Cu-doped CdTe nanoparticles synthesized by colloidal approach for optoelectronic and photodetector application

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-04-10 DOI:10.1016/j.materresbull.2025.113486

S. Supriya, S. Das, A. Parida, R. Naik

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Abstract

This study reports the successful synthesis of Cu-doped CdTe nanoparticles using a colloidal synthesis method by varying Cu concentrations. X-ray diffraction characterization confirmed the CdTe hexagonal phase, with detectable phase shifts attributed to Cu incorporation. Raman spectroscopy provided valuable insights into the vibrational modes of CdTe, while transmission electron microscopy further validated the CdTe phase and revealed interplanar spacing values. Morphological analysis using field emission scanning electron microscopy indicated a consistent nanoparticle-like morphology. X-ray photoelectron spectroscopy offered a detailed understanding of the surface composition and electronic structure, confirming the presence of all constituent elements. UV–Vis spectroscopy demonstrated a reduction in the bandgap in the range 4.23–4.43 eV with increased Cu content, signifying alterations in the optical properties of the material. Observing 12.96 nAW^-1 photoresponsivity and 2.745 × 10⁵ Jones detectivity is suitable for a better photodetector. The analysis revealed an enhanced current response and notable changes in the rise and decay times of the material under illumination. These findings emphasize the enhanced properties and applicability of Cu-doped CdTe nanoparticles, highlighting their potential photodetector and optoelectronic applications.

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胶体法制备cu掺杂CdTe纳米粒子用于光电和光电探测器

本研究报告采用胶体合成法，通过改变铜的浓度，成功合成了掺铜碲化镉纳米粒子。X 射线衍射表征证实了碲化镉的六方相，可检测到的相移归因于铜的掺入。拉曼光谱提供了有关碲化镉振动模式的宝贵见解，而透射电子显微镜则进一步验证了碲化镉相，并揭示了平面间距值。利用场发射扫描电子显微镜进行的形态分析表明，碲化镉具有一致的纳米颗粒状形态。X 射线光电子能谱详细了解了表面成分和电子结构，确认了所有组成元素的存在。紫外可见光谱显示，随着铜含量的增加，带隙在 4.23-4.43 eV 范围内减小，这表明材料的光学特性发生了变化。观察到的 12.96 nAW-1 光致发光率和 2.745 × 105 Jones 检测率适用于更好的光电探测器。分析表明，该材料在光照下的电流响应增强，上升和衰减时间也发生了显著变化。这些发现强调了铜掺杂碲化镉纳米粒子的增强特性和适用性，突出了其潜在的光电探测器和光电应用。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.