Poole-Frenkel conduction in CdS single-layered and CdS/SnS2 heterojunction electrode system

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2024-10-02 DOI:10.1016/j.nanoso.2024.101359

Yowa Nanung , Lohnye Tangjang , Hirendra Das , P.K. Kalita

引用次数: 0

Abstract

In this communication, the prevalence of Poole-Frenkel conduction mechanism in two distinct semiconductor systems, CdS single-layered and CdS/SnS₂ heterojunction electrode systems, is reported. X-ray diffraction (XRD) exhibits the formation of CdS quantum dots (QDs). A High resolution transmission electron microscopy (HRTEM) shows a discrete particle distribution of SnS₂, tends to assemble into nanosheets. Poole-Frenkel conduction arises due to the trap distribution of CdS dots, modified by SnS₂ sheets. Furthermore, the formation of heterojunctions with SnS₂ shows promising enhancement in charge transport, characterized by reduced trap density and improved conductivity compared pristine CdS. The findings provide valuable insights into the fundamental charge transport processes in CdS/SnS₂ system and offer potential avenues for optimizing the performance of electronic devices.

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CdS 单层和 CdS/SnS2 异质结电极系统中的 Poole-Frenkel 传导

在这篇通讯中，报告了普尔-弗伦克尔传导机制在两种不同的半导体系统（CdS 单层和 CdS/SnS2 异质结电极系统）中的普遍存在。X 射线衍射 (XRD) 显示了 CdS 量子点 (QD) 的形成。高分辨率透射电子显微镜（HRTEM）显示 SnS2 呈离散颗粒分布，并趋向于组装成纳米片。普尔-弗伦克尔传导是由于被 SnS2 薄片修饰的 CdS 点的陷阱分布造成的。此外，与 SnS2 形成的异质结有望增强电荷传输，其特点是与原始 CdS 相比，阱密度降低，导电性提高。这些发现为了解 CdS/SnS2 系统的基本电荷传输过程提供了宝贵的见解，并为优化电子器件的性能提供了潜在的途径。

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

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .