期刊
NATURE COMMUNICATIONS
卷 12, 期 1, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/s41467-020-20305-x
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资金
- Baden-Wurttemberg Ministry of Science, Research and Arts
- Baden-Wurttemberg Ministry of Finance and Economy
- Fraunhofer-Gesellschaft in Munich in the project NaLuWiLeS: Nano-Strukturen zur Lumineszenzverstarkung fur die Wirkungsgradsteigerung von LEDs und Solarzellen by the Sustainability Center Freiburg
- Heinrich-Boll Stiftung
- German Research Foundation (DFG) [FI 2042/1-1]
- Innovation Fund Denmark through the SunTune project
- Helmholtz Association: professorial recruitment initiative
- Helmholtz Association: Helmholtz Energy Materials Foundry (HEMF)
- Helmholtz Association: Science & Technology of Nanosystems (STN) research program
An experimental validation of the effects of photonic structures on upconversion, and the proposal of a theoretical model to describe these effects, have opened up new possibilities for optimizing photonic structure designs.
Photonic structures can be designed to tailor luminescence properties of materials, which becomes particularly interesting for non-linear phenomena, such as photon upconversion. However, there is no adequate theoretical framework to optimize photonic structure designs for upconversion enhancement. Here, we present a comprehensive theoretical model describing photonic effects on upconversion and confirm the model's predictions by experimental realization of 1D-photonic upconverter devices with large statistics and parameter scans. The measured upconversion photoluminescence enhancement reaches 8224% of the simulated enhancement, in the mean of 2480 separate measurements, scanning the irradiance and the excitation wavelength on 40 different sample designs. Additionally, the trends expected from the modeled interaction of photonic energy density enhancement, local density of optical states and internal upconversion dynamics, are clearly validated in all experimentally performed parameter scans. Our simulation tool now opens the possibility of precisely designing photonic structure designs for various upconverting materials and applications.
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