N. M. Abd-Alghafour, Naser M. Ahmed, and Z. Hassan
الملخص الانجليزي
The fabrication and characterization of a metal–semiconductor–metal (MSM) visible photodetector based
on V2O5 NRs are investigated. V2O5 nanorods (NRs) is synthesized on p-type Si(100) by spray pyrolysis
method. The MSM photodetector is based on V2O5 NRs grown on Si(100) substrate. Structural and optical
properties of the V2O5 NRs are studied using high resolution X-ray diffraction, field emission-scanning
electron microscopy and photoluminescence spectroscopy. The results reveal an orthorhombic structure
with preferred orientation along (001) plane of the prepared V2O5 NRs. Photoluminescence (PL) spectra
show intensive and sharp green light emission at about 535 nm with high intensity. Upon exposure
illumination to 540 nm (1.535 mW/cm2) at an applied voltage of 5 V, the device Exhibit 260.96 × 102
sensitivity; photodetector gain of device is 270, photoresponse peak of 0.948 A/W and photocurrent of
2.7 × 10−4A. The response and recovery times are determined as 0.787 s and 0.541 s, respectively; upon
exposure to 540 nm light at 5 V applied bias. The obtained results indicate that the V2O5 NRs is a promising
candidate for high performance as a MSM photodetector for commercially photoelectronic applications.
نبيل محمد عبدالغفور | Nabeel Mohammed Abd-Alghafour | 1614