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Investigations of the valence states, cobalt ion distribution, and defect structures in Co-doped ITO films
Lin, Z; Lai, WL; Wu ZH(吴忠华); Wu, ZH; Liu, JW; An, YK
2018
Source PublicationJOURNAL OF MATERIALS RESEARCH
ISSN0884-2914
EISSN2044-5326
Volume33Issue:16Pages:2336-2341
SubtypeArticle
AbstractThe valence states, the distribution of Co ions, and defect structures in the Co-doped ITO films with Co concentrations of 5-13 at.% were examined by X-ray absorption spectroscopy (XAS) at Co, K, and L-edges. The structural analyses and ab initio calculations reveal that the Co atoms are substantially incorporated into the ITO lattice and form cobalt-vacancy complexes, while partial formation of Co-0 species is observed for all the films. The analyses of Co-K edge XAS reveal that the Co-O bond length RCo-O is shortened and the corresponding Debye-Waller factor (sigma(2)) obviously increases with Co doping, implying the relaxation of oxygen environment around the substitutional Co ions. The qualitative fitting of Co L-3-edge XAS further confirms the coexistence of Co-0 and Co2+ in the films. The Co atoms mainly occupy the substitutional sites of In2O3 lattices with the metallic Co clusters being about 20-43 at.% for the 5, 7, and 8.5 at.% Co-doped ITO films. However, a significant fraction (similar to 57 at.%) of metallic Co clusters is found in the 13 at.% Co-doped ITO film.
DOI10.1557/jmr.2018.184
WOS KeywordRAY-ABSORPTION-SPECTROSCOPY ; THIN-FILMS ; FERROMAGNETISM
Indexed BySCI ; ADS ; EI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000443025100008
EI Accession Number20182605366479
ADS Bibcode2018JMatR..33.2336L
ADS URLhttps://ui.adsabs.harvard.edu/abs/2018JMatR..33.2336L
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2018JMatR..33.2336L/citations
Citation statistics
Cited Times:0 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/286253
Collection多学科研究中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Lin, Z,Lai, WL,Wu ZH,et al. Investigations of the valence states, cobalt ion distribution, and defect structures in Co-doped ITO films[J]. JOURNAL OF MATERIALS RESEARCH,2018,33(16):2336-2341.
APA Lin, Z,Lai, WL,吴忠华,Wu, ZH,Liu, JW,&An, YK.(2018).Investigations of the valence states, cobalt ion distribution, and defect structures in Co-doped ITO films.JOURNAL OF MATERIALS RESEARCH,33(16),2336-2341.
MLA Lin, Z,et al."Investigations of the valence states, cobalt ion distribution, and defect structures in Co-doped ITO films".JOURNAL OF MATERIALS RESEARCH 33.16(2018):2336-2341.
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