ynvisible’s displays were used in a study conducted by Tampere University of Technology and VTT Technical Research Centre of Finland, titled: “Behaviour of one-step spray-coated carbon nanotube supercapacitor in ambient light harvester circuit with printed organic solar cell and electrochromic display”. The study reports a printed energy harvesting (organic photovoltaic module) and storage circuit (supercapacitor made of spray-coated carbon nanotube based ink) powered by ambient office lighting, and its use to power a printed electrochromic display. The supercapacitor was charged using the organic photovoltaic module, and its charging rate, self-discharge rate and display operation were studied in detail. The fully charged supercapacitor was used as a power source to run the electrochromic display over 50 times.
From: Behaviour of one-step spray-coated carbon nanotube supercapacitor in ambient light harvester circuit with printed organic solar cell and electrochromic display
(a) The circuit used for the supercapacitor (SC) charging with the organic photovoltaic (OPV) module. Photographs of the (b) OPV module and (c) SC device. (d) The circuit used for the electrochromic display (ECD) operation powered by the charged SC. (e) Photographs of the ECD element and the comparison of its ON and OFF states (see Supplementary information Fig. S2).
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