Morphology Control in co-evaporated bulk heterojunction solar cells
Bulk heterojunction solar cells made by vacuum co-evaporation of polythiophene (PTh) and fullerene (C60) are reported and the blend morphology control through donor-acceptor composition and post-situ annealing demonstrated. Co-deposited heterojunctions are shown to generate about 60% higher photocur...
| Main Authors: | , , |
|---|---|
| Format: | Journal article |
| Published: |
Elsevier
2013
|
| _version_ | 1797083622789873664 |
|---|---|
| author | Kovacik, P Assender, H Watt, A |
| author_facet | Kovacik, P Assender, H Watt, A |
| author_sort | Kovacik, P |
| collection | OXFORD |
| description | Bulk heterojunction solar cells made by vacuum co-evaporation of polythiophene (PTh) and fullerene (C60) are reported and the blend morphology control through donor-acceptor composition and post-situ annealing demonstrated. Co-deposited heterojunctions are shown to generate about 60% higher photocurrents than their thickness-optimized PTh/C60 planar heterojunction counterparts. Furthermore, by annealing the devices post-situ the power conversion efficiency is improved by as much as 80%. UV-vis, XRD and AFM analysis shows that the enhanced photoresponse is a result of favorable morphological development of PTh upon annealing. Annealing-induced improvement of the donor-acceptor network is demonstrated across a wide range of compositions (20-80% PTh). This illustrates that good morphology control is possible in co-evaporated polymer-fullerene blends through multiple parameters and differentiates this donor-acceptor combination from the standard small-molecule systems. © 2013 The Authors. |
| first_indexed | 2024-03-07T01:44:01Z |
| format | Journal article |
| id | oxford-uuid:97cae9f2-3a56-40e6-9f03-8a73bb208364 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T01:44:01Z |
| publishDate | 2013 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:97cae9f2-3a56-40e6-9f03-8a73bb2083642022-03-27T00:02:32ZMorphology Control in co-evaporated bulk heterojunction solar cellsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:97cae9f2-3a56-40e6-9f03-8a73bb208364Symplectic Elements at OxfordElsevier2013Kovacik, PAssender, HWatt, ABulk heterojunction solar cells made by vacuum co-evaporation of polythiophene (PTh) and fullerene (C60) are reported and the blend morphology control through donor-acceptor composition and post-situ annealing demonstrated. Co-deposited heterojunctions are shown to generate about 60% higher photocurrents than their thickness-optimized PTh/C60 planar heterojunction counterparts. Furthermore, by annealing the devices post-situ the power conversion efficiency is improved by as much as 80%. UV-vis, XRD and AFM analysis shows that the enhanced photoresponse is a result of favorable morphological development of PTh upon annealing. Annealing-induced improvement of the donor-acceptor network is demonstrated across a wide range of compositions (20-80% PTh). This illustrates that good morphology control is possible in co-evaporated polymer-fullerene blends through multiple parameters and differentiates this donor-acceptor combination from the standard small-molecule systems. © 2013 The Authors. |
| spellingShingle | Kovacik, P Assender, H Watt, A Morphology Control in co-evaporated bulk heterojunction solar cells |
| title | Morphology Control in co-evaporated bulk heterojunction solar cells |
| title_full | Morphology Control in co-evaporated bulk heterojunction solar cells |
| title_fullStr | Morphology Control in co-evaporated bulk heterojunction solar cells |
| title_full_unstemmed | Morphology Control in co-evaporated bulk heterojunction solar cells |
| title_short | Morphology Control in co-evaporated bulk heterojunction solar cells |
| title_sort | morphology control in co evaporated bulk heterojunction solar cells |
| work_keys_str_mv | AT kovacikp morphologycontrolincoevaporatedbulkheterojunctionsolarcells AT assenderh morphologycontrolincoevaporatedbulkheterojunctionsolarcells AT watta morphologycontrolincoevaporatedbulkheterojunctionsolarcells |