Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.488
Publication date: 16th December 2024
The conceptual idea of the integration of energy photovoltaic (PV) generation and storage systems in a single unit, the photocapacitor, offers an innovative approach to manage energy supply for IoT systems that typically requite low power and work under discontinuous illumination, improving the system performance, reducing device size and weight. Several photovoltaic technologies (Silicon, Dye Sensitized, Organic and Perovskite solar cless) and type of supercapacitor have been integrated in four, four, three and two terminal photocapacitor, leading so far to a maximum device efficiency of 25% for a perovskite based photocapacitor measured under 1 sun illumination [1].
In this presentation I will introduce the concept of photocapacitor, highlighting the working principles, the characteristic features and potentiality of this type of device. I will then show our work on the realization of perovskite based photocapacitors both on rigid and on flexible substrates.
In particular I will report on the all printed three-terminal photocapacitor based on carbon perovskite solar cell (CPSC) integrated with an MXene-based in plane microsupercapacitor (MSC) realized on glass substrate. The device was characterized both under 1 sun and at 1000 lux illumination achieving an overall efficiency of 3.8% with a striking 99% coulombic efficiency and 87% capacitance retention over 6000 cycles for the supercapacitor unit.
I will then show the integrated two terminal flexible photocapacitor, where a flexible perovskite solar module was integrated with flexible interdigitated supercapacitors interconnected in parallel and series with peak overall and storage efficiencies of 2.8% and 23% respectively. Finally I will show some applications of those devices [2].
2. HJ Lomeri et al. Adv. Funct. Mater. 2024, 34, 2313267
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