教師資料查詢 | 類別: 期刊論文 | 教師: 杜昭宏CHAO-HUNG DU (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2022/01/13
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A. R. Shelke; H. T. Wang; J. W. Chiou; K. H. Chen; S. A. Teng; I. A. Lin; C. C. Lee; H. C. Hsueh; Y. H. Liang; C. H. Du; P. L. Yadav; S. C. Ray; S. H. Hsieh; C.W. Pao; H. M. Tsai; I. Shown; A. Sabbah; K. H. Chen; L. C. Chen; W. F. 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band-gap shrinkage;charge transfer;density functional theory;resonant inelastic X-ray scattering;V-doped 2D layered SnS 2;X-ray absorption
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W. F. Pong
審稿制度
國別德國
公開徵稿
出版型式,電子版,紙本
相關連結
SDGs
Google+ 推薦功能,讓全世界都能看到您的推薦!