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Figure 4 | Nanoscale Research Letters

Figure 4

From: Room-temperature electrically pumped near-infrared random lasing from high-quality m-plane ZnO-based metal-insulator-semiconductor devices

Figure 4

O 1s XPS spectra and PL spectra of the ZnO thin films. (a) O 1 s XPS spectra of the ZnO thin films. Dots are the experimental data and lines are the fitting results. (b) The PL spectra of the ZnO thin films before and after depositing a 50-nm Al2O3 cap layer. The inset of (b) is the magnified area of the PL spectra from 450 to 600 nm.

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