BiVO4 Polaron-Hopping State-Induced Low-Bias Spintronic Water Splitting Device

IF 5.2 3区 工程技术 Q2 ENERGY & FUELS
Yi-Sheng Lai*, Hung-Yu Shen and Cheng-Ju Yang, 
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引用次数: 0

Abstract

Both n-type and p-type BiVO4 photoelectrodes demonstrate a high performance in water splitting devices, with an ultrahigh solar to hydrogen energy conversion performance as high as 6.77 and 7.51%, respectively. The external quantum efficiencies of the n-type and p-type BiVO4 photoelectrodes under 520 nm laser irradiation are 54.52 and 48.38%, respectively. Besides, over 49 L of hydrogen gases evolved from the n-type BiVO4 photoelectrode and over 32 L of hydrogen gases from the p-type BiVO4 photoelectrode. With the polaron surface state and the polaron-hopping energy level, the p-type BiVO4 demonstrated over 50% spin polarization rate since ℏ/–ℏ angular momentum-modulated circular polarization serves as the spintronic excitation light source. The hole-trapping Fermi level of the p-type BiVO4 affords the water splitting devices a shorter path for hole transportation than the n-type BiVO4.

Abstract Image

BiVO4极化子跳态诱导低偏置自旋电子水分裂装置
n型和p型BiVO4光电极在水分解装置中都表现出了很高的性能,其太阳能到氢能的转换性能分别高达6.77%和7.51%。在520 nm激光照射下,n型和p型BiVO4光电极的外量子效率分别为54.52和48.38%。此外,n型BiVO4光电极产生的氢气超过49 L, p型BiVO4光电极产生的氢气超过32 L。在极化子表面态和极化子跳变能级下,由于以角动量调制的圆偏振作为自旋电子激发光源,p型BiVO4的自旋极化率超过50%。p型BiVO4的空穴捕获费米能级使水分裂器件的空穴输运路径比n型BiVO4短。
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来源期刊
Energy & Fuels
Energy & Fuels 工程技术-工程:化工
CiteScore
9.20
自引率
13.20%
发文量
1101
审稿时长
2.1 months
期刊介绍: Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.
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