含有Ag和SiO2介电层的PS/ZnO复合材料的紫外和可见光发光增强

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-09-24 DOI:10.1016/j.optmat.2025.117552

Yongfeng Qu, Ziyang Liu, Jijun Ding, Haixia Chen, Boquan Ren

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引用次数: 0

摘要

氧化锌（ZnO）是一种具有优异光电性能的宽禁带半导体，但由于发光效率低和表面态相关问题，限制了其实际应用。在这项研究中，我们的目标是通过将Ag纳米结构和SiO2介电层结合到多孔硅（PS）基杂化结构中来增强ZnO的紫外和可见光发光性能。采用电化学刻蚀和磁控溅射法制备了PS/Ag/ZnO、PS/SiO2/ZnO和PS/Ag/SiO2/ZnO三种ZnO基异质结构。通过x射线衍射和扫描电镜对其结构进行表征，发现ZnO在PS表面的结晶度较低，具有多孔的岛状生长形貌。Ag和SiO2的掺入不仅改善了ZnO薄膜的附着力和均匀性，而且促进了ZnO薄膜沿特定晶体方向的定向生长。在这些异质结构中，PS/Ag/SiO2/ZnO结构的紫外发射增强了2.5倍，可见光发射增强了4倍，可见紫外强度比为15.38。这主要是由于银纳米粒子引起的局部表面等离子体共振和SiO2层内的光学干涉的协同作用，提高了光提取效率，抑制了非辐射复合。这项工作为高性能zno基发光器件提供了一种新的结构设计策略，在UV/可见光传感器、发射器和光催化剂方面具有潜在的应用前景。

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Enhanced UV and visible photoluminescence in PS/ZnO composites incorporating Ag and SiO2 dielectric layer

Zinc oxide (ZnO), a wide-bandgap semiconductor with excellent optoelectronic properties, suffers from low luminescence efficiency and surface-state-related issues, limiting its practical applications. In this study, we aim to enhance the ultraviolet (UV) and visible photoluminescence performance of ZnO by incorporating Ag nanostructures and a SiO₂ dielectric layer into a porous silicon (PS)-based hybrid structure. Three ZnO-based heterostructures, including PS/Ag/ZnO, PS/SiO₂/ZnO, and PS/Ag/SiO₂/ZnO, were fabricated using electrochemical etching and magnetron sputtering. The structural characterization through X-ray diffraction and scanning electron microscopy revealed that ZnO deposited on PS exhibited low crystallinity and porous island-like growth morphology. The incorporation of Ag and SiO₂ not only improved the adhesion and uniformity of ZnO films but also promoted oriented growth along specific crystallographic directions. Among these heterostructures, the PS/Ag/SiO₂/ZnO configuration demonstrated a 2.5-fold enhancement in UV emission and a 4-fold increase in visible emission, yielding a visible-to-UV intensity ratio of 15.38. These improvements were attributed to the synergistic effects of localized surface plasmon resonance induced by Ag nanoparticles and optical interference within the SiO₂ layer, which enhanced light extraction efficiency and suppressed non-radiative recombination. This work provides a novel structural design strategy for high-performance ZnO-based light-emitting devices, with potential applications in UV/visible sensors, emitters, and photocatalysts.

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.