Enhancement of Spontaneous Orientation Polarization in Organic Semiconductor Mixtures
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866912354117091328 |
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| author | Hofmann, Alexander Cakaj, Albin Kolb, Lea Noguchi, Yutaka Brütting, Wolfgang |
| author_facet | Hofmann, Alexander Cakaj, Albin Kolb, Lea Noguchi, Yutaka Brütting, Wolfgang |
| contents | The alignment of permanent dipole moments and the resulting spontaneous orientation polarization (SOP) is commonly observed in evaporated neat films of polar organic molecules and leads to a so-called giant surface potential. In case of mixed films, often enhanced molecular orientation is observed, i.e.\ a higher degree of alignment, in comparison to neat layers, if it is diluted into a suitable (non-polar) host. So far, different possible influences on molecular orientation have been discussed, the most prominent probably being the so-called surface equilibration model. In this contribution, we discuss how surface equilibration can influence orientation in mixed layers, and which other intermolecular interactions have to be considered to explain the observed enhancement of SOP in mixed layers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_17060 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Enhancement of Spontaneous Orientation Polarization in Organic Semiconductor Mixtures Hofmann, Alexander Cakaj, Albin Kolb, Lea Noguchi, Yutaka Brütting, Wolfgang Materials Science Applied Physics The alignment of permanent dipole moments and the resulting spontaneous orientation polarization (SOP) is commonly observed in evaporated neat films of polar organic molecules and leads to a so-called giant surface potential. In case of mixed films, often enhanced molecular orientation is observed, i.e.\ a higher degree of alignment, in comparison to neat layers, if it is diluted into a suitable (non-polar) host. So far, different possible influences on molecular orientation have been discussed, the most prominent probably being the so-called surface equilibration model. In this contribution, we discuss how surface equilibration can influence orientation in mixed layers, and which other intermolecular interactions have to be considered to explain the observed enhancement of SOP in mixed layers. |
| title | Enhancement of Spontaneous Orientation Polarization in Organic Semiconductor Mixtures |
| topic | Materials Science Applied Physics |
| url | https://arxiv.org/abs/2410.17060 |