Electrical and photo-sensing properties of n-ZnO/p-Si(111) heterojunction and persistent conductivity

IF 2.4 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER Solid State Communications Pub Date : 2025-02-04 DOI:10.1016/j.ssc.2025.115862

K.J. Abhishek, Umananda M. Bhatta

引用次数: 0

Abstract

Zinc thin films were first deposited on Si(111) substrate using DC Magnetron sputtering followed by oxidation at 800 °C to obtain n-ZnO/p-si(111) heterojunction. Formation of ZnO thin film on top of Si(111) substrate was confirmed by X-ray Diffraction. Current-Voltage (IV) characteristics taken in the dark indicated the formation of a p-n junction. Transient photo-conductivity and switching property of the heterojunction was tested for various incident radiations such as infrared (IR), Ultraviolet-A (UVA) and green radiations in the reverse bias condition. The heterojunction showed a good photo-response, especially for UV and IR radiation (sensitivity of 13.96 and 14.3 respectively). On switching off the radiation, persistent conductivity was observed, especially in the case of UV radiation.

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n-ZnO/p-Si（111）异质结的电学和光敏特性及持续电导率

首先采用直流磁控溅射技术在Si（111）衬底上沉积锌薄膜，然后在800℃下氧化得到n-ZnO/p-si（111）异质结。通过x射线衍射证实了ZnO薄膜在Si（111）衬底上的形成。在黑暗中测量的电流-电压（IV）特性表明形成了pn结。在反向偏置条件下，测试了异质结在红外（IR）、紫外- a （UVA）和绿色辐射等不同入射辐射下的瞬态光导率和开关性能。该异质结具有良好的光响应，特别是对紫外和红外辐射的灵敏度分别为13.96和14.3。在关闭辐射后，观察到持续的电导率，特别是在紫外线辐射的情况下。

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来源期刊

Solid State Communications 物理-物理：凝聚态物理

CiteScore

3.40

自引率

4.80%

发文量

287

审稿时长

51 days

期刊介绍： Solid State Communications is an international medium for the publication of short communications and original research articles on significant developments in condensed matter science, giving scientists immediate access to important, recently completed work. The journal publishes original experimental and theoretical research on the physical and chemical properties of solids and other condensed systems and also on their preparation. The submission of manuscripts reporting research on the basic physics of materials science and devices, as well as of state-of-the-art microstructures and nanostructures, is encouraged. A coherent quantitative treatment emphasizing new physics is expected rather than a simple accumulation of experimental data. Consistent with these aims, the short communications should be kept concise and short, usually not longer than six printed pages. The number of figures and tables should also be kept to a minimum. Solid State Communications now also welcomes original research articles without length restrictions. The Fast-Track section of Solid State Communications is the venue for very rapid publication of short communications on significant developments in condensed matter science. The goal is to offer the broad condensed matter community quick and immediate access to publish recently completed papers in research areas that are rapidly evolving and in which there are developments with great potential impact.