Design and Characterization of a 53.5% Efﬁcient GalliumIndium Phosphide-Based Optical Photovoltaic Converterunder 637 nm Laser Irradiation at 10 W cm-2

Sanmartín, PabloFernández, Eduardo F.García Loureiro, Antonio JesúsMontes-Romero, JesúsCano, AitanaMartín, PabloRey-Stolle, IgnacioGarcía, IvánAlmonacid, Florencia2025-06-202025-06-202024-06-14Sanmartín, P., Fernández, E.F., García-Loureiro, A., Montes-Romero, J., Cano, A., Martín, P., Rey-Stolle, I., García, I. and Almonacid, F. (2024). Design and Characterization of a 53.5% Efficient Gallium Indium Phosphide-Based Optical Photovoltaic Converter under 637 nm Laser Irradiation at 10 W cm−2. "Solar RRL", vol. 8, n. 152367-198Xhttps://hdl.handle.net/10347/42209High-power optical transmission (HPOT) technology has emerged as a promising alternative among far-field wireless power transmission approaches, enabling the transfer of kilowatts of power over kilometer-scale distances. Its exceptional adaptability allows operation in challenging scenarios where traditional electrical wiring is impractical or unfeasible, thereby opening up a vast array of potential applications previously considered utopian. An important pending assignment in enhancing the performance of laser-based HPOT systems is achieving efficient photovoltaic conversion of high power densities (≥10 W cm−2). In this sense, there is a pressing need for the advancement of optical photovoltaic converters (OPCs) capable of enduring intense monochromatic irradiances. This work presents the design optimization, manufacturing, and characterization processes of a gallium indium phosphide (GaInP)-based OPC under varying 637 nm laser power at room temperature. In addition, methods to evaluate the impact of temperature on performance are provided. The findings reveal a maximum efficiency of 53.5% at 10 W cm−2, surpassing literature results for GaInP converters by over 9%abs at those light intensities. Remarkably, this device withstands unmatched irradiances within GaInP OPCs up to 60 W cm−2, maintaining 42.3% efficiency. This study aims to push forward the development of wide-bandgap power converters with recordbreaking efficiencies paving the way for new applications.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/High-power optical transmissionOptical Photovoltaic ConverterGallium Indium Phosphide-BasedDesign and Characterization of a 53.5% Efﬁcient GalliumIndium Phosphide-Based Optical Photovoltaic Converterunder 637 nm Laser Irradiation at 10 W cm-2journal article10.1002/solr.202400278open access