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Self-Powered e-Skin Based on Integrated Flexible Organic Photovoltaics and Transparent Touch Sensors

Nair, NM and Shakthivel, D and Panidhara, KM and Adiga, V and Ramamurthy, PC and Dahiya, R (2023) Self-Powered e-Skin Based on Integrated Flexible Organic Photovoltaics and Transparent Touch Sensors. In: Advanced Intelligent Systems, 5 (10).

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Official URL: https://doi.org/10.1002/aisy.202300103


There is a growing interest in the large area, lightweight, low-power electronic skin (e-Skin), consisting of a multitude of sensors over conformable surfaces. The use of multifunctional sensors is always challenging, especially when their energy requirements are considered. Herein, the heterogeneous integration of custom-made flexible organic photovoltaic (OPV) cells is demonstrated with a large area touch sensor array. The OPV can offer power density of more than 0.32 μW cm−2 at 1500 lux, which is sufficient to meet the instantaneous demand of the array of touch sensors. In addition to energy harvesting, it is shown that the OPVs can perform shadow sensing for proximity and gesture recognition, which are crucial features needed in the e-Skin, particularly for safe interaction in the industrial domain. Along with pressure sensing (sensitivity of up to 0.26 kPa−1 in the range of 1–10 kPa) and spatial information, the touch sensors made of indium tin oxide and monolayer graphene have shown >70% transparency, which allow light to pass through them to reach the bottom OPV layer. With better resource management and space utilization, the presented stacked integration of transparent touch-sensing layer and OPVs can evolve into a futuristic energy-autonomous e-Skin that can “see” and “feel.”. © 2023 The Authors. Advanced Intelligent Systems published by Wiley-VCH GmbH.

Item Type: Journal Article
Publication: Advanced Intelligent Systems
Publisher: John Wiley and Sons Inc
Additional Information: The copyright for this article belongs to the Authors.
Keywords: Contact sensors; Energy harvesting; Graphene; Indium compounds; Intelligent systems; Tactile sensors; Tin oxides, Electronic skin; Indium tin oxide; Low-power electronics; Multifunctional sensors; Organic photovoltaics; Self-powered; Touch sensing; Touch sensors; Transparent electronics, Flexible electronics
Department/Centre: Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 05 Dec 2023 09:23
Last Modified: 05 Dec 2023 09:23
URI: https://eprints.iisc.ac.in/id/eprint/83395

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