Non-steady state operation of polymer/TiO2 photovoltaic devices
We present data on the initial period of operation of Gilch-route NMH-PPV/TiO2 composite solar cells (CSCs) which show that during this period the CSCs operate in a non-steady state regime. The behavior is complex and may include a gradual rise of the open circuit voltage (V-oc) and of the short-cir...
| Main Authors: | , , , , , , , , |
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| Format: | Conference item |
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2004
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| _version_ | 1797096635783708672 |
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| author | Kirov, K Burlakov, V Xie, Z Henry, B Carey, M Grovenor, C Burn, P Assender, H Briggs, G |
| author_facet | Kirov, K Burlakov, V Xie, Z Henry, B Carey, M Grovenor, C Burn, P Assender, H Briggs, G |
| author_sort | Kirov, K |
| collection | OXFORD |
| description | We present data on the initial period of operation of Gilch-route NMH-PPV/TiO2 composite solar cells (CSCs) which show that during this period the CSCs operate in a non-steady state regime. The behavior is complex and may include a gradual rise of the open circuit voltage (V-oc) and of the short-circuit current density (J(sc)) with time, a passage through a maximum of either or both parameters, and even a sign reversal. The mechanisms most probably contributing to the transient processes are: i) diffusion driven redistribution of charges resulting in the build up of a quasi steady state charge density profile across the device; ii) photo-doping resulting in a relatively slow increase of the average charge carrier concentration and consequently of the conductivity of the device. The latter is responsible for a strong decrease in V-oc, and is evidenced by the significant increase in dark current after device illumination. |
| first_indexed | 2024-03-07T04:44:21Z |
| format | Conference item |
| id | oxford-uuid:d2bc4204-6814-407a-b112-de1ebb9c0d5d |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:44:21Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:d2bc4204-6814-407a-b112-de1ebb9c0d5d2022-03-27T08:06:09ZNon-steady state operation of polymer/TiO2 photovoltaic devicesConference itemhttp://purl.org/coar/resource_type/c_5794uuid:d2bc4204-6814-407a-b112-de1ebb9c0d5dSymplectic Elements at Oxford2004Kirov, KBurlakov, VXie, ZHenry, BCarey, MGrovenor, CBurn, PAssender, HBriggs, GWe present data on the initial period of operation of Gilch-route NMH-PPV/TiO2 composite solar cells (CSCs) which show that during this period the CSCs operate in a non-steady state regime. The behavior is complex and may include a gradual rise of the open circuit voltage (V-oc) and of the short-circuit current density (J(sc)) with time, a passage through a maximum of either or both parameters, and even a sign reversal. The mechanisms most probably contributing to the transient processes are: i) diffusion driven redistribution of charges resulting in the build up of a quasi steady state charge density profile across the device; ii) photo-doping resulting in a relatively slow increase of the average charge carrier concentration and consequently of the conductivity of the device. The latter is responsible for a strong decrease in V-oc, and is evidenced by the significant increase in dark current after device illumination. |
| spellingShingle | Kirov, K Burlakov, V Xie, Z Henry, B Carey, M Grovenor, C Burn, P Assender, H Briggs, G Non-steady state operation of polymer/TiO2 photovoltaic devices |
| title | Non-steady state operation of polymer/TiO2 photovoltaic devices |
| title_full | Non-steady state operation of polymer/TiO2 photovoltaic devices |
| title_fullStr | Non-steady state operation of polymer/TiO2 photovoltaic devices |
| title_full_unstemmed | Non-steady state operation of polymer/TiO2 photovoltaic devices |
| title_short | Non-steady state operation of polymer/TiO2 photovoltaic devices |
| title_sort | non steady state operation of polymer tio2 photovoltaic devices |
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