WANG Wei1, DAI Zuo-hai1, WANG Xiao-lei1, et al. Influence of dopant incomplete ionization on MISiC gas sensor[J]. 2010, 29(9): 67-69+73. DOI: 10.13873/j.1000-97872010.09.022.
The influence of incomplete ionization on characteristics of metal-insulator-SiC(MISiC) gas sensor is studied.Possion’s equation in space charge region of MISiC devices is built up by taking Pool-Frenkel effect and electric field into account.The potential distribution of MISiC is achieved by the numerical solution of the Possion’s equation
then the I-V and C-V characteristics of MISiC gas sensor are also got.The results show that the dopant in SiC can’t be completely ionized at room temperature and the ionized ratio will be increased as temperature rises.In addition
the ionized ratio will be increased when the electric field exists
which eventually causes the shift of the device’s I-V and C-V characteristics curve.
Status of silicon carbide (SiC) as a wide-bandgap semiconductor for high-temperature applications: A review [J] . J.B. Casady,R.W. Johnson. Solid State Electronics . 1996 (10)