教師資料查詢 | 類別: 期刊論文 | 教師: 薛宏中HSUEH, HUNG-CHUNG (瀏覽個人網頁)

標題:Bandgap Shrinkage and Charge Transfer in 2D Layered SnS2 Doped with V for Photocatalytic Efficiency Improvement
學年110
學期1
出版(發表)日期2021/11/20
作品名稱Bandgap Shrinkage and Charge Transfer in 2D Layered SnS2 Doped with V for Photocatalytic Efficiency Improvement
作品名稱(其他語言)
著者Abhijeet R. Shelke; Hsiao-Tsu Wang; Jau-Wern Chiou; Indrajit Shown; Amr Sabbah; Kuang-Hung Chen; Shu-Ang Teng; I-An Lin; Chi-Cheng Lee; Hung-Chung Hsueh; Yu-Hui Liang; Chao-Hung Du; Priyanka L. Yadav; Sekhar C. Ray; Shang-Hsien Hsieh; Chih-Wen Pao; Huang-Ming Tsai; Chia-Hao Chen; Kuei-Hsien Chen; Li-Chyong Chen; Way-Faung Pong
單位
出版者
著錄名稱、卷期、頁數Small 18(2), 2105076
摘要Effects of electronic and atomic structures of V-doped 2D layered SnS2 are studied using X-ray spectroscopy for the development of photocatalytic/photovoltaic applications. Extended X-ray absorption fine structure measurements at V K-edge reveal the presence of VO and VS bonds which form the intercalation of tetrahedral OVS sites in the van der Waals (vdW) gap of SnS2 layers. X-ray absorption near-edge structure (XANES) reveals not only valence state of V dopant in SnS2 is ≈4+ but also the charge transfer (CT) from V to ligands, supported by V Lα,β resonant inelastic X-ray scattering. These results suggest V doping produces extra interlayer covalent interactions and additional conducting channels, which increase the electronic conductivity and CT. This gives rapid transport of photo-excited electrons and effective carrier separation in layered SnS2. Additionally, valence-band photoemission spectra and S K-edge XANES indicate that the density of states near/at valence-band maximum is shifted to lower binding energy in V-doped SnS2 compare to pristine SnS2 and exhibits band gap shrinkage. These findings support first-principles density functional theory calculations of the interstitially tetrahedral OVS site intercalated in the vdW gap, highlighting the CT from V to ligands in V-doped SnS2.
關鍵字
語言英文(美國)
ISSN1613-6829
期刊性質國外
收錄於SCI;
產學合作
通訊作者Hung-Chung Hsueh(薛宏中), Jau-Wern Chiou, Way-Faung Pong
審稿制度
國別德國
公開徵稿
出版型式,電子版,紙本
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