基于W-VO2@AA核壳结构纳米颗粒的热致变色性能改进

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-05-09 DOI:10.1016/j.optmat.2025.117126

Jiran Liang , Chengye Zhang , Yong Yu , Yunfei Bai , Guixiang Yang , Dequan Zhang , Dangyuan Lei

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引用次数: 0

摘要

二氧化钒（VO2）因其热致金属到绝缘体的相变特性而成为热致变色智能窗的一个有前途的候选者。钨的掺杂使氧化钨（W-VO2）的相变温度降低到接近室温，但使其热致变色性能下降。提出了一种W-VO2@AA核壳结构，通过提高透光率和太阳调制来提高热致变色性能。利用表面分子配位效应，通过水热法制备了W-VO2@AA核壳结构，并用冰醋酸调节AA的壳层厚度。W-VO2@AA的相变温度为34.53℃。与W-VO2/PVP相比，W-VO2@AA/PVP复合薄膜智能窗的太阳调制率提高了80.2%（从5.65%提高到10.18%），透光率保持在70.52%。这种增强主要是由于AA的电子注入到W-VO2晶格中，从而增强了局部表面等离子体共振吸收性能。AA的折射率介于PVP和W-VO2之间，降低了其反射率。这项工作为克服W-VO2的两种热致变色性质之间的权衡关系提供了一种新的策略。

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Thermochromic performance improvement based on W-VO2@AA core-shell structure nanoparticles

Vanadium dioxide (VO₂) is a promising candidate for thermochromic smart windows for its thermally induced metal-to-insulator phase transition properties. Tungsten doping can reduce the phase transition temperature of VO₂ (W-VO₂) to near room temperature but deteriorates the thermochromic performance. A W-VO₂@AA core-shell structure was proposed to improve the thermochromic performance by enhancing the luminous transmittance and solar modulation, simultaneously. The W-VO₂@AA core-shell structure was prepared by the hydrothermal method based on the surface molecular coordination effect, and the shell thickness of AA was modulated by glacial acetic acid. The phase transition temperature of W-VO₂@AA is 34.53 °C. The solar modulation of the W-VO₂@AA/PVP composite film-based smart windows is increased by 80.2 % (from 5.65 % to 10.18 %) compared with W-VO₂/PVP, and the luminous transmittance is maintained satisfactorily at 70.52 %. This enhancement is primarily attributed to the injection of electrons from AA into the W-VO₂ lattice, which enhances the localized surface plasmon resonance absorption performance. Moreover, the refractive index of AA is between PVP and W-VO₂, which decreases the reflectance. This work provides a new strategy to overcome the trade-off relationship between the two thermochromic properties of W-VO₂.

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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.