Deep level transient spectroscopy (DLTS) and optically excited DLTS ar
e applied to investigate the defect distribution in IIb synthetic diam
ond. Two defects at 0.83 and 1.25 eV above the valence band edge are d
etected. Capacitance-voltage measurements reveal a boron doping densit
y of 7 x 10(15) cm(-3) and a trap density at 0.83 eV of approximate to
10(15) cm(-3). The results are discussed in comparison with data avai
lable in the literature. (C) 1998 American Institute of Physics. [S002
1-8979(98)03323-4].