.png){kind=icon}
Return
Surface state density decrease in nanostructured polycrystalline SnO2:: modelling and experimental evidence
.png){kind=icon}
PRE
AI
DOI：10.1016/j.snb.2003.12.056.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
We developed a model for n-type metal-oxide polycrystalline semiconductors which allows us to calculate the density of surface-chemisorbed oxygen and the band bending, once the Schottky barrier height is measured. From numerical simulation, we estimated for the polycrystalline SnO2 a depletion layer, A, of approximately 20 nm; consequently, we deposited films with a mean grain radius, R, larger (30 nm) than A, and smaller (10 nm). When R is smaller than A, the model predicts a flattening of the band bending, and a decrease in the density of chemisorbed oxygen that leads to the unpinning of the Fermi level. To give evidence of the predicted decrease in the density of surface states, we present and compare electrical measurements in dry air, as well as scanning tunnelling microscopy/spectroscopy results. (C) 2003 Elsevier B.V. All rights reserved.
Keywords:
Schottky barrier
surface states
scanning tunnelling spectroscopy
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
7.7
Papers:
3.4W
Citations:
12.6W
Organization
No organization information available
Cited Papers
The occurrence of Listeria monocytogenes in soft cheeses and raw milk and its resistance to heat
.png){kind=icon}
PREAI
ShareSave
ShareSaveShareSave
ShareSavePreparation and characterization of SnO2 and MoOx-SnO2 nanosized powders for thick film gas sensors
PREAI
ShareSaveShareSaveShareSave
View more