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- Title
Investigations of In 2 O 3 Added SiC Semiconductive Thin Films and Manufacture of a Heterojunction Diode.
- Authors
Liao, Chia-Te; Kao, Chia-Yang; Su, Zhi-Ting; Lin, Yu-Shan; Wang, Yi-Wen; Yang, Cheng-Fu
- Abstract
This study involved direct doping of In2O3 into silicon carbide (SiC) powder, resulting in 8.0 at% In-doped SiC powder. Subsequently, heating at 500 °C was performed to form a target, followed by the utilization of electron beam (e-beam) technology to deposit the In-doped SiC thin films with the thickness of approximately 189.8 nm. The first breakthrough of this research was the successful deposition of using e-beam technology. The second breakthrough involved utilizing various tools to analyze the physical and electrical properties of In-doped SiC thin films. Hall effect measurement was used to measure the resistivity, mobility, and carrier concentration and confirm its n-type semiconductor nature. The uniform dispersion of In ions in SiC was as confirmed by electron microscopy energy-dispersive spectroscopy and secondary ion mass spectrometry analyses. The Tauc Plot method was employed to determine the Eg values of pure SiC and In-doped SiC thin films. Semiconductor parameter analyzer was used to measure the conductivity and the I-V characteristics of devices in In-doped SiC thin films. Furthermore, the third finding demonstrated that In2O3-doped SiC thin films exhibited remarkable current density. X-ray photoelectron spectroscopy and Gaussian-resolved spectra further confirmed a significant relationship between conductivity and oxygen vacancy concentration. Lastly, depositing these In-doped SiC thin films onto p-type silicon substrates etched with buffered oxide etchant resulted in the formation of heterojunction p-n junction. This junction exhibited the rectifying characteristics of a diode, with sample current values in the vicinity of 102 mA, breakdown voltage at approximately −5.23 V, and open-circuit voltage around 1.56 V. This underscores the potential of In-doped SiC thin films for various semiconductor devices.
- Subjects
THIN films; BREAKDOWN voltage; SECONDARY ion mass spectrometry; CHARGE carrier mobility; SEMICONDUCTOR thin films; HALL effect; X-ray photoelectron spectroscopy; N-type semiconductors
- Publication
Nanomaterials (2079-4991), 2024, Vol 14, Issue 10, p881
- ISSN
2079-4991
- Publication type
Article
- DOI
10.3390/nano14100881