Directional charge transportation and Rayleigh scattering for the optimal in-band quantum yield of a composite semiconductor nano-photocatalyst

Wang，Xiaoyi1,2; Hu，Wenyu1; Qiu，Yang3; Huang，Yi1; Wang，Xueqing4; Xu，Min1; Ma，Jian1; Miao，Feng1; Cui，Xudong5; Jin，Chaoyuan2,6; Ruterana，Pierre7

2021-06-07

10.1039/d0cy02316g

Catalysis Science & Technology   影响因子和分区

2044-4753

2044-4761

In this work, we propose a novel technique based on wavelength dispersivein situfluorescence spectroscopy (WDIFS) for diagnosing the wavelength-dependent directional charge transportation and Rayleigh scattering enhanced in-band quantum yield. For the first time, it is clearly demonstrated that the formation of the 2D electron gas in CuO/ZnO and upward Schottky barriers in ZnO/Ag facilitate the photocatalytic performance in the ultraviolet spectral range, and that utilization of the visible spectrum relies on the band alignment between the energy level of the dopants and the Fermi level of Ag. Moreover, it is shown that the wavelength-dependent in-band quantum yield can be controlled through particle size photon scattering, in which the strong Rayleigh scattering based photon harvesting brings about a significant increase in the photocatalytic performance in the ultraviolet spectrum. Eventually, it is forecast that systematic use of the proposed technique for a systematic diagnosis should help towards the production of efficient ZnO-based photocatalysts.

SCI ; EI

英语

其他

WOS:000642579000001

20212410512307

Copper oxides ; Electron gas ; II-VI semiconductors ; Oxide minerals ; Particle size ; Photons ; Quantum yield ; Schottky barrier diodes ; Ultraviolet spectroscopy ; Wide band gap semiconductors ; Zinc oxide

Minerals:482.2 ; Electromagnetic Waves:711 ; Semiconductor Devices and Integrated Circuits:714.2 ; Physical Chemistry:801.4 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3

2-s2.0-85107869568

Scopus

1.Key Laboratory of Electronic and Information Engineering,State Ethnic Affairs Commission,Southwest Minzu University,Chengdu,610041,China
2.Institute of Microelectronics and Nanoelectronics,College of Information Science and Electronic Engineering,Zhejiang University,Hangzhou,310007,China
3.Materials Characterization and Preparation Center and Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
4.Leshan Normal University,Leshan,614000,China
5.Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang,621900,China
6.Zhejiang Laboratory,Hangzhou,311121,China
7.CIMAP,UMR 6252,CNRS-ENSICAEN-CEA-UCBN,Caen,14050,France

Wang，Xiaoyi,Hu，Wenyu,Qiu，Yang,et al. Directional charge transportation and Rayleigh scattering for the optimal in-band quantum yield of a composite semiconductor nano-photocatalyst[J]. Catalysis Science & Technology,2021,11(11):3855-3864.

Wang，Xiaoyi.,Hu，Wenyu.,Qiu，Yang.,Huang，Yi.,Wang，Xueqing.,...&Ruterana，Pierre.(2021).Directional charge transportation and Rayleigh scattering for the optimal in-band quantum yield of a composite semiconductor nano-photocatalyst.Catalysis Science & Technology,11(11),3855-3864.

Wang，Xiaoyi,et al."Directional charge transportation and Rayleigh scattering for the optimal in-band quantum yield of a composite semiconductor nano-photocatalyst".Catalysis Science & Technology 11.11(2021):3855-3864.