A Novel and Functional Single-Layer Sheet of ZnSe | Zendy

Jia Zhou | Zendy; Bobby G. Sumpter | Zendy; Paul R. C. Kent | Zendy; Jingsong Huang | Zendy

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A Novel and Functional Single-Layer Sheet of ZnSe

Author(s) -

Jia Zhou,

Bobby G. Sumpter,

Paul R. C. Kent,

Jingsong Huang

Publication year - 2014

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/am505655m

Subject(s) - materials science , absorbance , layer (electronics) , atom (system on chip) , absorption (acoustics) , band gap , zinc , optoelectronics , wavelength , water splitting , nanotechnology , molecular physics , optics , composite material , physics , biochemistry , chemistry , photocatalysis , computer science , metallurgy , embedded system , catalysis

The recently synthesized freestanding four-atom-thick double-layer sheet of ZnSe holds great promise as an ultraflexible and transparent photoelectrode material for solar water splitting. In this work, we report theoretical studies on a novel three-atom-thick single-layer sheet of ZnSe that demonstrates a strong quantum confinement effect by exhibiting a large enhancement of the band gap (2.0 eV) relative to the zinc blende (ZB) bulk phase. Theoretical optical absorbance shows that the largest absorption of this ultrathin single-layer sheet of ZnSe occurs at a wavelength similar to its four-atom-thick double-layer counterpart, suggesting a comparable behavior on incident photon-to-current conversion efficiency for solar water splitting, among a wealth of potential applications. The results presented herein for ZnSe may be generalized to other group II-VI analogues.

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