High-sensitivity UV photodetector based on ZnO nanowires decorated with Au and ZnAl2O4 nanoparticles

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Ceramics International Pub Date : 2025-03-01 DOI:10.1016/j.ceramint.2024.12.359

Wei-Hsiang Liao , Yi-Chang Yeh , Yen-Liang Pan , Cheng-Liang Hsu

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Abstract

High-density and orderly aligned ZnO nanowires (NWs) were successfully synthesized on an Al doped ZnO (AZO) seed-layer-coated glass substrate using a hydrothermal method, with ZnAl₂O₄ nanoparticles (NPs) subsequently attached to the ZnO NWs via the sol-gel method. Under UV illumination, the ZnAl₂O₄ NPs/ZnO NWs heterostructure exhibited a remarkable photoresponse factor of approximately 18,000, about 30 times greater than that of pure ZnO NWs. Furthermore, Au nanoparticles (NPs) were sputtered onto the ZnAl₂O₄ NPs/ZnO NWs structure, where the localized surface plasmon resonance (LSPR) effect of the Au NPs significantly increased the generation of photogenerated electron-hole pairs, markedly enhancing the structure's conductivity. This enhancement resulted in a photoresponse factor of 93,825, approximately 150 times that of pure ZnO NWs. These findings confirm the exceptional UV sensitivity of the Au NPs/ZnAl₂O₄ NPs/ZnO NWs structure, highlighting its potential for applications in high-sensitivity UV photodetectors.

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基于Au和ZnAl2O4纳米粒子修饰ZnO纳米线的高灵敏度紫外光电探测器

采用水热法在Al掺杂ZnO （AZO）种子层包覆玻璃衬底上成功合成了高密度有序排列的ZnO纳米线（NWs），并通过溶胶-凝胶法将ZnAl2O4纳米粒子（NPs）附着在ZnO纳米线上。在紫外光照射下，ZnAl2O4 NPs/ZnO NWs异质结构的光响应因子约为18000，是纯ZnO NWs的30倍。此外，将Au纳米粒子溅射到ZnAl2O4 NPs/ZnO NWs结构上，Au纳米粒子的局部表面等离子体共振（LSPR）效应显著增加了光生电子-空穴对的产生，显著提高了结构的导电性。这种增强导致光响应因子为93,825，大约是纯ZnO NWs的150倍。这些发现证实了Au NPs/ZnAl2O4 NPs/ZnO NWs结构具有优异的紫外灵敏度，突出了其在高灵敏度紫外光电探测器中的应用潜力。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.