Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 549, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2020.120337
Keywords
Pulsed radio frequency; Amorphous; Tungsten oxide; Electrochromism; Energy storage
Funding
- National Natural Science Foundation of China [51772072, 51701057]
- International Thermonuclear Experimental Reactor Special Project [JZ2016KJIT0819]
- Foundation for Tianchang Intelligent Equipments and Instruments Research Institute [JZ2017AHDS1147]
- Natural Science Foundation of Anhui Province [1708085ME100]
- Fundamental Research Funds for the Central Universities [PA2019GDQT0022, PA2019GDQT0015, 201710359015]
- Key Project of Changfeng-HFUT Industrial Innovation Guidance Funds [JZ2020YDZJ0122]
- 111 Project New Materials and Technology for Clean Energy [B18018]
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Compared to conventional direct current (DC) and radio frequency (RF) magnetron sputtering, the pulsed radio frequency (PRF) magnetron sputtering circumvents the obstacle of a self-annealing temperature effect during the deposition, which may induce irregular crystallization or uneven chemical composition. The porous homogeneous amorphous WO3 film prepared by the PRF magnetron sputtering shows large dual-band optical modulation in the visible and near infrared regions(93.6% in 633 nm and 90.6% in 1500 nm), short response time (3.2s for coloring and 5.6s for bleaching), decent coloration efficiency(56.8 cm( )(2)C(-1)) and superior cycling stability(the optical modulation is dropped by 4.3% after 2000 cycles). In addition, the PRF WO3 film also presents good energy-storage properties (44.0 mF/cm(2) areal capacitance), good capacitive cyclic stability without apparent capacitance loss after 2000 cycles and superior rate capability. The obtained bi-functional porous amorphous WO3 film may find great potential in constructing high efficiency electrochromic energy storage and other intelligent nanodevices.
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