Description
Epishine develops thin, flexible printed organic photovoltaic (OPV) modules engineered specifically to harvest ambient indoor light for consumer electronics and connected sensors. Niklas Forsgren demonstrates how these paper-thin organic cells convert low-lux room illumination into usable electricity, bypassing traditional silicon solar limitations and eliminating disposable battery waste across low-power hardware deployments. Rather than relying on rigid perovskite or standard outdoor solar chemistries, the Sweden-based manufacturer prints flexible organic light harvesters capable of bi-facial light capture, allowing devices such as asset trackers, smart cards, and remote controls to draw energy regardless of orientation. https://www.epishine.com/
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Ambient indoor energy harvesting relies on a balanced tripartite architecture encompassing the primary harvester, specialized power conversion silicon, and an energy buffer. The demonstration integrates Epishine printed OPV modules with an ultra-low-power ambient energy manager PMIC from e-peas and an eco-friendly supercapacitor storage element. Because low-intensity ambient light yields continuous micro-power that cannot directly support peak RF transmission spikes, the system trickles energy into intermediate storage to handle pulse currents during active wireless transmissions.
The featured energy harvesting power management integrated circuit incorporates dual-source harvesting inputs and dynamic Maximum Power Point Tracking (MPPT). System designers can configure the PMIC to track open-circuit voltage or regulate a constant target voltage, adapting impedance matching in real time to fluctuating indoor lighting levels. Regulated voltage rails, quick-charge 5V inputs, and integrated battery charging circuitry allow the hardware to manage disparate storage chemistries including lithium-ion, hybrid capacitors, or bio-based supercapacitors.
Demonstrated live monitoring equipment tracks instantaneous micro-watt power generation, cumulative harvested joules, and simulated load consumption. By comparing the photovoltaic power budget against duty-cycled active loads, developers can calculate whether a wireless design achieves perpetual energy neutrality or operates as a battery-life extender for high-draw products. Hardware teams can alter communication intervals, moving away from constant polling heartbeats to intermittent wake-up routines that gather energy and transmit packets only when sufficient charge accumulates.
Filmed on the exhibition floor at CEATEC 2026, the working prototypes showcase thin-film asset tracking tags, bi-facial remote controls, and environmental IoT sensor boards operating solely on ambient room illumination. Integrating roll-to-roll printed organic photovoltaics with modern power management silicon provides a viable blueprint for eliminating maintenance cycles and toxic disposable cells across commercial building automation and smart retail devices.