Photo-thermal coupling effects on carrier transfer and barrier height in ZnO nanowires

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Thermal Sciences Pub Date : 2025-05-01 Epub Date: 2025-01-09 DOI:10.1016/j.ijthermalsci.2025.109688

MingKai Guo , GuoShuai Qin , Chunsheng Lu , MingHao Zhao , Lan Wu

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Abstract

Manipulating carrier redistribution in piezoelectric semiconductors via piezo- and thermo-photonic effects offering a promising approach for developing tunable optoelectronic devices. In this paper, we present a combined theoretical analysis and photoelectric bridge experiments to characterize and modulate electron transport in a single ZnO nanowire device with two identical electrodes by varying the intensity of ultraviolet light. Additionally, we have developed a comprehensive photo-thermal coupling model that integrates photoexcitation, photothermal and secondary pyroelectric (or thermal strain) effects. This model enables the extraction of carrier concentration and barrier height from the current-voltage curves through parameter inversion. Our findings provide deep insights into the electrical characteristics of nanodevices under bias control and open new avenues for the design of innovative electronic and optoelectronic nanodevices.

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光热耦合对ZnO纳米线载流子转移和势垒高度的影响

利用压电和热光子效应控制载流子在压电半导体中的再分布，为开发可调谐光电器件提供了一种有前途的方法。本文采用理论分析和光电电桥实验相结合的方法，通过改变紫外光强度来表征和调制具有两个相同电极的ZnO纳米线器件中的电子输运。此外，我们还开发了一个综合的光热耦合模型，该模型集成了光激发，光热和二次热释电（或热应变）效应。该模型可以通过参数反演从电流-电压曲线中提取载流子浓度和势垒高度。我们的发现为偏压控制下纳米器件的电学特性提供了深刻的见解，并为创新的电子和光电子纳米器件的设计开辟了新的途径。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.