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Charge photogeneration in few-layer MoS2 (CROSBI ID 221014)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Borzda, Tetiana ; Gadermaier, Christoph ; Vujičić, Nataša ; Topolovšek, Peter ; Borovšak, Miloš ; Mertelj, Tomaž ; Viola, Daniele ; Manzoni, Cristian ; Pogna, Eva A. A. ; Brida, Daniele et al. Charge photogeneration in few-layer MoS2 // Advanced functional materials, 25 (2015), 3351-3358. doi: 10.1002/adfm.201500709

Podaci o odgovornosti

Borzda, Tetiana ; Gadermaier, Christoph ; Vujičić, Nataša ; Topolovšek, Peter ; Borovšak, Miloš ; Mertelj, Tomaž ; Viola, Daniele ; Manzoni, Cristian ; Pogna, Eva A. A. ; Brida, Daniele ; Antagnazza, Maria Rosa ; Scotognella, Francesco ; Lanzani, Guglielmo ; Cerullo, Giulio ; Mihailović, Dragan

engleski

Charge photogeneration in few-layer MoS2

The 2D semiconductor MoS2 in its mono- and few- layer form is expected to have a significant exciton binding energy of several 100 meV, suggesting excitons as the primary photoexcited species. Nevertheless, even single layers show a strong photovoltaic effect and work as the active material in high sensitivity photodetectors, thus indicating efficient charge carrier photogeneration. Here, modulation spectroscopy in the sub-ps and ms time scales is used to study the photoexcitation dynamics in few-layer MoS2. The results suggest that the primary photoexcitations are excitons that efficiently dissociate into charges with a characteristic time of 700 fs. Based on these findings, simple suggestions for the design of efficient MoS2 photovoltaic and photodetector devices are made.

charge generation; excitons; femtosecond spectroscopy; MoS2; transition metal dichalcogenides

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Podaci o izdanju

25

2015.

3351-3358

objavljeno

1616-301X

10.1002/adfm.201500709

Povezanost rada

Fizika

Poveznice
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