Author/Authors :
Lu، نويسنده , , Y.F and Wu، نويسنده , , K.W. and Zeng، نويسنده , , Y.J. and Ye، نويسنده , , Z.Z. and Huang، نويسنده , , J.Y. and Zhu، نويسنده , , L.P. and Zhao، نويسنده , , B.H.، نويسنده ,
Abstract :
Growth of Na-doped ZnO thin films by low-pressure metal–organic chemical vapor deposition method was realized using cyclopentadienylsodium as the sodium source. Secondary ion mass spectrometry measurements revealed the existence of Na in the ZnO thin films. Low-temperature scanning tunneling microscopy and scanning tunneling spectroscopy were used for obtaining local density of states (LDOS) of the Na-doped ZnO thin films at nanometer scale. The local measurements indicated a spatial distribution of the LDOS as well as the conductivity type that could be linked to spatial variations of Na doping level.
