Thin Solid Films, Vol.283, No.1-2, 8-11, 1996
Transparent Contacts to Beta-SiC for Optical Electronic Device Applications
Transparent indium tin oxide (ITO)/beta-silicon carbide (beta-SiC) Schottky barrier and ohmic contact have been successfully Fabricated by sputtering ITO films on rapid thermal chemical vapor deposition (RTCVD) prepared beta-SiC grown heteroepitaxially on a (111) silicon substrate. The transmission line method (TLM) was used to determine the specific contact resistance of the ITO/n-SiC ohmic contact for varying operation temperatures. It was found that the specific contact resistance is 0.56 Ohm cm(2) for a temperature of 300 K and decreases with increasing temperature. The indium (In)/n-SiC, Ni-Cr/n-SiC ohmic contact systems were also developed for comparison purposes. In addition, the influence of operating temperature on the C-V characteristics of the ITO/p-SiC Schottky barrier was studied. It reveals that the ideality factor n is in the range of 2.3-1.44 for temperature ranging from 300 to 473 K. The barrier height Phi(B)(C-V) is 1.61-1.23 eV with varying operation temperature from 300 to 473 K for C-V measurement.