Side chain variations on a series of dicyanovinyl-terthiophenes: a photoinduced absorption study.
We characterize a series of dicyanovinyl-terthiophenes with different alkyl side chains. Variations of side chain substitution patterns and length mainly affect the morphology of the evaporated thin films, which in turn sensitively influences properties like absorption, energy levels, and thin film...
| Main Authors: | , , , , , , , |
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| 格式: | Journal article |
| 语言: | English |
| 出版: |
American Chemical Society
2011
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| _version_ | 1826273081210961920 |
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| author | Ziehlke, H Fitzner, R Koerner, C Gresser, R Reinold, E Bäuerle, P Leo, K Riede, M |
| author_facet | Ziehlke, H Fitzner, R Koerner, C Gresser, R Reinold, E Bäuerle, P Leo, K Riede, M |
| author_sort | Ziehlke, H |
| collection | OXFORD |
| description | We characterize a series of dicyanovinyl-terthiophenes with different alkyl side chains. Variations of side chain substitution patterns and length mainly affect the morphology of the evaporated thin films, which in turn sensitively influences properties like absorption, energy levels, and thin film roughness. To investigate changes in transfer processes between electron donor (D) and acceptor (A) molecules due to side chain variations, we use photoinduced absorption spectroscopy (PIA). PIA probes the long-living photoexcited species at the D-A interface: triplet excitons, cations, and anions. For a blend layer of dicyanovinyl-terthiophene and the electron acceptor fullerene C<sub>60</sub>, an energy transfer via the singlet and triplet manifold of C<sub>60</sub> occurs. The recombination dynamics of the triplet excitons reveal two components that differ in their lifetime and generation rate by 1 order of magnitude. By comparing the dynamics of triplet excitons in neat and blend layers, we estimate the energy transfer efficiency in dependence of the type of side chain. The compound with methyl side chains shows remarkable properties regarding thin film absorption, surface roughness, and energy transfer efficiency, which we attribute to the specific nanomorphology of the thin film. © 2011 American Chemical Society. |
| first_indexed | 2024-03-06T22:22:43Z |
| format | Journal article |
| id | oxford-uuid:559eed4c-0d6d-4b51-b0f4-d00d9ff6526c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:22:43Z |
| publishDate | 2011 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:559eed4c-0d6d-4b51-b0f4-d00d9ff6526c2022-03-26T16:45:04ZSide chain variations on a series of dicyanovinyl-terthiophenes: a photoinduced absorption study.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:559eed4c-0d6d-4b51-b0f4-d00d9ff6526cEnglishSymplectic Elements at OxfordAmerican Chemical Society2011Ziehlke, HFitzner, RKoerner, CGresser, RReinold, EBäuerle, PLeo, KRiede, MWe characterize a series of dicyanovinyl-terthiophenes with different alkyl side chains. Variations of side chain substitution patterns and length mainly affect the morphology of the evaporated thin films, which in turn sensitively influences properties like absorption, energy levels, and thin film roughness. To investigate changes in transfer processes between electron donor (D) and acceptor (A) molecules due to side chain variations, we use photoinduced absorption spectroscopy (PIA). PIA probes the long-living photoexcited species at the D-A interface: triplet excitons, cations, and anions. For a blend layer of dicyanovinyl-terthiophene and the electron acceptor fullerene C<sub>60</sub>, an energy transfer via the singlet and triplet manifold of C<sub>60</sub> occurs. The recombination dynamics of the triplet excitons reveal two components that differ in their lifetime and generation rate by 1 order of magnitude. By comparing the dynamics of triplet excitons in neat and blend layers, we estimate the energy transfer efficiency in dependence of the type of side chain. The compound with methyl side chains shows remarkable properties regarding thin film absorption, surface roughness, and energy transfer efficiency, which we attribute to the specific nanomorphology of the thin film. © 2011 American Chemical Society. |
| spellingShingle | Ziehlke, H Fitzner, R Koerner, C Gresser, R Reinold, E Bäuerle, P Leo, K Riede, M Side chain variations on a series of dicyanovinyl-terthiophenes: a photoinduced absorption study. |
| title | Side chain variations on a series of dicyanovinyl-terthiophenes: a photoinduced absorption study. |
| title_full | Side chain variations on a series of dicyanovinyl-terthiophenes: a photoinduced absorption study. |
| title_fullStr | Side chain variations on a series of dicyanovinyl-terthiophenes: a photoinduced absorption study. |
| title_full_unstemmed | Side chain variations on a series of dicyanovinyl-terthiophenes: a photoinduced absorption study. |
| title_short | Side chain variations on a series of dicyanovinyl-terthiophenes: a photoinduced absorption study. |
| title_sort | side chain variations on a series of dicyanovinyl terthiophenes a photoinduced absorption study |
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