Optical and Electronic Properties of Passivated InP(001) Surfaces.

The effect of chemical passivation in solutions of ammonium sulfide (NH4)2S on the optical and electronic properties of the surface n-InP (001) is studied. It is shown that treatment in a 4% aqueous solution of (NH4)2S leads to a twofold decrease in the surface field and charges localized in this region. Treatment in a 4% alcohol solution (NH4)2S leads to a decrease in these parameters by a factor of 3, and, moreover, the barrier photovoltage decreases by a factor of 3. [ABSTRACT FROM AUTHOR]