TY - JOUR
T1 - Silver related emitting defects and aging ZnO nanocrystals
AU - Torchynska, T. V.
AU - El Filali, B.
AU - Ballardo Rodriguez, Ch
AU - Polupan, G.
AU - Shcherbyna, L.
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/6/1
Y1 - 2018/6/1
N2 - The emission, morphology, structure and chemical composition have been studied in Ag-doped ZnO nanocrystals (NCs) in as-grown state and after aging in ambient air by means of SEM, X-ray diffraction (XRD), photoluminescence (PL) and X-ray photo electronic spectroscopy (XPS) methods. PL spectra of as-grown Ag-doped ZnO NCs include a set of elementary PL bands: near band edge (NBE) emission, green and orange PL bands, as well as Ag related PL bands with the peaks at 2.68 and 2.89 eV. The PL intensity of Ag- related PL bands falls down at aging. Simultaneously, the PL intensity of orange PL band increases. Joint XRD analysis and PL study permit identifying the optical transition connected with the substitutional AgZn defects. At XPS research the variation of AgZn state and the formation of Ag oxide at aging has been revealed. The radiative defect transformations at aging have been analyzed and discussed.
AB - The emission, morphology, structure and chemical composition have been studied in Ag-doped ZnO nanocrystals (NCs) in as-grown state and after aging in ambient air by means of SEM, X-ray diffraction (XRD), photoluminescence (PL) and X-ray photo electronic spectroscopy (XPS) methods. PL spectra of as-grown Ag-doped ZnO NCs include a set of elementary PL bands: near band edge (NBE) emission, green and orange PL bands, as well as Ag related PL bands with the peaks at 2.68 and 2.89 eV. The PL intensity of Ag- related PL bands falls down at aging. Simultaneously, the PL intensity of orange PL band increases. Joint XRD analysis and PL study permit identifying the optical transition connected with the substitutional AgZn defects. At XPS research the variation of AgZn state and the formation of Ag oxide at aging has been revealed. The radiative defect transformations at aging have been analyzed and discussed.
KW - Ag defect modification
KW - Ag-doped ZnO nanocrystals
KW - Aging
KW - Photoluminescence
UR - http://www.scopus.com/inward/record.url?scp=85046013279&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2018.03.021
DO - 10.1016/j.matchemphys.2018.03.021
M3 - Artículo
SN - 0254-0584
VL - 211
SP - 462
EP - 467
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
ER -