Nonlinear transport in carbon quantum dot electronic devices: Experiment and theory

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-06-09 DOI:10.1063/5.0263294

Scott Copeland, Sungguen Ryu, Kazunari Imai, Nicholas Krasco, Zhixiang Lu, David Sánchez, Paul Czubarow

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引用次数: 0

Abstract

Carbon quantum dots (CQDs) are a promising material for electronic applications due to their easy fabrication and interesting semiconductor properties. Further, CQDs exhibit quantum confinement and charging effects, which may lead not only to improved performances but also to devices with novel functionalities. Here, we investigate the electronic transport of CQDs embedded on epoxy polymer. Our samples are coupled to interdigitated electrodes with individually addressable microelectrodes. Remarkably, the current–voltage characteristics show strongly nonlinear regimes at room temperature, ranging from Schottky diode to Coulomb blockade and even negative differential conductance (NDC) behavior. We propose a master equation theoretical framework which allows us to compute current curves that agree well with the observations. This model emphasizes the importance of interacting dots and electron traps in generating a cohesive picture that encompasses all transport regimes. Overall, our results suggest that CQDs constitute a versatile materials platform for 3D integrated electronic purposes.

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碳量子点电子器件的非线性输运：实验与理论

碳量子点（CQDs）由于其易于制造和有趣的半导体特性而成为一种很有前途的电子应用材料。此外，CQDs表现出量子约束和充电效应，不仅可以提高性能，还可以使器件具有新颖的功能。本文研究了环氧聚合物上CQDs的电子输运。我们的样品与可单独寻址的微电极耦合在一起。值得注意的是，在室温下，电流-电压特性表现出强烈的非线性，从肖特基二极管到库仑阻塞，甚至是负差分电导（NDC）行为。我们提出了一个主方程理论框架，使我们能够计算出与观测结果非常吻合的电流曲线。该模型强调了相互作用的点和电子陷阱在生成包含所有输运机制的内聚图中的重要性。总的来说，我们的研究结果表明，CQDs构成了一个用于3D集成电子目的的多功能材料平台。

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

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.