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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yanfa Yan Walsh, A. Da Silva, J.L.F. Su-Huai Wei Al-Jassim, M. |
| Copyright Year | 2009 |
| Description | Author affiliation: National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, CO 80401, USA (Yanfa Yan; Walsh, A.; Da Silva, J.L.F.; Su-Huai Wei; Al-Jassim, M.) |
| Abstract | We studied the structural, electronic, and optical properties of the In system by a combination of high-resolution electron microscopy, image simulation, and density-functional theory calculation. We found that the In system has a polytypoid structure that consists of wurtzite InZn slabs separated by single In-O octahedral layers. These octahedral layers are inversion domain boundaries and satisfy the electronic octet rule. The InZn slabs contain another type of boundary that inverts the polarities again. This boundary prefers a zigzag modulated structure and also obeys the electronic octet rule. We also found that the red-shift in optical transitions for the In system as compared to individual In and ZnO systems is because the symmetry-forbidden band-edge transitions in In are overcome by the formation of superlattices, with ZnO contributions to the top of the valence band. We further found that increasing n results in an enhanced valence-band maximum in the ZnO region, while the conduction-band minimum becomes more localized on the InO layers, which introduces confinement to electron carriers. Such enhanced localization explains why Zn-rich compounds (higher n) exhibit lower conductivity. |
| Starting Page | 000172 |
| Ending Page | 000174 |
| File Size | 1067417 |
| Page Count | 3 |
| File Format | |
| ISBN | 9781424429493 |
| ISSN | 01608371 |
| DOI | 10.1109/PVSC.2009.5411702 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-06-07 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Zinc oxide Optical superlattices Electron optics Optical microscopy Slabs Electron microscopy Optical modulation Carrier confinement Charge carrier processes Conductivity |
| Content Type | Text |
| Resource Type | Article |
| Subject | Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering |
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