Electrical performance of Schottky diodes based on macroporous silicon and titanium oxide extracted from Malagasy ilmenite
This work presents the synthesis and electrical characterization of Schottky diodes based on Ag/TiO2/macroporous silicon (MPS), where titanium dioxide is extracted from Malagasy ilmenite. The MPS structures were fabricated using a silver-assisted chemical etching method, and TiO2 was deposited by im...
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Elsevier
2025-09-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379725002979 |
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| author | Andry-zo Randrianantoandro Mehdi Rahmani Aymen Selmi Rabesiranana Naivo Abdelaziz Meftah |
| author_facet | Andry-zo Randrianantoandro Mehdi Rahmani Aymen Selmi Rabesiranana Naivo Abdelaziz Meftah |
| author_sort | Andry-zo Randrianantoandro |
| collection | DOAJ |
| description | This work presents the synthesis and electrical characterization of Schottky diodes based on Ag/TiO2/macroporous silicon (MPS), where titanium dioxide is extracted from Malagasy ilmenite. The MPS structures were fabricated using a silver-assisted chemical etching method, and TiO2 was deposited by immersion in an acid-based solution for various durations. Structural analyses via FTIR, Raman spectroscopy, and XRD confirmed the successful deposition of TiO2 on MPS surface, revealing the coexistence of anatase, rutile, and brookite phases for titanium dioxide. Electrical performance was evaluated through current–voltage (I-V) and capacitance–voltage (C-V) measurements. The diode characteristics such as ideality factor, series resistance, and barrier height were found to be strongly dependent on immersion time. Optimal diode behavior, including enhanced rectification and reduced series resistance, was observed for immersion times between 5 and 15 min. Frequency-dependent C–V and conductance–voltage (G–V) measurements indicated significant interfacial effects and charge trapping phenomena. These findings highlight the potential of TiO2-modified MPS structures for advanced electronic and optoelectronic applications. |
| format | Article |
| id | doaj-art-84f906481fee4c4893d5a3fcb9296075 |
| institution | Kabale University |
| issn | 2211-3797 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj-art-84f906481fee4c4893d5a3fcb92960752025-08-25T04:14:23ZengElsevierResults in Physics2211-37972025-09-017610840310.1016/j.rinp.2025.108403Electrical performance of Schottky diodes based on macroporous silicon and titanium oxide extracted from Malagasy ilmeniteAndry-zo Randrianantoandro0Mehdi Rahmani1Aymen Selmi2Rabesiranana Naivo3Abdelaziz Meftah4Laboratory of Nanomaterials, Nanotechnology and Energy, Department of Physics, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092 El Manar, Tunis, Tunisia; Department of Nuclear Analyses and Techniques, Institut National des Sciences et Techniques Nucléaires, INSTN, B.P. 3907 Antananarivo, MadagascarLaboratory of Nanomaterials, Nanotechnology and Energy, Department of Physics, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092 El Manar, Tunis, Tunisia; Higher Institute of Applied Sciences and Technology of Kairouan - University of Kairouan, Dar El Amen University Campus, 3100 Kairouan, Tunisia; Corresponding author.Laboratory of Materials Organisation and Properties (LR99ES17), Faculty of Sciences of Tunis, University of Tunis El Manar, 2092 El Manar, Tunis, TunisiaDepartment of Nuclear Analyses and Techniques, Institut National des Sciences et Techniques Nucléaires, INSTN, B.P. 3907 Antananarivo, MadagascarLaboratory of Nanomaterials, Nanotechnology and Energy, Department of Physics, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092 El Manar, Tunis, TunisiaThis work presents the synthesis and electrical characterization of Schottky diodes based on Ag/TiO2/macroporous silicon (MPS), where titanium dioxide is extracted from Malagasy ilmenite. The MPS structures were fabricated using a silver-assisted chemical etching method, and TiO2 was deposited by immersion in an acid-based solution for various durations. Structural analyses via FTIR, Raman spectroscopy, and XRD confirmed the successful deposition of TiO2 on MPS surface, revealing the coexistence of anatase, rutile, and brookite phases for titanium dioxide. Electrical performance was evaluated through current–voltage (I-V) and capacitance–voltage (C-V) measurements. The diode characteristics such as ideality factor, series resistance, and barrier height were found to be strongly dependent on immersion time. Optimal diode behavior, including enhanced rectification and reduced series resistance, was observed for immersion times between 5 and 15 min. Frequency-dependent C–V and conductance–voltage (G–V) measurements indicated significant interfacial effects and charge trapping phenomena. These findings highlight the potential of TiO2-modified MPS structures for advanced electronic and optoelectronic applications.http://www.sciencedirect.com/science/article/pii/S2211379725002979Macroporous siliconTitanium oxideRamanI–V and C-V measurements |
| spellingShingle | Andry-zo Randrianantoandro Mehdi Rahmani Aymen Selmi Rabesiranana Naivo Abdelaziz Meftah Electrical performance of Schottky diodes based on macroporous silicon and titanium oxide extracted from Malagasy ilmenite Results in Physics Macroporous silicon Titanium oxide Raman I–V and C-V measurements |
| title | Electrical performance of Schottky diodes based on macroporous silicon and titanium oxide extracted from Malagasy ilmenite |
| title_full | Electrical performance of Schottky diodes based on macroporous silicon and titanium oxide extracted from Malagasy ilmenite |
| title_fullStr | Electrical performance of Schottky diodes based on macroporous silicon and titanium oxide extracted from Malagasy ilmenite |
| title_full_unstemmed | Electrical performance of Schottky diodes based on macroporous silicon and titanium oxide extracted from Malagasy ilmenite |
| title_short | Electrical performance of Schottky diodes based on macroporous silicon and titanium oxide extracted from Malagasy ilmenite |
| title_sort | electrical performance of schottky diodes based on macroporous silicon and titanium oxide extracted from malagasy ilmenite |
| topic | Macroporous silicon Titanium oxide Raman I–V and C-V measurements |
| url | http://www.sciencedirect.com/science/article/pii/S2211379725002979 |
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