Details
| Original language | English |
|---|---|
| Pages (from-to) | 4577-4583 |
| Number of pages | 7 |
| Journal | Nano letters |
| Volume | 21 |
| Issue number | 11 |
| Publication status | Published - 9 Jun 2021 |
| Externally published | Yes |
Abstract
Light sources on the scale of single molecules can be addressed and characterized at their proper sub-nanometer scale by scanning tunneling microscopy-induced luminescence (STML). Such a source can be driven by defined short charge pulses while the luminescence is detected with sub-nanosecond resolution. We introduce an approach to concurrently image the molecular emitter, which is based on an individual defect, with its local environment along with its luminescence dynamics at a resolution of a billion frames per second. The observed dynamics can be assigned to the single electron capture occurring in the low-nanosecond regime. While the emitter's location on the surface remains fixed, the scanning of the tip modifies the energy landscape for charge injection into the defect. The principle of measurement is extendable to fundamental processes beyond charge transfer, like exciton diffusion.
Keywords
- charge dynamics, charge injection, nanosecond imaging, Scanning tunneling microscopy-induced luminescence
ASJC Scopus subject areas
- Chemical Engineering(all)
- Bioengineering
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanical Engineering
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In: Nano letters, Vol. 21, No. 11, 09.06.2021, p. 4577-4583.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Gigahertz Frame Rate Imaging of Charge-Injection Dynamics in a Molecular Light Source
AU - Rosławska, Anna
AU - Merino, Pablo
AU - Leon, Christopher C.
AU - Grewal, Abhishek
AU - Etzkorn, Markus
AU - Kuhnke, Klaus
AU - Kern, Klaus
N1 - Funding information: We would like to thank O. Gunnarsson and G. Schull for fruitful discussions. A. Ros?awska acknowledges support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement 771850) and the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement 894434. P. Merino acknowledges support from the A.v. Humboldt Foundation, the ERC Synergy Program (grant ERC-2013-SYG-610256, Nanocosmos), Spanish MINECO (MAT2017-85089-C2-1-R), and the “Comunidad de Madrid” for its support to the FotoArt-CM Project S2018/NMT-4367 through the Program of R&D activities between research groups in Technologies 2013, cofinanced by European Structural Funds.
PY - 2021/6/9
Y1 - 2021/6/9
N2 - Light sources on the scale of single molecules can be addressed and characterized at their proper sub-nanometer scale by scanning tunneling microscopy-induced luminescence (STML). Such a source can be driven by defined short charge pulses while the luminescence is detected with sub-nanosecond resolution. We introduce an approach to concurrently image the molecular emitter, which is based on an individual defect, with its local environment along with its luminescence dynamics at a resolution of a billion frames per second. The observed dynamics can be assigned to the single electron capture occurring in the low-nanosecond regime. While the emitter's location on the surface remains fixed, the scanning of the tip modifies the energy landscape for charge injection into the defect. The principle of measurement is extendable to fundamental processes beyond charge transfer, like exciton diffusion.
AB - Light sources on the scale of single molecules can be addressed and characterized at their proper sub-nanometer scale by scanning tunneling microscopy-induced luminescence (STML). Such a source can be driven by defined short charge pulses while the luminescence is detected with sub-nanosecond resolution. We introduce an approach to concurrently image the molecular emitter, which is based on an individual defect, with its local environment along with its luminescence dynamics at a resolution of a billion frames per second. The observed dynamics can be assigned to the single electron capture occurring in the low-nanosecond regime. While the emitter's location on the surface remains fixed, the scanning of the tip modifies the energy landscape for charge injection into the defect. The principle of measurement is extendable to fundamental processes beyond charge transfer, like exciton diffusion.
KW - charge dynamics
KW - charge injection
KW - nanosecond imaging
KW - Scanning tunneling microscopy-induced luminescence
UR - http://www.scopus.com/inward/record.url?scp=85108021456&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.1c00328
DO - 10.1021/acs.nanolett.1c00328
M3 - Article
C2 - 34038142
AN - SCOPUS:85108021456
VL - 21
SP - 4577
EP - 4583
JO - Nano letters
JF - Nano letters
SN - 1530-6984
IS - 11
ER -