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Photoluminescence study of ZnO nanotubes under hydrostatic pressure
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chen, Shijian Liu, Yi-Chun Shao, Changlu Xu, Chang-Shan Liu, Chin Yen Zhang, B. P. Wang, Leiran Liu, Bingguo Zou, Guang-Tian |
| Copyright Year | 2006 |
| Abstract | Photoluminescence of ZnO single crystal nanotubes grown on sapphire substrate by metal organic chemical vapor deposition has been studied as a function of applied hydrostatic pressure using the diamond-anvil-cell technique. The photoluminescence spectra of the ZnO nanotubes at atmospheric pressure are dominated by strong near-band-edge ΓFX and ΓBX excitonic emission lines accompanied by a weak broad deep-level (DL) emission band. The pressure-induced shifts of all observed emission lines are followed up to 15Gpa, when ZnO nanotubes undergo a phase transition from a direct-gap wurtzite structure to an indirect-gap rocksalt structure. The ΓFX emission is found to shift toward higher energy with applied pressure at a rate of 29.6meV∕GPa, which provides a method to measure the pressure coefficient of the direct Γ band gap in the wurtzite ZnO nanotubes. The ΓBX emission has a pressure coefficient of 21.6meV∕GPa, about 30% smaller than that of the ZnO band gap, which suggests that it might originate from the ra... |
| Starting Page | 133127 |
| Ending Page | 133127 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| DOI | 10.1063/1.2191884 |
| Volume Number | 88 |
| Alternate Webpage(s) | http://ir.ciomp.ac.cn/bitstream/181722/26706/1/Chen-2006-Photoluminescence%20st.pdf |
| Alternate Webpage(s) | https://doi.org/10.1063/1.2191884 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
