期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 9, 页码 4516-4524出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta11071a
关键词
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资金
- Guangdong Natural Science Funds for Distinguished Young Scholars [2015A030306044]
- National Natural Science Foundation of China [51776094, 51406075]
- Guangdong-Hong Kong Joint Innovation Project [2016A050503012]
- National Key Research and Development Project from the Ministry of Science and Technology [2016YFA0202400, 2016YFA0202404]
- Peacock Team Project from the Shenzhen Science and Technology Innovation Committee [KQTD2015033110182370]
- Training Program for Outstanding Young Teachers at Higher Education Institutions of Guangdong Province [YQ2015151]
- China Postdoctoral Science Foundation [2018M642892]
- Southern University of Science and Technology
Vanadium dioxide (VO2) is emerging as the most promising candidate for next-generation smart windows. However, the applications of VO2-based films encounter the bottleneck of its optimal thermochromic property being unable to be retained as the modulating phase transition temperature approaches the ambient temperature. Joule heating is an effective approach to maintain the infrared switching ability of pristine VO2 films, but the accompanied energy consumption and its effects on the infrared switching ability of flexible VO2 films are still unexplored. Here, we fabricated flexible VO2 nanoparticle films via a scalable blade-coating process and investigated the effects of Joule heating on the infrared switching of flexible VO2 films. Infrared switching triggered by Joule heating can be effectively managed by the input voltages with high stability and exhibited no obvious degradation even after 10000 bending cycles, suggesting excellent flexibility. Importantly, we found that maximum infrared switching ability could be sustained with a dramatically reduced power, 15% of the threshold power (224 mW cm(-2)), by utilizing the hysteresis behaviour of the as-prepared VO2 films. This study provides a practical strategy for utilizing hysteresis behaviour to maintain the optimal infrared switching ability of flexible VO2 films with low energy consumption, substantially promoting the development of flexible smart devices.
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