Electroabsorption studies of organic p-i-n solar cells: Increase of the built-in voltage by higher doping concentration in the hole transport layer
The built-in voltage in solar cells has a significant influence on the extraction of photogenerated charge carriers. For small molecule organic solar cells based on the p-i-n structure, we investigate the dependence of the built-in voltage on the work function of both the hole transport layer and th...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Elsevier
2014
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| _version_ | 1826293902166982656 |
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| author | Siebert-Henze, E Lyssenko, V Fischer, J Tietze, M Brueckner, R Menke, T Leo, K Riede, M |
| author_facet | Siebert-Henze, E Lyssenko, V Fischer, J Tietze, M Brueckner, R Menke, T Leo, K Riede, M |
| author_sort | Siebert-Henze, E |
| collection | OXFORD |
| description | The built-in voltage in solar cells has a significant influence on the extraction of photogenerated charge carriers. For small molecule organic solar cells based on the p-i-n structure, we investigate the dependence of the built-in voltage on the work function of both the hole transport layer and the electrode material. The model system investigated here consists of a planar heterojunction with N,N,N′,N′-tetrakis(4-methoxyphenyl)-benzidine (MeO-TPD) as donor and Buckminster Fullerene (C<sub>60</sub>) as acceptor material. A higher concentration of the dopant C<sub>60</sub>F<sub>36</sub> in the hole transport layer induces a shift of the work function towards the transport level. The resulting increase of the built-in voltage is studied using electroabsorption spectroscopy, measuring the change in absorption (Stark effect) caused by an externally applied electric field. An evaluation of these electroabsorption spectra as a function of the applied DC voltage enables the direct measurement of the built-in voltage. It is also shown that an increased built-in voltage does lead to a larger short-circuit current as well as a larger fill factor. © 2013 Elsevier B.V. All rights reserved. |
| first_indexed | 2024-03-07T03:37:20Z |
| format | Journal article |
| id | oxford-uuid:bcbb4300-c6c8-4d61-b2e8-bb903eee6a11 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:37:20Z |
| publishDate | 2014 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:bcbb4300-c6c8-4d61-b2e8-bb903eee6a112022-03-27T05:26:30ZElectroabsorption studies of organic p-i-n solar cells: Increase of the built-in voltage by higher doping concentration in the hole transport layerJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:bcbb4300-c6c8-4d61-b2e8-bb903eee6a11EnglishSymplectic Elements at OxfordElsevier2014Siebert-Henze, ELyssenko, VFischer, JTietze, MBrueckner, RMenke, TLeo, KRiede, MThe built-in voltage in solar cells has a significant influence on the extraction of photogenerated charge carriers. For small molecule organic solar cells based on the p-i-n structure, we investigate the dependence of the built-in voltage on the work function of both the hole transport layer and the electrode material. The model system investigated here consists of a planar heterojunction with N,N,N′,N′-tetrakis(4-methoxyphenyl)-benzidine (MeO-TPD) as donor and Buckminster Fullerene (C<sub>60</sub>) as acceptor material. A higher concentration of the dopant C<sub>60</sub>F<sub>36</sub> in the hole transport layer induces a shift of the work function towards the transport level. The resulting increase of the built-in voltage is studied using electroabsorption spectroscopy, measuring the change in absorption (Stark effect) caused by an externally applied electric field. An evaluation of these electroabsorption spectra as a function of the applied DC voltage enables the direct measurement of the built-in voltage. It is also shown that an increased built-in voltage does lead to a larger short-circuit current as well as a larger fill factor. © 2013 Elsevier B.V. All rights reserved. |
| spellingShingle | Siebert-Henze, E Lyssenko, V Fischer, J Tietze, M Brueckner, R Menke, T Leo, K Riede, M Electroabsorption studies of organic p-i-n solar cells: Increase of the built-in voltage by higher doping concentration in the hole transport layer |
| title | Electroabsorption studies of organic p-i-n solar cells: Increase of the built-in voltage by higher doping concentration in the hole transport layer |
| title_full | Electroabsorption studies of organic p-i-n solar cells: Increase of the built-in voltage by higher doping concentration in the hole transport layer |
| title_fullStr | Electroabsorption studies of organic p-i-n solar cells: Increase of the built-in voltage by higher doping concentration in the hole transport layer |
| title_full_unstemmed | Electroabsorption studies of organic p-i-n solar cells: Increase of the built-in voltage by higher doping concentration in the hole transport layer |
| title_short | Electroabsorption studies of organic p-i-n solar cells: Increase of the built-in voltage by higher doping concentration in the hole transport layer |
| title_sort | electroabsorption studies of organic p i n solar cells increase of the built in voltage by higher doping concentration in the hole transport layer |
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