Valence Band of Rutile TiO2(110) Investigated by Polarized-Light-Based Angle-Resolved Photoelectron Spectroscopy

Dong，Shanshan1,4; Xia，Shucai1,4; Wang，Chao2; Dong，Jingwei1; Wang，Tianjun1; Li，Rui2; Ren，Zefeng1; Dai，Dongxu1; Yang，Xueming1,3; Zhou，Chuanyao1

2022

10.1021/acs.jpclett.2c00142

Journal of Physical Chemistry Letters   影响因子和分区

1948-7185

1948-7185

Band structure dictates optical and electronic properties of solids and eventually the efficiency of the semiconductor based solar conversion. Compared to numerous theoretical calculations, the experimentally measured band structure of rutile TiO2, a prototypical photocatalytic material, is rare. In this work, the valence band structure of rutile TiO2(110) is measured by angle-resolved photoelectron spectroscopy using polarized extreme ultraviolet light. The effective mass of the hole, which has never been measured before, is determined to be 4.66-6.87 m0 (free electron mass) and anisotropic. The dependence of photoemission intensities on excitation light polarization is analyzed by taking into account of the parity symmetry of molecular orbitals in the blocking unit of rutile TiO2. This work reports a direct measurement of valence band structure and hole effective mass of rutile TiO2(110), which will deepen our understanding of the electronic structure and charge carrier properties of the model material and provide reference data for future theoretical calculations.

SCI ; EI

英语

NI论文

其他

National Natural Science Foundation of China[21973092,21688102] ; National Key Research and Development Program of China["2021YFA1500601","2018YFA0208703"]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical

WOS:000776518000005

AMER CHEMICAL SOC

20221211824006

Electronic properties ; Electronic structure ; Molecular orbitals ; Oxide minerals ; Photoelectron spectroscopy ; Photoelectrons ; Photons ; Titanium dioxide ; Valence bands

Minerals:482.2 ; Electromagnetic Waves:711 ; Physical Chemistry:801.4 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3

2-s2.0-85126636862

Scopus

1.State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy of Science,Dalian,457 Zhongshan Road, Liaoning,116023,China
2.School of Optoelectronic Engineering and Instrumentation Science,Dalian University of Technology,Dalian,Ganjingzi District, Liaoning,116024,China
3.Department of Chemistry,Southern University of Science and Technology,Shenzhen,1088 Xueyuan Road, Guangdong,518055,China
4.University of Chinese Academy of Sciences,Beijing,No. 19A Yuquan Road, Shijingshan District,100049,China

Dong，Shanshan,Xia，Shucai,Wang，Chao,et al. Valence Band of Rutile TiO2(110) Investigated by Polarized-Light-Based Angle-Resolved Photoelectron Spectroscopy[J]. Journal of Physical Chemistry Letters,2022,13(10):2299-2305.

Dong，Shanshan.,Xia，Shucai.,Wang，Chao.,Dong，Jingwei.,Wang，Tianjun.,...&Zhou，Chuanyao.(2022).Valence Band of Rutile TiO2(110) Investigated by Polarized-Light-Based Angle-Resolved Photoelectron Spectroscopy.Journal of Physical Chemistry Letters,13(10),2299-2305.

Dong，Shanshan,et al."Valence Band of Rutile TiO2(110) Investigated by Polarized-Light-Based Angle-Resolved Photoelectron Spectroscopy".Journal of Physical Chemistry Letters 13.10(2022):2299-2305.