Efficient White-Light Visible Light Communication With Novel Optical Antennas Based on Luminescent Solar Concentrators

Abstract

Optical Antennas (OAs) based on Fluorescent Concentrators (FCs) promise a revolution in the deployment of Visible Light Communication (VLC) and Optical Wireless Communication (OWC), due to their inherent advantages over conventional receivers in terms of exceedingly larger field of view (FoV) and optical gain (OG). Whilst FC-based OAs have been demonstrated in VLC applications in a wealth of works embedding monochromatic UV and Blue LED sources, a detailed study demonstrating the performances of OA in white-light VLC (WLC) applications, which is at the basis of the deployment of VLC for Internet of Things (IoT), 6G and pervasive networks, is still lacking. In our work we present and test two 50 mm x 50 mm OAs for WLC , based on two of the most effective fluorophores (Lumogen© Red 305 F and DQ1, respectively) used in Luminescent Solar Concentrator (LSC) applications. We perform a detailed characterization of intrinsic and VLC performances, comparing the results with a novel Monte Carlo model accurately describing the photon conversion and propagation processes. Whilst DQ1 represents the most suited solution for high-speed VLC with UV/blue LEDs, our results highlight excellent performances of Lumogen-based OA in white-light settings, outpacing the performances of ordinary photodiode-based receivers. Our results pave the way towards the full-fledged deployment of VLC in IoT applications, where the availability of detectors with large-area, wide FoV and enhanced OG covering the white LEDs emission is a central element.

Pd-Catalyzed Miyaura Borylation and Telescopic Borylation/Suzuki–Miyaura Cross-Coupling Processes in Deep-Eutectic Solvents

“…To explore the possibility of applying the one-pot procedure described above to the synthesis of molecules with proven application in the field of organic electronics and/or photovoltaics, we finally attempted the preparation of two such compounds (Scheme ). The first of them, compound 17 , was originally employed as a strong red emitter in OLEDs and has constituted the progenitor of a series of luminescent materials obtained by intercalation of different conjugated units between the donor TPA and the acceptor benzothiadiazole moieties. − In addition, it can also serve as the precursor for the preparation of the yellow emitter DQ1, whose employment as a fluorophore for high-efficiency luminescent solar concentrators (LSCs) was recently demonstrated. , To synthesize compound 17 , borylation of bromide 1t (Scheme , top) needs to be carried out first. Gratifyingly, when this substrate was subjected to the optimized reaction conditions (as in Table , Entry 1) for a time of 24 h, the corresponding boronic ester 2t was efficiently formed in 93% yield (as determined from the 1 H NMR spectrum of the crude product using nitromethane as an internal standard).…”