Spin-Coating and Aerosol Spray Pyrolysis Processed Zn1-xMgxO Films for UV Detector Applications

A series of Zn1−xMgxO thin films with the composition range of x from 0 to 0.8 has been prepared by spin coating and aerosol spray pyrolysis deposition on Si and quartz substrates. The morphology, composition, nano-crystalline structure, optical and vibration properties of the prepared films were studied by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), optical and Raman scattering spectroscopy. The optimum conditions of thermal treatment of films prepared by spin coating have been determined from the point of view of their crystallinity. The content of crystalline phases in films as well as their optical band gap has been determined as a function of the chemical composition. Heterostructure photodetectors were developed and investigated on the basis of the prepared films. Their operation in the injection photodiode mode at forward biases has been demonstrated. A device design based on two Zn1−xMgxO thin films with different x values was proposed for extending the operational forward bias range and improving its responsivity, detectivity, and selectivity to UV radiation.

MORARI Vadim;  VEACESLAV Ursaki;  RUSU Emil;  ZALAMAI Victor;  COLPO Pascal;  TIGINYANU Ion; 

2022-09-28

MDPI

JRC130527

2079-4991 (online),   

https://www.mdpi.com/2079-4991/12/18/3209,    https://publications.jrc.ec.europa.eu/repository/handle/JRC130527,   

10.3390/nano12183209 (online),