Nanocomposite titanium dioxide/polymer photovoltaic cells: effects of TiO2 microstructure, time and illumination power.
Nanocomposite titanium dioxide/polymer photovoltaic cells have been fabricated using poly[2-(2-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEHPPV). Two different types of titanium dioxide were used, one synthesized using a sol-gel method, the other was a commercial paste. The crystal structure,...
| Main Authors: | , , , , , , , , |
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| Format: | Conference item |
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2004
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| _version_ | 1797059566441070592 |
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| author | Carey, M Burlakov, V Henry, B Kirov, K Webster, G Assender, H Briggs, G Burn, P Grovenor, C |
| author_facet | Carey, M Burlakov, V Henry, B Kirov, K Webster, G Assender, H Briggs, G Burn, P Grovenor, C |
| author_sort | Carey, M |
| collection | OXFORD |
| description | Nanocomposite titanium dioxide/polymer photovoltaic cells have been fabricated using poly[2-(2-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEHPPV). Two different types of titanium dioxide were used, one synthesized using a sol-gel method, the other was a commercial paste. The crystal structure, porosity and absorption spectra of the titanium dioxide layers were measured, and the titanium dioxide synthesized using the sol-gel method had a much lower level of anatase. The photovoltaic properties of the ITO/TiO2/MEHPPV/Au cells, which were similar for both types of TiO2, were measured as a function of illumination power and compared with equivalent circuit models. A simple equivalent circuit model incorporating a diode, two resistances and a light induced current was inconsistent with the illumination - dependent data and was improved by adding an illumination dependent shunt resistance. A very long lived, photo-induced increase in dark current was observed, which could not be explained by a polymer degradation mechanism or an increase in temperature under illumination, but was more likely to be due to trapped charge. |
| first_indexed | 2024-03-06T20:06:08Z |
| format | Conference item |
| id | oxford-uuid:28f6bb53-7a65-4351-a018-38a0162b30b8 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:06:08Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:28f6bb53-7a65-4351-a018-38a0162b30b82022-03-26T12:16:15ZNanocomposite titanium dioxide/polymer photovoltaic cells: effects of TiO2 microstructure, time and illumination power.Conference itemhttp://purl.org/coar/resource_type/c_5794uuid:28f6bb53-7a65-4351-a018-38a0162b30b8Symplectic Elements at Oxford2004Carey, MBurlakov, VHenry, BKirov, KWebster, GAssender, HBriggs, GBurn, PGrovenor, CNanocomposite titanium dioxide/polymer photovoltaic cells have been fabricated using poly[2-(2-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEHPPV). Two different types of titanium dioxide were used, one synthesized using a sol-gel method, the other was a commercial paste. The crystal structure, porosity and absorption spectra of the titanium dioxide layers were measured, and the titanium dioxide synthesized using the sol-gel method had a much lower level of anatase. The photovoltaic properties of the ITO/TiO2/MEHPPV/Au cells, which were similar for both types of TiO2, were measured as a function of illumination power and compared with equivalent circuit models. A simple equivalent circuit model incorporating a diode, two resistances and a light induced current was inconsistent with the illumination - dependent data and was improved by adding an illumination dependent shunt resistance. A very long lived, photo-induced increase in dark current was observed, which could not be explained by a polymer degradation mechanism or an increase in temperature under illumination, but was more likely to be due to trapped charge. |
| spellingShingle | Carey, M Burlakov, V Henry, B Kirov, K Webster, G Assender, H Briggs, G Burn, P Grovenor, C Nanocomposite titanium dioxide/polymer photovoltaic cells: effects of TiO2 microstructure, time and illumination power. |
| title | Nanocomposite titanium dioxide/polymer photovoltaic cells: effects of TiO2 microstructure, time and illumination power. |
| title_full | Nanocomposite titanium dioxide/polymer photovoltaic cells: effects of TiO2 microstructure, time and illumination power. |
| title_fullStr | Nanocomposite titanium dioxide/polymer photovoltaic cells: effects of TiO2 microstructure, time and illumination power. |
| title_full_unstemmed | Nanocomposite titanium dioxide/polymer photovoltaic cells: effects of TiO2 microstructure, time and illumination power. |
| title_short | Nanocomposite titanium dioxide/polymer photovoltaic cells: effects of TiO2 microstructure, time and illumination power. |
| title_sort | nanocomposite titanium dioxide polymer photovoltaic cells effects of tio2 microstructure time and illumination power |
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