EFFECT OF DEPOSITION TEMPERATURE ON THE PHOTOLUMINESCENCE PROPERTIES OF A-C-H FILMS

A study is made of the photoluminescence characteristics (fatigue, Sto kes and anti-Stokes emission, decay kinetics) of films of amorphous di amond-like carbon (a-C:H) obtained at various substrate temperatures, T-s=25-430 degrees C. These data demonstrate the temperature dependenc e of the sp(2)/sp(3) ratio, which determines the photoluminescence eff iciency. It is shown that photoluminescence fatigue is related to the presence of metastable C-H-C bonds, some of which also are determined by T-s. (C) 1996 American Institute of Physics.