SAMOP 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 10: Photonics I
Q 10.7: Vortrag
Montag, 6. März 2023, 18:45–19:00, E001
Optimization of photonic multilayer structures to increase upconversion efficiency — •Fabian Spallek1,2, Stefan Yoshi Buhmann2, Thomas Wellens1, and Andreas Buchleitner1,3 — 1Physikalisches Institut, Albert-Ludwigs-Universität Freiburg — 2Institut für Physik, Universität Kassel — 3EUCOR Centre for Quantum Science and Quantum Computing, Albert-Ludwigs-Universität Freiburg
The efficiency of solar silicon solar cells can be substantially improved by widening the spectral operating window by means of upconversion materials [1]. These convert two low-energy photons into one photon with higher energy [1]. Embedding the upconverter material in photonic dielectric nanostructures allows to influence the interplay of absorption and emission rates, energy transfer processes, local irradiance and local density of (photonic) states which in turn determines the overall efficiency.
We utilize methods from macroscopic quantum electrodynamics to calculate the influence of multilayer nanostructures on spontaneous emission and absorption rates in the upconverter. This allows us to propose specific designs optimized for upconversion efficiency [2]. Lastly, we take into account manufacturing errors and compare indicators for the achievable upconversion luminescence and quantum yield of our optimized design to existing, experimentally implemented Bragg structures.
[1] C. L. M. Hofmann et al., Nat. Commun. 12, 14895 (2021)
[2] F. Spallek et al., J. Phys. B: At. Mol. Opt. Phys. 50, 214005 (2017)