Direct Observation of Photon Induced Giant Band Renormalization in 2D PdSe2 Dichalcogenide by Transient Absorption Spectroscopy

Chen, HualongShenzhen Univ, Inst Microscale Optoelect, Shenzhen 518060, Peoples R China. (författare)

Insight into fundamental light-matter interaction as well as underlying photo-physical processes is crucial for the development of novel optoelectronic devices. Palladium diselenide (PdSe2), an important representative of emerging 2D noble metal dichalcogenides, has gain considerable attention owing to its unique optical, physical, and chemical properties. In this study, 2D PdSe2 nanosheets (NSs) are prepared using the liquid-phase exfoliation method. A broadband carrier relaxation dynamics from visible to near-infrared bands are revealed using a time-resolved transient absorption spectrometer, giving results that indicate band filling and bandgap renormalization (BGR) effects in the 2D PdSe2 NSs. The observed blue-shift of the transient absorption spectra at the primary stage and the subsequent red-shift can be ascribed to this BGR effect. These findings reveal the many-body character of the 2D TMDs material and may hold keys for applications in the field of optoelectronics and ultrafast photonics.

Kuklin, Artem V.Uppsala universitet,Kemisk och biomolekylär fysik(Swepub:uu)artku415 (författare)
Xiao, JingTaishan Univ, Coll Phys & Elect Engn, Tai An 271000, Peoples R China. (författare)
Al-Hartomy, Omar A.King Abdulaziz Univ, Fac Sci, Dept Phys, Jeddah 21589, Saudi Arabia. (författare)
Al-Ghamdi, AhmedKing Abdulaziz Univ, Fac Sci, Dept Phys, Jeddah 21589, Saudi Arabia. (författare)
Wageh, SwelmKing Abdulaziz Univ, Fac Sci, Dept Phys, Jeddah 21589, Saudi Arabia. (författare)
Zhang, YuleShenzhen Univ, Inst Microscale Optoelect, Shenzhen 518060, Peoples R China. (författare)
Ågren, HansUppsala universitet,Kemisk och biomolekylär fysik(Swepub:uu)hanag788 (författare)
Gao, LingfengHangzhou Normal Univ, Coll Mat Chem & Chem Engn, Key Lab Organosilicon Chem & Mat Technol, Key Lab Organosilicon Mat Technol,Minist Educ, Hangzhou 311121, Peoples R China. (författare)
Zhang, HanShenzhen Univ, Inst Microscale Optoelect, Shenzhen 518060, Peoples R China. (författare)
Shenzhen Univ, Inst Microscale Optoelect, Shenzhen 518060, Peoples R China.Kemisk och biomolekylär fysik (creator_code:org_t)

Av författaren/redakt...: Chen, Hualong; Kuklin, Artem V.; Xiao, Jing; Al-Hartomy, Omar ...; Al-Ghamdi, Ahmed; Wageh, Swelm; visa fler...; Zhang, Yule; Ågren, Hans; Gao, Lingfeng; Zhang, Han; visa färre...

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