Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.258
Publication date: 16th December 2024
Tackling the global energy crisis demands the seamless integration of energy harvesting, conversion, and storage systems into a unified module. Such systems mitigate the inconsistencies of renewable energy sources, making them ideal for portable optoelectronic devices operating in both outdoor and indoor lighting conditions. [1-2] In this study, we present an innovative approach by integrating a carbon perovskite solar cell (CPSC) with an MXene-based in-plane microsupercapacitor (MSC) on a single substrate. The three-terminal device, constructed on a glass/indium tin oxide (glass/ITO) substrate, features a shared terminal between the MSC and the solar cell, alongside two dedicated terminals for individual components. The MXene-based MSC was developed using blade-coating of water-processed Ti₃C₂Tₓ MXene ink onto the substrate, followed by laser scribing to form an interdigitated in-plane structure. This MSC achieved a capacitance of 16 mF/cm² at a current density of 0.08 mA/cm² and exhibited impressive durability, retaining 86% of its capacitance and delivering a coulombic efficiency of 96% after 6,000 charge-discharge cycles. The photovoltaic component demonstrated a conversion efficiency of 7.11% under standard sunlight conditions (1 sun) and 22.6% under indoor lighting at 1000 lx. The integrated device showcased exceptional performance across varying light environments, achieving an overall efficiency of 3.8% and a storage efficiency of 59.1%. This breakthrough photosupercapacitor represents a significant step forward for portable optoelectronic devices, paving the way for advanced solutions in energy storage and conversion technologies.
This work was supported by the European H2020 project, “Wearable Applications enabled by electronic Systems on Paper (WASP)” (grant no. 825213), the project “SmArt Designed Full Printed Flexible RObust Efficient Organic HaLide PerOvskite solar cells” APOLO (grant no. 763989) and the project “Energy harvesting in cities with transparent and highly efficient window-integrated multi-junction solar cells” (grant no. 101007084). The authors also gratefully acknowledge the financial support of Lazio Region through ISIS@MACH (IR approved by Giunta Regionale n. G10795, 7 August 2019 published on BURL n. 69, 27 August 2019) and the project IGEA-A0613-2023-078007. A. Patra acknowledges the MAECI (Ministero degli Affari Esteri e della Cooperazione Internazionale) Fellowship 2022-2023 “2D material for micro supercapacitor and photosupercapacitor application”.
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