Artículos de revistas
Sensitivity of metal oxide gas sensors to non-parabolic intergranular barriers
Fecha
2017-03-01Registro en:
Buono, Camila; Mirabella, D.A.; Aldao, Celso Manuel; Sensitivity of metal oxide gas sensors to non-parabolic intergranular barriers; Elsevier Science Sa; Sensors and Actuators B: Chemical; 246; 01-3-2017; 1025-1029
0925-4005
CONICET Digital
CONICET
Autor
Buono, Camila
Mirabella, D.A.
Aldao, Celso Manuel
Resumen
We analyze the electrical conductivity of polycrystalline semiconductor solids due to the presence ofSchottky-type potential barriers formed at intergrains. The density of charged dopants along the grains isusually considered constant leading to parabolic intergranular potential barriers. If temperature is highenough to allow sufficiently mobility to the dopants, their resulting equilibrium distribution is far fromconstant leading to potential barriers that show a strong non-parabolic character. Implications for theelectrical conductivity and then on the sensitivity to barrier height and sample doping in metal oxide gassensors are discussed.