{"title":"One-step synthesis of needle-like lanthanum-doped TiO2 nanomaterials and their photoconductivity activity in air medium","authors":"Rajkumar C , Arunachalam Arulraj","doi":"10.1016/j.matlet.2024.137733","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, lanthanum-doped titanium dioxide (La-doped TiO<sub>2</sub>) was synthesized and characterized for the photoconductivity study in an air medium. TiO<sub>2</sub> is well-known semiconductor with excellent optical and electrical properties, making it ideal candidate for optoelectronics applications. However, the incorporation of rare-earth element like La can significantly alter its performance, particularly under light exposure. Further, in this study, the effect of annealing was also carried out. The photosensitivity of La-doped TiO<sub>2</sub> sample annealed at 600 °C shows better photosensitivity as compared to other samples. This enhancement is attributed to the increased carrier concentration and reduced recombination rates of photo-generated electron-hole pairs due to doping of lanthanum. These findings suggest that La-doped TiO<sub>2</sub> holds potential for applications in photodetectors, UV sensors, and other optoelectronic devices operating in ambient conditions.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"380 ","pages":"Article 137733"},"PeriodicalIF":2.7000,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Letters","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167577X24018731","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, lanthanum-doped titanium dioxide (La-doped TiO2) was synthesized and characterized for the photoconductivity study in an air medium. TiO2 is well-known semiconductor with excellent optical and electrical properties, making it ideal candidate for optoelectronics applications. However, the incorporation of rare-earth element like La can significantly alter its performance, particularly under light exposure. Further, in this study, the effect of annealing was also carried out. The photosensitivity of La-doped TiO2 sample annealed at 600 °C shows better photosensitivity as compared to other samples. This enhancement is attributed to the increased carrier concentration and reduced recombination rates of photo-generated electron-hole pairs due to doping of lanthanum. These findings suggest that La-doped TiO2 holds potential for applications in photodetectors, UV sensors, and other optoelectronic devices operating in ambient conditions.
本研究合成了掺杂镧的二氧化钛（La-doped TiO2），并对其在空气介质中的光电导性进行了表征。二氧化钛是著名的半导体，具有优异的光学和电学特性，是光电子应用的理想候选材料。然而，稀土元素（如镧）的加入会显著改变其性能，尤其是在光照条件下。此外，本研究还对退火的影响进行了研究。与其他样品相比，在 600 °C 下退火的掺 La TiO2 样品的光敏性更好。这种增强归因于镧的掺入提高了载流子浓度，降低了光生电子-空穴对的重组率。这些发现表明，掺杂镧的二氧化钛具有应用于光电探测器、紫外线传感器和其他在环境条件下工作的光电设备的潜力。
期刊介绍：
Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review.
Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials.
Contributions include, but are not limited to, a variety of topics such as:
• Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors
• Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart
• Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction
• Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots.
• Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing.
• Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic
• Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive
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