PHOTOELECTRON-SPECTROSCOPY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE
Single crystals of the n-type semiconducting tin dichalcogenides SnS2-xSex (x = 0, 0.3, 0.5, 1.3, 1.85, 2), which have a two-dimensional layered structure, have been intercalated with cobaltocene to give the series of compounds SnS2-xSex(CoCp2)0.33, where Cp = η5-C5H5. Photoelectron spectroscopy has...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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1990
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| _version_ | 1826282992058761216 |
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| author | Formstone, C Fitzgerald, E Cox, P Ohare, D |
| author_facet | Formstone, C Fitzgerald, E Cox, P Ohare, D |
| author_sort | Formstone, C |
| collection | OXFORD |
| description | Single crystals of the n-type semiconducting tin dichalcogenides SnS2-xSex (x = 0, 0.3, 0.5, 1.3, 1.85, 2), which have a two-dimensional layered structure, have been intercalated with cobaltocene to give the series of compounds SnS2-xSex(CoCp2)0.33, where Cp = η5-C5H5. Photoelectron spectroscopy has been employed to investigate the electronic changes upon intercalation, especially the electron transfer from the guest to the host. X-ray photoelectron spectroscopy (XPS) has revealed mixed oxidation states for both tin [Sn(II), Sn(IV)] and cobalt [Co(I), Co(II), Co(III)]. Of the three cobalt species observed by XPS, two have been unambiguously identified as CoCp2 and [COCp2]+, whereas the third cobalt species has only been tentatively assigned to a Co(η5-C5H5(η4-C 5H5R) complex, in which cobalt is formally in the oxidation state Co(I). Ultraviolet photoelectron spectroscopy (UVPES) shows that the intercalates are either semiconducting (x = 0, 0.3, 0.5, 1.3) or metallic (x = 1.85, 2), whereas all the hosts are n-type semiconductors. An impurity-band model is presented as a possible qualitative explanation for this transition through the series. © 1990 American Chemical Society. |
| first_indexed | 2024-03-07T00:52:12Z |
| format | Journal article |
| id | oxford-uuid:86c5bb28-2045-4608-a82b-c499685e79dc |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:52:12Z |
| publishDate | 1990 |
| record_format | dspace |
| spelling | oxford-uuid:86c5bb28-2045-4608-a82b-c499685e79dc2022-03-26T22:06:17ZPHOTOELECTRON-SPECTROSCOPY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENEJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:86c5bb28-2045-4608-a82b-c499685e79dcEnglishSymplectic Elements at Oxford1990Formstone, CFitzgerald, ECox, POhare, DSingle crystals of the n-type semiconducting tin dichalcogenides SnS2-xSex (x = 0, 0.3, 0.5, 1.3, 1.85, 2), which have a two-dimensional layered structure, have been intercalated with cobaltocene to give the series of compounds SnS2-xSex(CoCp2)0.33, where Cp = η5-C5H5. Photoelectron spectroscopy has been employed to investigate the electronic changes upon intercalation, especially the electron transfer from the guest to the host. X-ray photoelectron spectroscopy (XPS) has revealed mixed oxidation states for both tin [Sn(II), Sn(IV)] and cobalt [Co(I), Co(II), Co(III)]. Of the three cobalt species observed by XPS, two have been unambiguously identified as CoCp2 and [COCp2]+, whereas the third cobalt species has only been tentatively assigned to a Co(η5-C5H5(η4-C 5H5R) complex, in which cobalt is formally in the oxidation state Co(I). Ultraviolet photoelectron spectroscopy (UVPES) shows that the intercalates are either semiconducting (x = 0, 0.3, 0.5, 1.3) or metallic (x = 1.85, 2), whereas all the hosts are n-type semiconductors. An impurity-band model is presented as a possible qualitative explanation for this transition through the series. © 1990 American Chemical Society. |
| spellingShingle | Formstone, C Fitzgerald, E Cox, P Ohare, D PHOTOELECTRON-SPECTROSCOPY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title | PHOTOELECTRON-SPECTROSCOPY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title_full | PHOTOELECTRON-SPECTROSCOPY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title_fullStr | PHOTOELECTRON-SPECTROSCOPY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title_full_unstemmed | PHOTOELECTRON-SPECTROSCOPY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title_short | PHOTOELECTRON-SPECTROSCOPY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title_sort | photoelectron spectroscopy of the tin dichalcogenides sns2 xsex intercalated with cobaltocene |
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