EFFECT OF SUBSTRATE-TEMPERATURE ON FILM GROWTH OF THE ORGANIC METAL (BEDT-TTF)(2)I-3

The vacuum evaporation method was modified for thin films of the organ ic charge-transfer complex (BEDT-TTF)(2)I-3. This modified evaporation method made it possible to investigate the effect of the substrate te mpearture on the film properties in detail. The thin films changed sys tematically from the alpha-phase of (BEDT-TTF)(2)I-3 to the beta-phase as the substrate temperature was raised from 40 degrees C to 60 degre es C. This was caused not by the transformation of the alpha-phase to the alpha(t)-phase but by the growth of two different phases. The morp hology and the structure of the deposited films were also examined by atomic force microscopy and X-ray diffraction.