Twofold efficiency increase in nanocrystalline-TiO2/polymer photovoltaic devices by interfacial modification with a lithium salt
Modification of the interface of titanium dioxide/poly[2-(2-ethylhexyloxy)-5-methoxy-1,4,-phenylenevinylene] (TiO2/MEH-PPV) nanocomposite photovoltaic devices with a lithium salt, Li[CF3SO2](2)N, is shown to result in a twofold increase in device efficiency. The devices are of the type ITO/TiO2/MEH-...
| Main Authors: | , , , , , , , |
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| Format: | Conference item |
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2006
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| _version_ | 1797058057445834752 |
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| author | Barkhouse, D Carey, M Xie, Z Kirov, K Henry, B Assender, H Webster, G Burn, P |
| author_facet | Barkhouse, D Carey, M Xie, Z Kirov, K Henry, B Assender, H Webster, G Burn, P |
| author_sort | Barkhouse, D |
| collection | OXFORD |
| description | Modification of the interface of titanium dioxide/poly[2-(2-ethylhexyloxy)-5-methoxy-1,4,-phenylenevinylene] (TiO2/MEH-PPV) nanocomposite photovoltaic devices with a lithium salt, Li[CF3SO2](2)N, is shown to result in a twofold increase in device efficiency. The devices are of the type ITO/TiO2/MEH-PPV/Au. The TiO2 layer is deposited by doctor blading a colloidal anatase paste, and the polymer is then spin-coated on top followed by thermal evaporation of gold contacts. Careful control of manufacturing conditions and use of a 35 nm polymer layer leads to a device efficiency of 0.48% for un-modified devices. The increased efficiency following Li treatment is the result of a 40% increase in both the short-circuit current and fill factor, while the open-circuit voltage remains unchanged. A maximum efficiency of 1.05% has been achieved under 80% sun illumination. This represents a record efficiency for this type of cell. Photoconductivity experiments show a substantial increase in conductivity of the TiO2 layer following Li modification. Interfacial modification is done via a simple soaking procedure, and the effect of varying the concentration of Li[CF3SO2](2)N is discussed. We report investigations into optimization and the mechanism of such improvement, for example by varying processing parameters of the modification procedure or the ionic species themselves. |
| first_indexed | 2024-03-06T19:45:12Z |
| format | Conference item |
| id | oxford-uuid:220ec373-507a-46c7-ae65-49204fabd3af |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:45:12Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:220ec373-507a-46c7-ae65-49204fabd3af2022-03-26T11:36:41ZTwofold efficiency increase in nanocrystalline-TiO2/polymer photovoltaic devices by interfacial modification with a lithium saltConference itemhttp://purl.org/coar/resource_type/c_5794uuid:220ec373-507a-46c7-ae65-49204fabd3afSymplectic Elements at Oxford2006Barkhouse, DCarey, MXie, ZKirov, KHenry, BAssender, HWebster, GBurn, PModification of the interface of titanium dioxide/poly[2-(2-ethylhexyloxy)-5-methoxy-1,4,-phenylenevinylene] (TiO2/MEH-PPV) nanocomposite photovoltaic devices with a lithium salt, Li[CF3SO2](2)N, is shown to result in a twofold increase in device efficiency. The devices are of the type ITO/TiO2/MEH-PPV/Au. The TiO2 layer is deposited by doctor blading a colloidal anatase paste, and the polymer is then spin-coated on top followed by thermal evaporation of gold contacts. Careful control of manufacturing conditions and use of a 35 nm polymer layer leads to a device efficiency of 0.48% for un-modified devices. The increased efficiency following Li treatment is the result of a 40% increase in both the short-circuit current and fill factor, while the open-circuit voltage remains unchanged. A maximum efficiency of 1.05% has been achieved under 80% sun illumination. This represents a record efficiency for this type of cell. Photoconductivity experiments show a substantial increase in conductivity of the TiO2 layer following Li modification. Interfacial modification is done via a simple soaking procedure, and the effect of varying the concentration of Li[CF3SO2](2)N is discussed. We report investigations into optimization and the mechanism of such improvement, for example by varying processing parameters of the modification procedure or the ionic species themselves. |
| spellingShingle | Barkhouse, D Carey, M Xie, Z Kirov, K Henry, B Assender, H Webster, G Burn, P Twofold efficiency increase in nanocrystalline-TiO2/polymer photovoltaic devices by interfacial modification with a lithium salt |
| title | Twofold efficiency increase in nanocrystalline-TiO2/polymer photovoltaic devices by interfacial modification with a lithium salt |
| title_full | Twofold efficiency increase in nanocrystalline-TiO2/polymer photovoltaic devices by interfacial modification with a lithium salt |
| title_fullStr | Twofold efficiency increase in nanocrystalline-TiO2/polymer photovoltaic devices by interfacial modification with a lithium salt |
| title_full_unstemmed | Twofold efficiency increase in nanocrystalline-TiO2/polymer photovoltaic devices by interfacial modification with a lithium salt |
| title_short | Twofold efficiency increase in nanocrystalline-TiO2/polymer photovoltaic devices by interfacial modification with a lithium salt |
| title_sort | twofold efficiency increase in nanocrystalline tio2 polymer photovoltaic devices by interfacial modification with a lithium salt |
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