Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7136544 | Sensors and Actuators A: Physical | 2015 | 28 Pages |
Abstract
An ultraviolet photodiode based on rutile TiO2 nanorods, which were grown on p-type Si substrate seeded with a TiO2 layer, was synthesized by radiofrequency reactive magnetron sputtering. Chemical bath deposition was performed to grow rutile TiO2 nanorods. X-ray diffraction and field emission-scanning electron microscopy were conducted to determine the structural and optical properties of the sample. The synthesized TiO2 nanorods exhibited tetragonal rutile structure. The device showed 3.79Â ÃÂ 102 sensitivity when it was exposed to 325Â nm light (1.6Â mW/cm) at 5Â V bias voltage. In addition, the internal gain of the photosensor was 4.792 and the photoresponse peak was 460Â mA/W. The photocurrent was 6.09Â ÃÂ 10â4Â A. The response and recovery times of the PD were 50.8 and 57.8Â ms, respectively, upon illumination of a pulsed UV light (325Â nm, 1.6Â mW/cm2) at 5Â V bias voltage.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Abbas M. Selman, Z. Hassan,