Abstract
A novel ITO/AZO/SiO2/p-Si SIS heterojunction has been fabricated by low temperature thermal growth of an ultrathin silicon dioxide and RF sputtering deposition of ITO/AZO double films on a p-Si texturized substrate. The crystalline structure and the optical and electrical properties of the ITO/AZO antireflection films were characterized by X-ray diffraction (XRD), UV-VIS spectrophotometry, and four-point probe measurements, respectively. The results show that the ITO/AZO films are of good quality. The electrical junction properties were investigated by I - V measurement, which reveals that the heterojunction shows strong rectifying behavior under a dark condition. The ideality factor and the saturation current of this diode are 2.3 and 1.075×10-5 A, respectively, and the value of IF/IR (IF and IR stand for forward and reverse current, respectively) at 2 V is found to be as high as 16.55. The junction shows fairly good rectifying behavior, indicating the formation of a diode between AZO and p-Si. High photocurrent is obtained under a reverse bias when the crystalline quality of ITO/AZO double films is good enough to transmit the light into the p-Si. Crown
Original language | English (US) |
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Pages (from-to) | 664-671 |
Number of pages | 8 |
Journal | Superlattices and Microstructures |
Volume | 46 |
Issue number | 4 |
DOIs | |
State | Published - Oct 2009 |
Externally published | Yes |
Keywords
- Al-doped ZnO (AZO)
- Current-voltage (I - V) characteristics
- Indium tin oxide (ITO)
- SIS heterojunction
- Sputtering
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Electrical and Electronic Engineering