Nj. Pulsford et al., BEHAVIOR OF A RECTIFYING JUNCTION AT THE INTERFACE BETWEEN POROUS SILICON AND ITS SUBSTRATE, Journal of applied physics, 75(1), 1994, pp. 636-638
The current injection into metal/porous Si/bulk Si diodes is investiga
ted by transport and photoresponse measurements. Under low forward bia
s, the diode current is determined by the space charge region at the p
orous Si/bulk Si interface. The activation energy of the photovoltage
shows that holes are injected into porous Si states which have little
quantum confinement. This is discussed in terms of the confinement mod
el for porous Si photoluminescence.