Influence of nitrogen-doped carbon quantum dots on titanium dioxide for photovoltaic applications: optical and structural insight

作     者：Achem, Christopher U. Onimisi, Muhammad Y. Danladi, Eli David, Ikpaya Babatunde, Rabiu A. 

作者机构：Centre for Satellite Technology Development-NASRDA Abuja Nigeria Department of Physics Nigerian Defence Academy Kaduna Nigeria Department of Physics Federal University of Health Sciences Benue Otukpo Nigeria National Space Research & Development Agency Abuja Nigeria Centre for Atmospheric Research Kogi Anyingba Nigeria 

出 版 物：《Materials Research Innovations》 (Mater. Res. Innov.)

年 卷 期：2024年第28卷第2期

页      面：106-119页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：The authors are grateful to the Physics Advanced Laboratory  Sheda Science Technology Complex (SHESTCO) and Namiroch Research Laboratory  Abuja for the use of their equipment 

主　　题：Titanium dioxide 

摘      要：This study investigates the optical and structural properties of nitrogen-doped Carbon Quantum Dots (NCQDs) on Titanium dioxide (TiO2). We synthesized the NCQDs via direct pyrolysis using varying amount of nitrogen precursor. We used a UV-visible, Fluorescence and Fourier Transform Infrared spectrophotometer, X-ray diffractometer (XRD), and Scanning Electron Microscope (SEM) to probe the samples. The introduction of nitrogen enhanced the intrinsic activities and electron dynamics of the CQD films, leading to improved confinement, charge extraction, and light harvesting. The optical response of the NCQDs strongly hinged on the nitrogen doping content. Sensitizing different amounts of NCQDs on TiO2 surface reduced their bandgap energies. XRD analysis confirms the preservation of the TiO2 anatase phase nanoparticle after the introduction of NCQDs, with no substantial changes to the crystal lattice and phase purity of the resulting photoanodes, indicating the presence of NCQDs on the surface. However, the deposition of NCQDs decreased the crystallite size. SEM images show well-dispersed morphologies with non-clustered NCQDs films. NCQDs can serve as promising photosensitizers in photovoltaic devices. © 2023 Informa UK Limited, trading as Taylor & Francis Group.