Effect of x-ray radiation on the IV characteristic of ZnO- A1 junction.
Date
10-2011
Degree
Bachelor of Science in Applied Physics
College
College of Arts and Sciences (CAS)
Adviser/Committee Chair
Lou Serafin M. Lozada
Co-adviser
Joybel G. Bugna
Abstract
The effect of X-ray radiation to the electrical property of zinc oxide (ZnO) deposited on aluminum (Al) was investigated. ZnO film was deposited on Al substrate through electrophoretic deposition (EPD) at constant 250 V for 2 minutes. The process was done under room temperature. All samples were annealed in air at 310°C for one hour. Electron micrographs showed that ZnO film is porous with an average grain size of 0.40 iim ± 0.01 pm and average thickness of 41.23 pm ± 0.44 pm. Peaks found in the XRD spectra correspond to wurtzite structure of ZnO. After X-ray exposure, it was observed that X-ray irradiation has no apparent effect on the morphology and crystal structure of the ZnO layer. To measure the 1V characteristic of the ZnO-Al junction, copper wires were used as contact electrodes, one attached on the ZnO and the other on the Al substrate. The samples resulted to nonlinearly increasing (rectifying) IV curve for forward bias voltage 1-, 5-, 10-, and 15 V. Irradiation caused the current produced in each bias voltage to increase. Moreover, during irradiation, the current behaved linearly with the bias voltage. After the irradiation, the IV curve returned back to its exponential behavior however a greater turn-on voltage was already observed. The response of the ZnO-Al junction to X-ray radiation is favorable for possible radiation sensing applications.
Keywords: 81.15.Pq Electrodeposition, 78.30.Fs II-VI semiconductors, 87.53.Bn X-rays, 87.53.-j Ionizing radiation effects, 85.30.Hi, 85.30.Kk Schottky barrier diodes
Language
English
Location
UPLB Main Library Special Collections Section (USCS)
Call Number
Thesis
Recommended Citation
Como, Emma Consuelo O., "Effect of x-ray radiation on the IV characteristic of ZnO- A1 junction." (2011). Undergraduate Theses. 10364.
https://www.ukdr.uplb.edu.ph/etd-undergrad/10364
Document Type
Thesis