Nanoscale transport of surface excitons at the interface between ZnO and a molecular monolayer
| Autor: | Sebastian Friede, Sergei Kuehn, S. Blumstengel, Sergey Sadofev, Fritz Henneberger, Thomas Elsaesser |
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| Rok vydání: | 2015 |
| Předmět: |
J.2
Photoluminescence Materials science Condensed Matter - Mesoscale and Nanoscale Physics Diffusion Exciton FOS: Physical sciences Condensed Matter Physics Molecular physics Spectral line Electronic Optical and Magnetic Materials Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Monolayer Near-field scanning optical microscope Atomic physics Biexciton Envelope (waves) |
| Zdroj: | Physical Review B. 91 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.91.121415 |
| Popis: | Excitons play a key role for the optoelectronic properties of hybrid systems. We apply near-field scanning optical microscopy (NSOM) with a $100\,\text{-nm}$ spatial resolution to study the photoluminescence of surface excitons (SX) in a $20\,\text{nm}$ thick ZnO film capped with a monolayer of stearic acid molecules. Emission from SX, donor-bound (DX), and - at sample temperatures $T>20\,\text{K}$ - free (FX) excitons is separated in steady-state and time-resolved photoluminescence spectra. The $4\,\text{meV}$ broad smooth envelope of SX emission at $T 14 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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