Element-specific investigations of ultrafast dynamics in photoexcited Cu2ZnSnS4 nanoparticles in solution | Zendy

Christian Rein | Zendy; Jens Uhlig | Zendy; David CarrascoBusturia | Zendy; Khadijeh Khalili | Zendy; Anders S. Gertsen | Zendy; Asbjørn Moltke | Zendy; Xiaoyi Zhang | Zendy; Tetsuo Katayama | Zendy; J. M. GarcíaLastra | Zendy; M. Nielsen | Zendy; Shinichi Adachi | Zendy; Kristoffer Haldrup | Zendy; Jens Wenzel Andreasen | Zendy

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Element-specific investigations of ultrafast dynamics in photoexcited Cu2ZnSnS4 nanoparticles in solution

Author(s) -

Christian Rein,

Jens Uhlig,

David CarrascoBusturia,

Khadijeh Khalili,

Anders S. Gertsen,

Asbjørn Moltke,

Xiaoyi Zhang,

Tetsuo Katayama,

J. M. GarcíaLastra,

M. Nielsen,

Shinichi Adachi,

Kristoffer Haldrup,

Jens Wenzel Andreasen

Publication year - 2021

Publication title -

structural dynamics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.415

H-Index - 29

ISSN - 2329-7778

DOI - 10.1063/4.0000055

Subject(s) - czts , nanoparticle , ultrafast laser spectroscopy , spectroscopy , materials science , chemical physics , density functional theory , tin , absorption spectroscopy , ultrashort pulse , excited state , nanotechnology , optoelectronics , chemistry , laser , solar cell , computational chemistry , optics , atomic physics , physics , quantum mechanics , metallurgy

Ultrafast, light-induced dynamics in copper–zinc–tin–sulfide (CZTS) photovoltaic nanoparticles are investigated through a combination of optical and x-ray transient absorption spectroscopy. Laser-pump, x-ray-probe spectroscopy on a colloidal CZTS nanoparticle ink yields element-specificity, which reveals a rapid photo-induced shift of electron density away from Cu-sites, affecting the molecular orbital occupation and structure of CZTS. We observe the formation of a stable charge-separated and thermally excited structure, which persists for nanoseconds and involves an increased charge density at the Zn sites. Combined with density functional theory calculations, the results provide new insight into the structural and electronic dynamics of CZTS absorbers for solar cells.

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