Yibei Xue , Lei Miao , Peng Song , Takuya Hasegawa , Ayahisa Okawa , Ryo Maezono , Tohru Sekino , Shu Yin
{"title":"Unveiling the NIR modulation performance enhancement of VO2 endowed by oxygen vacancy elimination","authors":"Yibei Xue , Lei Miao , Peng Song , Takuya Hasegawa , Ayahisa Okawa , Ryo Maezono , Tohru Sekino , Shu Yin","doi":"10.1016/j.solmat.2024.113007","DOIUrl":null,"url":null,"abstract":"<div><p>Vanadium dioxide has emerged as a promising material for smart windows owing to the temperature-responsive variable near-infrared (NIR) transmittance. Yet, the poor NIR modulation ability challenges its efficiency in thermal management. In this study, by meticulously controlling the oxygen vacancy content at a low level, VO<sub>2</sub> nanoparticles with excellent NIR modulation performance are achieved. Oxygen vacancy (V<sub>O</sub>) defects elimination leads to a remarkable decrease of reflectance in the monoclinic (M) phase, dramatically enhancing the near-infrared contrast of VO<sub>2</sub> by 154 %. Density functional theory (DFT) calculations reveal that V<sub>O</sub> elimination favors low refractive index in the NIR region. The optimized experiment is carried out to prepare VO<sub>2</sub> nanoparticles with low defects and high crystallinity. It shows the best NIR transmittance contrast at 1500 nm (<em>ΔT</em><sub><em>1500 nm</em></sub>) of 24.4 %, simultaneously keeping a high luminous transmittance (<em>T</em><sub><em>lum</em></sub>) of 79.7 %. This study is believed to provide valuable guidance for the current defect and thermochromic performance study of VO<sub>2</sub>.</p></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":null,"pages":null},"PeriodicalIF":6.3000,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0927024824003192/pdfft?md5=fe7c9a1314db7df9fe663756d2feec39&pid=1-s2.0-S0927024824003192-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solar Energy Materials and Solar Cells","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0927024824003192","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
Vanadium dioxide has emerged as a promising material for smart windows owing to the temperature-responsive variable near-infrared (NIR) transmittance. Yet, the poor NIR modulation ability challenges its efficiency in thermal management. In this study, by meticulously controlling the oxygen vacancy content at a low level, VO2 nanoparticles with excellent NIR modulation performance are achieved. Oxygen vacancy (VO) defects elimination leads to a remarkable decrease of reflectance in the monoclinic (M) phase, dramatically enhancing the near-infrared contrast of VO2 by 154 %. Density functional theory (DFT) calculations reveal that VO elimination favors low refractive index in the NIR region. The optimized experiment is carried out to prepare VO2 nanoparticles with low defects and high crystallinity. It shows the best NIR transmittance contrast at 1500 nm (ΔT1500 nm) of 24.4 %, simultaneously keeping a high luminous transmittance (Tlum) of 79.7 %. This study is believed to provide valuable guidance for the current defect and thermochromic performance study of VO2.
期刊介绍:
Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.