Electrical performance of Schottky diodes based on macroporous silicon and titanium oxide extracted from Malagasy ilmenite

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics Pub Date : 2025-08-19 DOI:10.1016/j.rinp.2025.108403

Andry-zo Randrianantoandro , Mehdi Rahmani , Aymen Selmi , Rabesiranana Naivo , Abdelaziz Meftah

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引用次数: 0

Abstract

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.

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基于从马达加斯加钛铁矿中提取的大孔硅和氧化钛的肖特基二极管的电性能

本文介绍了基于Ag/TiO2/大孔硅（MPS）的肖特基二极管的合成和电学表征，其中二氧化钛是从马达加斯加钛铁矿中提取的。MPS结构采用银辅助化学蚀刻方法制备，并通过在酸基溶液中浸泡不同时间沉积TiO2。通过FTIR、拉曼光谱和XRD的结构分析证实了TiO2在MPS表面的成功沉积，揭示了二氧化钛的锐钛矿、金红石和板岩相共存。电性能通过测量电流-电压（I-V）和电容-电压（C-V）来评估。二极管的特性如理想因数、串联电阻和势垒高度与浸泡时间密切相关。最佳二极管的行为，包括增强整流和减少串联电阻，被观察到浸泡时间在5和15分钟之间。频率相关的C-V和电导-电压（G-V）测量显示了显著的界面效应和电荷捕获现象。这些发现突出了二氧化钛修饰MPS结构在先进电子和光电子应用方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY

CiteScore

8.70

自引率

9.40%

发文量

754

审稿时长

50 days

期刊介绍： Results in Physics is an open access journal offering authors the opportunity to publish in all fundamental and interdisciplinary areas of physics, materials science, and applied physics. Papers of a theoretical, computational, and experimental nature are all welcome. Results in Physics accepts papers that are scientifically sound, technically correct and provide valuable new knowledge to the physics community. Topics such as three-dimensional flow and magnetohydrodynamics are not within the scope of Results in Physics. Results in Physics welcomes three types of papers: 1. Full research papers 2. Microarticles: very short papers, no longer than two pages. They may consist of a single, but well-described piece of information, such as: - Data and/or a plot plus a description - Description of a new method or instrumentation - Negative results - Concept or design study 3. Letters to the Editor: Letters discussing a recent article published in Results in Physics are welcome. These are objective, constructive, or educational critiques of papers published in Results in Physics. Accepted letters will be sent to the author of the original paper for a response. Each letter and response is published together. Letters should be received within 8 weeks of the article''s publication. They should not exceed 750 words of text and 10 references.