High-resolution TEM characterization of ZnO core-shell nanowires for dye-sensitized solar cells
Recently ZnO nanowire films have been used in very promising and inexpensive dye-sensitized solar cells (DSSC). It was found that the performance of the devices can be enhanced by functionalising the nanowires with a thin metal oxide coating. This nm-scale shell is believed to tailor the electronic...
| Main Authors: | , , , , |
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| Format: | Conference item |
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2010
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| _version_ | 1797057384636481536 |
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| author | Divitini, G Plank, N Snaith, H Welland, M Ducati, C |
| author_facet | Divitini, G Plank, N Snaith, H Welland, M Ducati, C |
| author_sort | Divitini, G |
| collection | OXFORD |
| description | Recently ZnO nanowire films have been used in very promising and inexpensive dye-sensitized solar cells (DSSC). It was found that the performance of the devices can be enhanced by functionalising the nanowires with a thin metal oxide coating. This nm-scale shell is believed to tailor the electronic structure of the nanowire, and help the absorption of the dye. Core-shell ZnO nanowire structures are synthesised at low temperature (below 120°C) by consecutive hydrothermal growth steps. Different materials are investigated for the coating, including Mg, Al, Cs and Zr oxides. High resolution TEM is used to characterise the quality of both the nanowire core and the shell, and to monitor the thickness and the degree of crystallisation of the oxide coating. The interface between the nanowire core and the outer shell is investigated in order to understand the adhesion of the coating, and give valuable feedback for the synthesis process. Nanowire films are packaged into dye-sensitised solar cell prototypes; samples coated with ZrO2 and MgO show the largest enhancement in the photocurrent and open-circuit voltage and look very promising for further improvement. © 2010 IOP Publishing Ltd. |
| first_indexed | 2024-03-06T19:35:34Z |
| format | Conference item |
| id | oxford-uuid:1eee8e68-de40-4dd0-bc8c-ed153db1148e |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:35:34Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:1eee8e68-de40-4dd0-bc8c-ed153db1148e2022-03-26T11:18:59ZHigh-resolution TEM characterization of ZnO core-shell nanowires for dye-sensitized solar cellsConference itemhttp://purl.org/coar/resource_type/c_5794uuid:1eee8e68-de40-4dd0-bc8c-ed153db1148eSymplectic Elements at Oxford2010Divitini, GPlank, NSnaith, HWelland, MDucati, CRecently ZnO nanowire films have been used in very promising and inexpensive dye-sensitized solar cells (DSSC). It was found that the performance of the devices can be enhanced by functionalising the nanowires with a thin metal oxide coating. This nm-scale shell is believed to tailor the electronic structure of the nanowire, and help the absorption of the dye. Core-shell ZnO nanowire structures are synthesised at low temperature (below 120°C) by consecutive hydrothermal growth steps. Different materials are investigated for the coating, including Mg, Al, Cs and Zr oxides. High resolution TEM is used to characterise the quality of both the nanowire core and the shell, and to monitor the thickness and the degree of crystallisation of the oxide coating. The interface between the nanowire core and the outer shell is investigated in order to understand the adhesion of the coating, and give valuable feedback for the synthesis process. Nanowire films are packaged into dye-sensitised solar cell prototypes; samples coated with ZrO2 and MgO show the largest enhancement in the photocurrent and open-circuit voltage and look very promising for further improvement. © 2010 IOP Publishing Ltd. |
| spellingShingle | Divitini, G Plank, N Snaith, H Welland, M Ducati, C High-resolution TEM characterization of ZnO core-shell nanowires for dye-sensitized solar cells |
| title | High-resolution TEM characterization of ZnO core-shell nanowires for dye-sensitized solar cells |
| title_full | High-resolution TEM characterization of ZnO core-shell nanowires for dye-sensitized solar cells |
| title_fullStr | High-resolution TEM characterization of ZnO core-shell nanowires for dye-sensitized solar cells |
| title_full_unstemmed | High-resolution TEM characterization of ZnO core-shell nanowires for dye-sensitized solar cells |
| title_short | High-resolution TEM characterization of ZnO core-shell nanowires for dye-sensitized solar cells |
| title_sort | high resolution tem characterization of zno core shell nanowires for dye sensitized solar cells |
| work_keys_str_mv | AT divitinig highresolutiontemcharacterizationofznocoreshellnanowiresfordyesensitizedsolarcells AT plankn highresolutiontemcharacterizationofznocoreshellnanowiresfordyesensitizedsolarcells AT snaithh highresolutiontemcharacterizationofznocoreshellnanowiresfordyesensitizedsolarcells AT wellandm highresolutiontemcharacterizationofznocoreshellnanowiresfordyesensitizedsolarcells AT ducatic highresolutiontemcharacterizationofznocoreshellnanowiresfordyesensitizedsolarcells |