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12.4: Surface Exciton Properties of MgO in ZnO‐MgO Core‐Shell Quantum‐Dots
Author(s) -
Kuang WenJian,
Li Qing,
Tolner Harm,
Sun ShuaiShuai,
Huang Yan,
Tao Ye
Publication year - 2014
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2014.tb00039.x
Subject(s) - exciton , quantum dot , materials science , synchrotron radiation , biexciton , ultraviolet , core (optical fiber) , molecular physics , band offset , optoelectronics , atomic physics , chemical physics , condensed matter physics , chemistry , valence band , band gap , physics , optics , composite material
MgO crystals have been exposed to vacuum ultraviolet (VUV) radiation from a synchrotron, with energies up to 9 eV. It is concluded that bulk excitons, play an important role in the diffusion of energy inside MgO crystals, resulting in 5.77 eV (215 nm) surface exciton emission. We discuss the possible use in ZnO‐MgO core‐shell quantum‐dots (QDs), including energy band offset and charge carrier transfer.