Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.311
Publication date: 18th July 2023
Light is ubiquitous in the urban environment – from the sun that shines down upon us to the artificial sources that light-up our devices and homes. While some of this light is used very effectively, for example by plants in the process of photosynthesis, much is wasted, either due to inefficient capture or poor recycling of the broad spectrum of photon energies available. Photon conversion materials can help bridge the energy mismatch between a light source and the collector (e.g. a solar photovoltaic (PV) cell or fibre optic) through use of a photoluminescence process to convert the incident photon energy.[1] For ease of processing and eventual integration with (opto)electronic devices, the photon converter must usually be integrated within a solid-state host. Judicious consideration of the host material is essential to ensure that host-emitter interactions enhance rather than diminish the optical performance.
In this talk, recent highlights from our research into the bottom-up design of photon conversion materials utilising organic-inorganic hybrid hosts will be presented. It will be shown that materials chemistry strategies can be used to control the packing, orientation and placement of emitters, which provides a means of modulating the optical properties – from enhanced photoluminescence quantum yields[2], to tunable photon energies via Förster resonance energy transfer[3,4] or triplet-triplet annihilation upconversion (TTA-UC). These characteristics can be exploited to improve light-harvesting and trapping, which can be used to develop highly efficient luminescent solar concentrators,[4] optical amplifiers for visible light communications[5], and sensor platforms for bioimaging.
This work was funded by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 818762: SPECTRACON) and the Engineering and Physical Sciences Research Council (Grant No. EP/V048953/1).
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