[Study on ZnTe (Znte:Cu) polycrystalline films by XPS].
ZnTe and ZnTe: Cu polycrystalline films were fabricated by means of co-evaporating at room temperature. The relationships between conductivity of the films and temperature were measured. Chemical compositions of ZnTe and ZnTe: Cu polycrystalline films were obtained by using XPS, and the changes of chemical composition before and after anneal were analyzed. The results showed that the conductivity of ZnTe rose linearly with the temperature, and Te was enriched on the margin of every sample's surface; With the rise in temperature, the conductivity of ZnTe: Cu films became abnormal, the oxidization of Te became very obvious and Zn diffused from the bulk to the surface. The composition became more uniform and all peaks became stronger. Carrier concentration caused by CuxTe appeared, resulting in the abnormal relationship between conductivity of the films and temperature.
Zhong
Yong-qiang
YQ
College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China.
Zheng
Jia-gui
JG
Feng
Liang-huan
LH
Cai
Wei
W
Cai
Ya-ping
YP
Zhang
Jing-quan
JQ
Li
Bing
B
Lei
Zhi
Z
Li
Wei
W
Wu
Li-li
LL