Multiorbital exciton formation in an organic semiconductor
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2023
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866917599764283392 |
|---|---|
| author | Bennecke, Wiebke Windischbacher, Andreas Schmitt, David Bange, Jan Philipp Hemm, Ralf Kern, Christian S. D`Avino, Gabriele Blase, Xavier Steil, Daniel Steil, Sabine Aeschlimann, Martin Stadtmueller, Benjamin Reutzel, Marcel Puschnig, Peter Jansen, G. S. Matthijs Mathias, Stefan |
| author_facet | Bennecke, Wiebke Windischbacher, Andreas Schmitt, David Bange, Jan Philipp Hemm, Ralf Kern, Christian S. D`Avino, Gabriele Blase, Xavier Steil, Daniel Steil, Sabine Aeschlimann, Martin Stadtmueller, Benjamin Reutzel, Marcel Puschnig, Peter Jansen, G. S. Matthijs Mathias, Stefan |
| contents | Harnessing the optoelectronic response of organic semiconductors requires a thorough understanding of the fundamental light-matter interaction that is dominated by the excitation of correlated electron-hole pairs, i.e. excitons. The nature of these excitons would be fully captured by knowing the quantum-mechanical wavefunction, which, however, is difficult to access both theoretically and experimentally. Here, we use femtosecond photoemission orbital tomography in combination with many-body perturbation theory to gain access to exciton wavefunctions in organic semiconductors. We find that the coherent sum of multiple electron-hole pair contributions that typically make up a single exciton can be experimentally evidenced by photoelectron spectroscopy. For the prototypical organic semiconductor buckminsterfullerene (C$_{60}$), we show how to disentangle such multiorbital contributions and thereby access key properties of the exciton wavefunctions including localization, charge-transfer character, and ultrafast exciton formation and relaxation dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_13904 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Multiorbital exciton formation in an organic semiconductor Bennecke, Wiebke Windischbacher, Andreas Schmitt, David Bange, Jan Philipp Hemm, Ralf Kern, Christian S. D`Avino, Gabriele Blase, Xavier Steil, Daniel Steil, Sabine Aeschlimann, Martin Stadtmueller, Benjamin Reutzel, Marcel Puschnig, Peter Jansen, G. S. Matthijs Mathias, Stefan Mesoscale and Nanoscale Physics Harnessing the optoelectronic response of organic semiconductors requires a thorough understanding of the fundamental light-matter interaction that is dominated by the excitation of correlated electron-hole pairs, i.e. excitons. The nature of these excitons would be fully captured by knowing the quantum-mechanical wavefunction, which, however, is difficult to access both theoretically and experimentally. Here, we use femtosecond photoemission orbital tomography in combination with many-body perturbation theory to gain access to exciton wavefunctions in organic semiconductors. We find that the coherent sum of multiple electron-hole pair contributions that typically make up a single exciton can be experimentally evidenced by photoelectron spectroscopy. For the prototypical organic semiconductor buckminsterfullerene (C$_{60}$), we show how to disentangle such multiorbital contributions and thereby access key properties of the exciton wavefunctions including localization, charge-transfer character, and ultrafast exciton formation and relaxation dynamics. |
| title | Multiorbital exciton formation in an organic semiconductor |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2303.13904 |