TiO2-SnO2:F interfacial electronic structure investigated by soft x-ray absorption spectroscopy
學年 100
學期 2
出版（發表）日期 2012-03-01
作品名稱 TiO2-SnO2:F interfacial electronic structure investigated by soft x-ray absorption spectroscopy
作品名稱（其他語言）
著者 Kronawitter, Coleman X.; Kapilashrami, Mukes; Bakke, Jonathan R.; Bent, S.F.; Chuang, Cheng-hao; Pong, Way-faung; Guo, J. ;Vayssieres, L.; Mao, S.S.
單位 淡江大學物理學系
出版者 College Park: American Physical Society
著錄名稱、卷期、頁數 Physical Review B 85(12), pp.125109(7pages)
摘要 The electronic structure of the titanium dioxide (TiO2)-fluorine-doped tin dioxide (SnO2:F) interface is investigated by soft x-ray absorption spectroscopy using synchrotron radiation. The measurements probe the site- and symmetry-selected unoccupied density of states and reflect the interaction between an early transition-metal-oxide (d0) semiconductor and a post-transition-metal-oxide (d10) degenerate semiconductor. The distinct interfacial electronic structure of TiO2-SnO2:F is established by contrasting spectra with those for anatase and rutile TiO2, SnO2:F, and ZnO-SnO2:F and CdO-SnO2:F interfaces. Oxygen 1s absorption spectra, which relate to the O 2p partial density of states of the conduction band, indicate that the interface is associated with a reduction in Ti d-O p orbital hybridization and an alteration of the TiO2 crystal field. These observations are consistent with measured titanium 2p absorption spectra, which in addition provide evidence for distortion of long-range order around the cation site in the interfacial TiO2. The TiO2-SnO2:F interface is a functional component of a number of optoelectronic devices, perhaps most notably within the anode structure of solar cell architectures. In nonequilibrium conditions, such as those found in operating solar cells, interfacial electronic structure directly influences performance by modifying, for instance, the quasi-Fermi level electrons and the potential distribution at the transparent electrode.
關鍵字
語言 en_US
ISSN 1550-235X
期刊性質 國外
收錄於
產學合作
通訊作者
審稿制度 是
國別 USA
公開徵稿
出版型式 電子版
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