Author/Authors :
Jie Xiao، نويسنده , , N. Lozova، نويسنده , , Ya.B. Losovyj، نويسنده , , D. Wooten، نويسنده , , I. Ketsman، نويسنده , , M.W. Swinney، نويسنده , , J. Petrosky، نويسنده , , J. McClory، نويسنده , , Ya.V. Burak، نويسنده , , V.T. Adamiv، نويسنده , , A.T. Brant، نويسنده , , P.A. Dowben، نويسنده ,
Abstract :
We have compared the photovoltaic charging of the (1 0 0) surface termination for Cu doped and undoped Li2B4O7. While the surface charging at the (1 0 0) surface of Li2B4O7 is significantly greater than observed at (1 1 0) surface, the Cu doping plays a role in reducing the surface photovoltage effects. With Cu doping of Li2B4O7, the surface photovoltaic charging is much diminished at the (1 0 0) surface. The density of states observed with combined photoemission and inverse photoemission remains similar to that observed for the undoped material, except in the vicinity of the conduction band edge.
