Application to electronic devices using organic thin films by ion-beam-evaporation method

Among various methods for preparation of organic thin films, we proposed an ion implantation technique using positive ion beams of low energy under 50 ~ 100 eV. The Al electrolytic capacitor with charge transfer complex as solid electrolyte, the electroluminescent (EL) diode with double-layer structure (Mg:In/Alq3/TPD/ITO) and the solar cell with Schottky junction or heterojunction of organic thin films were prepared by this method. The solid electrolytic capacitor with a good high frequency response of impedance was obtained to use the evaporated films. The light emission intensity and the life time of EL diodes were higher and longer than that of the conventional thermal deposition method. The conversion efficiency of the solar cells was 1.2 % in the case of Schottky structure (Al/CuPc/ITO) with the phthalocyanine compounds.