Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures
Zhu, T., Yuan, L., Zhao, Y., Zhou, M., Wan, Y., Mei, J., Huang, L.
American Association for the Advancement of Science (AAAS)
Published 2018
American Association for the Advancement of Science (AAAS)
Published 2018
| Publication Date: |
2018-01-13
|
|---|---|
| Publisher: |
American Association for the Advancement of Science (AAAS)
|
| Electronic ISSN: |
2375-2548
|
| Topics: |
Natural Sciences in General
|
| Published by: |
| _version_ | 1839207852582895616 |
|---|---|
| autor | Zhu, T., Yuan, L., Zhao, Y., Zhou, M., Wan, Y., Mei, J., Huang, L. |
| beschreibung | Charge-transfer (CT) excitons at heterointerfaces play a critical role in light to electricity conversion using organic and nanostructured materials. However, how CT excitons migrate at these interfaces is poorly understood. We investigate the formation and transport of CT excitons in two-dimensional WS 2 /tetracene van der Waals heterostructures. Electron and hole transfer occurs on the time scale of a few picoseconds, and emission of interlayer CT excitons with a binding energy of ~0.3 eV has been observed. Transport of the CT excitons is directly measured by transient absorption microscopy, revealing coexistence of delocalized and localized states. Trapping-detrapping dynamics between the delocalized and localized states leads to stretched-exponential photoluminescence decay with an average lifetime of ~2 ns. The delocalized CT excitons are remarkably mobile with a diffusion constant of ~1 cm 2 s –1 . These highly mobile CT excitons could have important implications in achieving efficient charge separation. |
| citation_standardnr | 6138743 |
| datenlieferant | ipn_articles |
| feed_id | 228416 |
| feed_publisher | American Association for the Advancement of Science (AAAS) |
| feed_publisher_url | http://www.aaas.org/ |
| insertion_date | 2018-01-13 |
| journaleissn | 2375-2548 |
| publikationsjahr_anzeige | 2018 |
| publikationsjahr_facette | 2018 |
| publikationsjahr_intervall | 7984:2015-2019 |
| publikationsjahr_sort | 2018 |
| publisher | American Association for the Advancement of Science (AAAS) |
| quelle | Science Advances |
| relation | http://advances.sciencemag.org/cgi/content/short/4/1/eaao3104?rss=1 |
| search_space | articles |
| shingle_author_1 | Zhu, T., Yuan, L., Zhao, Y., Zhou, M., Wan, Y., Mei, J., Huang, L. |
| shingle_author_2 | Zhu, T., Yuan, L., Zhao, Y., Zhou, M., Wan, Y., Mei, J., Huang, L. |
| shingle_author_3 | Zhu, T., Yuan, L., Zhao, Y., Zhou, M., Wan, Y., Mei, J., Huang, L. |
| shingle_author_4 | Zhu, T., Yuan, L., Zhao, Y., Zhou, M., Wan, Y., Mei, J., Huang, L. |
| shingle_catch_all_1 | Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures Charge-transfer (CT) excitons at heterointerfaces play a critical role in light to electricity conversion using organic and nanostructured materials. However, how CT excitons migrate at these interfaces is poorly understood. We investigate the formation and transport of CT excitons in two-dimensional WS 2 /tetracene van der Waals heterostructures. Electron and hole transfer occurs on the time scale of a few picoseconds, and emission of interlayer CT excitons with a binding energy of ~0.3 eV has been observed. Transport of the CT excitons is directly measured by transient absorption microscopy, revealing coexistence of delocalized and localized states. Trapping-detrapping dynamics between the delocalized and localized states leads to stretched-exponential photoluminescence decay with an average lifetime of ~2 ns. The delocalized CT excitons are remarkably mobile with a diffusion constant of ~1 cm 2 s –1 . These highly mobile CT excitons could have important implications in achieving efficient charge separation. Zhu, T., Yuan, L., Zhao, Y., Zhou, M., Wan, Y., Mei, J., Huang, L. American Association for the Advancement of Science (AAAS) 2375-2548 23752548 |
| shingle_catch_all_2 | Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures Charge-transfer (CT) excitons at heterointerfaces play a critical role in light to electricity conversion using organic and nanostructured materials. However, how CT excitons migrate at these interfaces is poorly understood. We investigate the formation and transport of CT excitons in two-dimensional WS 2 /tetracene van der Waals heterostructures. Electron and hole transfer occurs on the time scale of a few picoseconds, and emission of interlayer CT excitons with a binding energy of ~0.3 eV has been observed. Transport of the CT excitons is directly measured by transient absorption microscopy, revealing coexistence of delocalized and localized states. Trapping-detrapping dynamics between the delocalized and localized states leads to stretched-exponential photoluminescence decay with an average lifetime of ~2 ns. The delocalized CT excitons are remarkably mobile with a diffusion constant of ~1 cm 2 s –1 . These highly mobile CT excitons could have important implications in achieving efficient charge separation. Zhu, T., Yuan, L., Zhao, Y., Zhou, M., Wan, Y., Mei, J., Huang, L. American Association for the Advancement of Science (AAAS) 2375-2548 23752548 |
| shingle_catch_all_3 | Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures Charge-transfer (CT) excitons at heterointerfaces play a critical role in light to electricity conversion using organic and nanostructured materials. However, how CT excitons migrate at these interfaces is poorly understood. We investigate the formation and transport of CT excitons in two-dimensional WS 2 /tetracene van der Waals heterostructures. Electron and hole transfer occurs on the time scale of a few picoseconds, and emission of interlayer CT excitons with a binding energy of ~0.3 eV has been observed. Transport of the CT excitons is directly measured by transient absorption microscopy, revealing coexistence of delocalized and localized states. Trapping-detrapping dynamics between the delocalized and localized states leads to stretched-exponential photoluminescence decay with an average lifetime of ~2 ns. The delocalized CT excitons are remarkably mobile with a diffusion constant of ~1 cm 2 s –1 . These highly mobile CT excitons could have important implications in achieving efficient charge separation. Zhu, T., Yuan, L., Zhao, Y., Zhou, M., Wan, Y., Mei, J., Huang, L. American Association for the Advancement of Science (AAAS) 2375-2548 23752548 |
| shingle_catch_all_4 | Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures Charge-transfer (CT) excitons at heterointerfaces play a critical role in light to electricity conversion using organic and nanostructured materials. However, how CT excitons migrate at these interfaces is poorly understood. We investigate the formation and transport of CT excitons in two-dimensional WS 2 /tetracene van der Waals heterostructures. Electron and hole transfer occurs on the time scale of a few picoseconds, and emission of interlayer CT excitons with a binding energy of ~0.3 eV has been observed. Transport of the CT excitons is directly measured by transient absorption microscopy, revealing coexistence of delocalized and localized states. Trapping-detrapping dynamics between the delocalized and localized states leads to stretched-exponential photoluminescence decay with an average lifetime of ~2 ns. The delocalized CT excitons are remarkably mobile with a diffusion constant of ~1 cm 2 s –1 . These highly mobile CT excitons could have important implications in achieving efficient charge separation. Zhu, T., Yuan, L., Zhao, Y., Zhou, M., Wan, Y., Mei, J., Huang, L. American Association for the Advancement of Science (AAAS) 2375-2548 23752548 |
| shingle_title_1 | Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures |
| shingle_title_2 | Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures |
| shingle_title_3 | Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures |
| shingle_title_4 | Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures |
| timestamp | 2025-07-31T23:41:31.071Z |
| titel | Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures |
| titel_suche | Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures |
| topic | TA-TD |
| uid | ipn_articles_6138743 |