Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines:
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English German |
| Veröffentlicht: |
2014
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| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Zsfassung in dt. und engl. Sprache |
| Beschreibung: | XI, 148 S. Ill., graph. Darst. |
Internformat
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| 245 | 1 | 0 | |a Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines |c vorgelegt von Steven Michael Graf |
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| 300 | |a XI, 148 S. |b Ill., graph. Darst. | ||
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| 502 | |a Köln, Univ., Diss., 2014 | ||
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Datensatz im Suchindex
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| adam_text | Titel: Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines
Autor: Graf, Steven Michael
Jahr: 2014
Contents
1 Introduction and Motivation 1
2 Organic Semiconductors 5
2.1 Electronic Structure ....................................................5
2.2 Excited States............................................................6
3 Solar Radiation 9
4 Organic Bulk Heterojunction Solar Cells 13
4.1 Historical Overview......................................................13
4.2 Device Physics ..........................................................15
4.2.1 Exciton Generation..............................................15
4.2.2 Exciton Diffusion and Charge Transfer State..................15
4.2.3 Charge Transfer State Separation..............................17
4.2.4 Charge Carrier Transport ......................................18
4.2.5 Charge Carrier Extraction......................................20
4.3 Electric Characterization of Solar Cells................................20
4.4 Charge Carrier Recombination in Organic Solar Cells................24
4.4.1 Geminate Recombination........................................24
4.4.2 Nongeminate Recombination..........................25
4.4.3 Langevin Recombination........................................26
5 Materials 29
5.1 Merocyanines............................................................29
5.1.1 General Description and Physical Properties..................29
5.1.2 Application in Organic Photovoltaics..........................31
5.1.3 Investigated Dyes................................................32
5.2 Acceptors................................................................34
6 Excited States in Merocyanine Dyes 37
6.1 The Molecular Level....................................................38
6.1.1 Results............................................................38
6.1.2 Discussion........................................................40
6.2 The Supramolecular Level..............................................41
6.2.1 Absorption ......................................................41
6.2.1.1 Results ................................................41
6.2.1.2 Discussion..............................................43
6.2.2 Steady-State Photoluminescence...............45
6.2.2.1 Results.......................................45
6.2.2.2 Discussion..............................................50
6.2.3 Time Resolved Photoluminescence ............................51
6.2.3.1 Results................................................51
6.2.3.2 Discussion..............................................53
6.3 The Bulk Heterojunction System Level................................54
6.3.1 Absorption ......................................................54
6.3.1.1 Results................................................54
6.3.1.2 Discussion..............................................54
6.3.2 Steady-State Photoluminescence and Electroluminescence . . 56
6.3.2.1 Results................................................56
6.3.2.2 Discussion..............................................61
6.3.3 Time Resolved Photoluminescence ............................62
6.3.3.1 Results................................................62
6.3.3.2 Discussion........................................65
6.4 Conclusion.......................65
7 The Performance of Merocyanine Solar Cells 67
7.1 Devices ...................67
7.2 JV-Characteristics ...............................69
7.2.1 Results............................................................69
7.2.2 Discussion........................................................71
7.3 External Quantum Efficiency ..........................................73
7.3.1 Results............................................................73
7.3.2 Discussion........................................................75
7.4 Internal Quantum Efficiency............................................76
7.4.1 Results............................................................76
7.4.2 Discussion........................................................78
7.5 Conclusion.........................78
8 The Influence of Temperature on the Solar Sell Characteristics 79
8.1 Results.........................79
8.2 Discussion................82
8.3 Conclusion...............84
9 Charge Carrier Recombination in Merocyanine Solar Cells 85
9.1 Light Intensity Dependence ............................................85
9.1.1 Results............................................................85
9.1.2 Discussion........................................................92
9.1.3 Conclusion........................................................93
9.2 Bimolecular Recombination Dynamics ................................94
9.2.1 Results............................................................94
9.3 Mobility and Lifetime of Photogenerated Charge Carriers......102
9.3.1 Results.............................. 102
9.3.2 Discussion............................ 109
9.4 Field Dependence of CT-State Separation .............. 113
9.4.1 Results.............................. 113
9.4.2 Discussion............................ 116
10 Experimental 119
10.1 Device Fabrication........................... 119
10.1.1 Solution Processed Devices................... 120
10.1.2 Vacuum Deposited Devices................... 120
10.2 Device Analysis............................. 121
10.2.1 Charge Extraction by Linearly Increasing Voltage (CELIV) . 121
10.2.2 Absorption and Reflection................... 124
10.2.3 Photoluminescence....................... 125
10.2.4 Electroluminescence ...................... 126
10.2.5 JV-Characteristics ....................... 126
10.2.6 Quantum Efficiency Measurements.............. 127
11 Conclusion and Outlook 129
Bibliography 133
Acknowledgement 149
Personal Bibliography 150
Declaration 152
Curriculum Vitae 153
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| illustrated | Illustrated |
| indexdate | 2024-07-10T07:08:27Z |
| institution | BVB |
| language | English German |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-028163381 |
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| physical | XI, 148 S. Ill., graph. Darst. |
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| spelling | Graf, Steven 1983- Verfasser (DE-588)1071550470 aut Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines vorgelegt von Steven Michael Graf 2014 XI, 148 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Zsfassung in dt. und engl. Sprache Köln, Univ., Diss., 2014 Merocyanine (DE-588)4169461-2 gnd rswk-swf Angeregter Zustand (DE-588)4142423-2 gnd rswk-swf Organische Solarzelle (DE-588)7617672-1 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Merocyanine (DE-588)4169461-2 s Organische Solarzelle (DE-588)7617672-1 s Angeregter Zustand (DE-588)4142423-2 s DE-604 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028163381&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Graf, Steven 1983- Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines Merocyanine (DE-588)4169461-2 gnd Angeregter Zustand (DE-588)4142423-2 gnd Organische Solarzelle (DE-588)7617672-1 gnd |
| subject_GND | (DE-588)4169461-2 (DE-588)4142423-2 (DE-588)7617672-1 (DE-588)4113937-9 |
| title | Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines |
| title_auth | Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines |
| title_exact_search | Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines |
| title_full | Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines vorgelegt von Steven Michael Graf |
| title_fullStr | Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines vorgelegt von Steven Michael Graf |
| title_full_unstemmed | Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines vorgelegt von Steven Michael Graf |
| title_short | Excited states and recombination in organic bulk heterojunction solar cells based on merocyanines |
| title_sort | excited states and recombination in organic bulk heterojunction solar cells based on merocyanines |
| topic | Merocyanine (DE-588)4169461-2 gnd Angeregter Zustand (DE-588)4142423-2 gnd Organische Solarzelle (DE-588)7617672-1 gnd |
| topic_facet | Merocyanine Angeregter Zustand Organische Solarzelle Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028163381&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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