Joshi, Amish G. and Sahai, Sonal and Gandhi, Namita and Y. G. , Radha Krishna and Haranath, D.
(2010)
Valence band and core-level analysis of highly luminescent ZnO nanocrystals for designing ultrafast optical sensors.
Applied Physics Letters, 96 (12).
123102-1-123102-3.
ISSN 1077-3118
Abstract
The detailed surface analysis such as survey scan, core-level, and valence band spectra of highly luminescent ZnO:Na nanocrystals were studied using the x-ray photoelectron spectroscopy to establish the performed presence of Na+ ions. The observed increase in band gap from 3.30 (bulk) to 4.16 eV (nano), is attributed to the quantum confinement of the motion of electron and holes in all three directions. The photoluminescence and decay measurements have complemented and supported our study to design an efficient and ultrafast responsive optical sensing device.
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