Thermoluminescence of chemical vapor deposited diamond film

Diamond films were synthesized by a chemical vapor deposition (CVD). Raman spectrum showed the diamond line at 1332 cm(-1) and X-ray diffraction pattern exhibited a strong (111) peak of diamond. The scanning electron microscopy analysis showed that the CVD diamond film was grown to be unepitaxial crystallites with pyramidal hillocks. Three-dimensional thermoluminescence spectrum of CVD diamond film irradiated with X-ray produced one peak at 560 K and 430 nm. The main 560 K glow curve was caused by first order kinetics. Activation energy, and escape frequency of the main peak were calculated to be 0.92similar to1.05 eV and 3.4 x 10(7) s(-1) respectively. The emission spectrum at 560 K was split into 1.63 eV, 2.60 eV, and 3.07 eV emission bands that were found to be associated with silicon-vacancy center, H3, and A center, respectively.