RT Journal Article
T1 Direct observation of potential barrier formation at grain boundaries of SnO_2 ceramics
A1 Maestre Varea, David
A1 Cremades Rodríguez, Ana Isabel
A1 Piqueras De Noriega, Francisco Javier
AB Remote electron beam induced current (REBIC) and cathodoluminescence (CL) modes in the scanning electron microscope (SEM) have been used to investigate SnO2 sintered samples. The study of the electrically active boundaries present in the oxide shows a characteristic peak and trough (PAT) contrast after thermal treatments in oxygen. Temperature-dependent measurements of the REBIC contrast show the presence of a shallow defect level 60 meV below the conduction band. This level is asigned to oxygen species adsorbed on the defect-rich boundaries. Evolution of REBIC contrast of the grain boundaries with excitation density enabled us to perform local measurements of minority carrier diffusion length.
PB Iop Publishing Ltd
SN 0268-1242
YR 2004
FD 2004-11
LK https://hdl.handle.net/20.500.14352/50847
UL https://hdl.handle.net/20.500.14352/50847
LA eng
NO © 2004 IOP Publishing Ltd.This work has been supported by MCYT (Project MAT 2003-00455). DM acknowledges a grant from MCYT.
NO MCYT
DS Docta Complutense
RD 13 may 2025