Enhancing Light-Harvesting with Luminescent Waveguide-Encoded Lattices

Enhancing Light-Harvesting with Luminescent Waveguide-Encoded LatticesRachel Evans a, Takashi Lawson a, Helen Tunstall-Garcia a, Kathryn Benincasa b, Kalaichelvi Saravanamuttu ba Department of Materials Science and Metallurgy, University of Cambridge; Cambridge, UKb Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, Ontario L8S 4M1, CanadaMaterials for Sustainable Development Conference (MATSUS)Proceedings of MATSUS Spring 2024 Conference (MATSUS24)#ProMatSol - Exploring Material Properties for Advanced Solar Energy ApplicationsBarcelona, Spain, 2024 March 4th - 8thOrganizers: Marina Freitag and Elizabeth GibsonInvited Speaker, Rachel Evans, presentation 368DOI: https://doi.org/10.29363/nanoge.matsus.2024.368Publication date: 18th December 2023The Internet of Things (IoT) underpins our future smart world where various electronic devices will be integrated with, and controlled by, wireless communication.[1] Many of these devices will be standalone or portable, creating an urgent demand for off-grid power sources. Solar photovoltaic (PV) cells are viable alternatives to batteries as perpetual power sources for IoT devices. However, crystalline silicon (c-Si) PV cells (which currently account for 95% of the global PV market) are not designed to work with diffuse, artificial indoor light-emitting diode (LED) lighting and perform poorly under these conditions.[2] Luminescent waveguide-encoded lattices (LWELs) are a new class of photonic material that have recently been proposed to compensate for the limitations of c-Si PV cells for indoor PV.[3,4] LWELs consist of a thin (ca. 1 mm) luminescent polymer film encoded with a patterned array of discrete waveguides. The waveguide array is formed through the self-trapping of incident beams of light within a photopolymerisable matrix. This leads to the permanent inscription of polychromatic cylindrical waveguide channels within the polymer matrix, which impart LWELs with an exceptionally wide field-of-view (80% enhancement shown previously[5]). The LWEL is retrofitted to the top surface of a PV cell to enhance light collection. While the optical and materials properties of non-emissive WELs are reasonably well-understood [5,6], the inclusion of a luminophore can complicate the self-trapping processes that led formation of the waveguide channels. In this talk, the relationship between the photopolymerization kinetics, materials composition and optical properties of LWELs will be discussed, with a view to understanding the design rules that underpin efficient performance upon integration with PV cells. References:[1] V. Pecunia, L. G. Occhipinti and R. L. Z. Hoye, Emerging Indoor Photovoltaic Technologies for Sustainable Internet of Things, Adv Energy Mater, 2021, 11, 2100698.[2] V. Bahrami-Yekta and T. Tiedje, Limiting efficiency of indoor silicon photovoltaic devices, Opt. Express, 2018, 26, 28238–28248.[3] N. Ding and I. D. Hosein, Fluorescent Waveguide Lattices for Enhanced Light Harvesting and Solar Cell Performance, ACS Appl. Energy Mater. 2023, 6, 6646−6655[4] H. Lin, I. D. Hosein, K. A. Benincasa and K. Saravanamuttu, A Slim Polymer Film with a Seamless Panoramic Field of View: The Radially Distributed Waveguide Encoded Lattice (RDWEL), Adv Opt Mater, 2019, 7, 1801091.[5] I. D. Hosein, H. Lin, M. R. Ponte, D. K. Basker, M. A. Brook and K. Saravanamuttu, Waveguide Encoded Lattices (WELs): Slim Polymer Films with Panoramic Fields of View (FOV) and Multiple Imaging Functionality, Adv Funct Mater, 2017, 27, 1702242.Acknowledgements: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), the EPSRC (Grant EP/V048953/1) and the Isaac Newton Trust. © FUNDACIO DE LA COMUNITAT VALENCIANA SCITOnanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. 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