Extraordinary Polarization and Thickness Dependences of Photocarrier Dynamics in PdSe₂ Ribbons

Yang, Jin1,2; Xie, Jiafeng3,4; Jiang, Shaolong5; Zhang, Kai3,4; Li, Qi3,4; Wang, Yunfeng1; Wang, Tianwu3,4; Su, Fuhai1

2024-04-12

10.1021/acs.jpclett.4c00765

JOURNAL OF PHYSICAL CHEMISTRY LETTERS   影响因子和分区

1948-7185

Pentagonal palladium diselenide (PdSe2) stands out for its exceptional optoelectronic properties, including high carrier mobility, tunable bandgap, and anisotropic electronic and optical responses. Herein, we systematically investigate photocarrier dynamics in PdSe2 ribbons using polarization-resolved optical pump-probe spectroscopy. In thin PdSe2 ribbons with a semiconductor phase, the photocarrier dynamics are found to be dominated by intraband hot-carrier cooling, interband recombination, and the exciton effect, showing weak crystalline orientation dependences. Conversely, in thick semimetal-phase PdSe2 ribbons, the photocarrier relaxations governed by the electron-optical/acoustic phonon scattering strongly depend on the sample orientation, albeit with a degradation in in-plane anisotropy following hot-carrier cooling. Furthermore, we analyze the correlations between photocarrier dynamics and anisotropic energy dispersions of electronic structures across a wide range in k space, as well as the contributions from the anisotropic electron-phonon couplings. Our study provides crucial insights for developing polarization-sensitive photoelectronic devices based on PdSe2.

SCI ; EI

英语

其他

National Natural Science Foundation of China["61988102","12274424","12174398","12004387","51727806","51672279","11874361","12204484","12304223"] ; National Natural Science Foundation of China[2019B090917007] ; Key Research and Development Program of Guangdong Province[2019B090909011] ; Science and Technology Planning Project of Guangdong Province[CXJJ-19-B08] ; Innovation Program of Chinese Academy of Sciences[2021446] ; Youth Innovation Promotion Association of Chinese Academy of Sciences["2021YZGH03","YZJJKX202202"] ; HFIPS Director's Fund of Chinese Academy of Sciences["2021M703255","2023M741548"]

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

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

WOS:001203931100001

AMER CHEMICAL SOC

Web of Science

1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, HFIPS, Hefei 230031, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Chinese Acad Sci, GBA Branch Aerosp Informat Res Inst, Aerosp Informat Res Inst, Guangzhou 510700, Peoples R China
4.Guangdong Prov Key Lab Terahertz Quantum Electroma, Guangzhou 510700, Peoples R China
5.Quantum Sci Ctr Guangdong Hong Kong Macao Greater, Macao Greater Bay Area, Hong Kong 518045, Peoples R China

Yang, Jin,Xie, Jiafeng,Jiang, Shaolong,et al. Extraordinary Polarization and Thickness Dependences of Photocarrier Dynamics in PdSe₂ Ribbons[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2024,15(16).

Yang, Jin.,Xie, Jiafeng.,Jiang, Shaolong.,Zhang, Kai.,Li, Qi.,...&Su, Fuhai.(2024).Extraordinary Polarization and Thickness Dependences of Photocarrier Dynamics in PdSe₂ Ribbons.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,15(16).

Yang, Jin,et al."Extraordinary Polarization and Thickness Dependences of Photocarrier Dynamics in PdSe₂ Ribbons".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 15.16(2024).