Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
Publication date: 20th April 2022
The rapid development of the Internet of Things (IoTs) demands self-powered indoor devices to supply continuous power. Since these devices are working independently, self-powered technology in indoor conditions such as indoor photovoltaics has received much attention. At the same time, energy storage devices used should be connected with solar cells to solve the problem of the imbalance between solar output and energy demand. The development of perovskite solar cells (PSCs) has attracted worldwide attention and become one of the best choices for indoor solar energy applications. As a result, the design of a perovskite-supercapacitor pack capable to generate continuous power under indoor light would constitute a significant advance toward energy transition [1].
In this study, three types of solar cells, crystalline Si-SCs, DSCs, and PSCs were selected and a comparative evaluation of photo-storage efficiencies was examined in the range of different light intensities to evaluate the suitable combination for future use in a self-powered indoor device. Non-volatile (ionic liquid electrolyte), high working potential range (up to 3.5 V), and biomass carbon (1998 m2 g-1)-based high-performance (92.1 W h kg−1, 2046.9 W kg−1) supercapacitors were prepared as reported recently by our group [2] and connected with the solar cells. The characterization of the photo-storage device started from the evaluation of solar cell performances using I-V curves and maximum power point tracking technique. After clarification of the active area, the solar cells were able to deliver the same power and the solar cells were connected to the supercapacitor using either DC-DC converter or direct connections. Among the solar cells, a single PSC was able to show better power delivery efficiencies and supply the required minimum operating voltage for the DC-DC boost converter at low light intensities where two series solar cells are required for other solar cells. Moreover, high efficiencies obtained at high discharge current provide the potential for our PSC-supercapacitor system to be used in high-power electronic applications.
This work benefited from State assistance managed by the National Research Agency under the “Programme d’Investissements d’Avenir” (ANR-19-MPGA-0006), supported by ELORPrintTec ANR-10-EQPX-28-01, and the New Energy and Industrial Technology Development Organization (NEDO) PV R&D programs. The authors would like to acknowledge NextPV a CNRS and RCAST/University Tokyo collaboration.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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