Defect-Mediated Electron–Hole Separation in One-Unit-Cell ZnIn 2 S 4  Layers for Boosted Solar-Driven CO 2  Reduction

Jiao, Xingchen; Chen, Zongwei; Li, Xiaodong; Sun, Yongfu; Gao, Shan; Yan, Wensheng; Wang, Chengming; Zhang, Qun; Lin, Yue; Luo, Yi; Xie, Yi

doi:10.1021/jacs.7b02290

articleJournal of the American Chemical SocietyMay 17, 2017Closed access

Defect-Mediated Electron–Hole Separation in One-Unit-Cell ZnIn 2 S 4 Layers for Boosted Solar-Driven CO 2 Reduction

XJXingchen Jiao ZCZongwei Chen XLXiaodong Li YSYongfu Sun SGShan Gao

University of Science and Technology of China

PubMed

Indexed incrossrefpubmed

Abstract

The effect of defects on electron–hole separation is not always clear and is sometimes contradictory. Herein, we initially built clear models of two-dimensional atomic layers with tunable defect concentrations, and hence directly disclose the defect type and distribution at atomic level. As a prototype, defective one-unit-cell ZnIn2S4 atomic layers are successfully synthesized for the first time. Aberration-corrected scanning transmission electron microscopy directly manifests their distinct zinc vacancy concentrations, confirmed by positron annihilation spectrometry and electron spin resonance analysis. Density-functional calculations reveal that the presence of zinc vacancies ensures higher charge density…

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FWCI: 23.91
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References: 45

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Topics & keywords

Topics

Keywords

Chemistry
Vacancy defect
Spectroscopy
Zinc
Analytical Chemistry (journal)
Solar cell
Electron paramagnetic resonance
Band gap

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