RT Journal Article T1 Design and Characterization of a 53.5% Efficient GalliumIndium Phosphide-Based Optical Photovoltaic Converterunder 637 nm Laser Irradiation at 10 W cm-2 A1 Sanmartín, Pablo A1 Fernández, Eduardo F. A1 García Loureiro, Antonio Jesús A1 Montes-Romero, Jesús A1 Cano, Aitana A1 Martín, Pablo A1 Rey-Stolle, Ignacio A1 García, Iván A1 Almonacid, Florencia K1 High-power optical transmission K1 Optical Photovoltaic Converter K1 Gallium Indium Phosphide-Based AB High-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. PB Wiley SN 2367-198X YR 2024 FD 2024-06-14 LK https://hdl.handle.net/10347/42209 UL https://hdl.handle.net/10347/42209 LA eng NO Sanmartín, 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. 15 NO This work was partially funded by the project “UltraMicroCPV” (MICINN-Agencia Estatal de Investigación: PID2019-106497RB-I00/ AEI /10.13039/501100011033) and by the project NACe-CPV/TE (Junta de Andalucía,PAIDI 2020: P18-RT-1595). E.F.F. thanks the Spanish Ministry ofScience, Innovation and Universities because of the Ramón y Cajal2017 fellowships (RYC-2017-2191). The authors thank Luis Cifuentes,Jesús Bautista, and Manuel Abuin for technical assistance during deviceprocessing. This work was partially supported by the Grant PID2021-123530OB-I00 funded by Ministerio de Ciencia e Innovación (MCIN/AEI/10.13039/501 100 011 033), the epitaxy runs reported in this articlewere carried out in a metal-organic vapor-phase epitaxy reactor retrofittedwith project RENOAIX200 (grant no. EQC2019-005701-P) funded also bySpanish MCIN/AEI (AEI/10.13039/501 100 011 033) and FEDER “Unamanera de hacer Europa”. Part of the equipment used in this researchfor solar cell manufacturing was acquired through project LABCELL30[(grant no. EQC2021-006851-P) with funding from the SpanishMinisterio de Ciencia e Innovación/Agencia Estatal de Investigación(MCIN/AEI 10.13039/501 100 011 033) and the European Union “NextGeneration EU"/PRTR”, European Regional Development Fund (ERDF)“A way to make Europe” and by the Universidad Politécnica de Madridthrough “Ayudas para la cofinanciación de infraestructuras de I þ D þ I(Programa Propio).” DS Minerva RD 28 abr 2026