Synthesis and characterization of two-layer-structured ZnO p-n homojunctions by ultrasonic spray pyrolysis

Bian, J.M.; Li, X.M.; Zhang, C.Y.; Chen, L.D.; Yao, Q.
May 2004
Applied Physics Letters;5/10/2004, Vol. 84 Issue 19, p3783
Academic Journal
The two-layer-structured ZnO p-n homojunctions were prepared on single-crystal Si (100) substrate by depositing undoped n-type ZnO film on N-In codoped p-type ZnO film using ultrasonic spray pyrolysis. The crystal structure and morphology of the obtained ZnO homojunctions were examined by x-ray diffraction, scanning electron microscopy, and atomic force microscopy. The two-layer structure was confirmed by secondary ion mass spectroscopy depth profile analysis. The currentvoltage (I-V) characteristics derived from the undoped ZnO/N-In codoped ZnO two-layer structure clearly show the rectifying characteristics of typical p-n junctions.


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