light OLED system as a pumping source for polaritonic luminescence, and DEDOC J-aggregate films as the medium to produce polariton states. We used the Hamiltonian matrix model and multilayer matrix model to predict the exciton-photon coupling in the microcavity. By simulating the electrical field distribution, reflectivity spectrum, and dispersion of polariton states, we obtained the optimal design of strongly-coupled microcavity. In experiments, we chose the TPB3 and DCJTB co-doping red light OLED system, and studied the emitting wavelength, light intensity, and stability under the condition of the best microcavity design. The current study on materials and microcavity design serves an important preliminary research for realization of polariton electroluminescence in the future. | en_US |