Instituto de Óptica “Daza de Valdés”

SUNLIFE: Boosting Sustainable and Low-Cost Solar Energy for Indoor and Outdoor Use

Fotónica para la Energía y la Sostenibilidad (PEASER), Laser Processing Group (LPG)

  • IO-CSIC leads an international project that will create sustainable solar cells with non-critical and non-toxic materials that can be adapted to all types of surfaces and applications
Madrid / March 4, 2025
The Spanish National Research Council (CSIC), an organisation dependent on the Ministry of Science, Innovation and Universities, is leading an international cooperation project that will develop sustainable, accessible and long-lasting photovoltaic solar cells using non-critical and non-toxic materials. With a budget of 1.7 million euros, SUNLIFE will create modules that can be adapted to any surface and application. “Our technology stands out for its excellent versatility and flexibility compared to other current technologies,” says Raquel Caballero, a CSIC researcher at the Institute of Optics and the project’s main coordinator.
A hand wearing a laboratory glove holds a dark flexible sheet-shaped solar cell
Sample of solar cells developed at SUNLIFE./CSIC.

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“The solar cells we are developing are based on combinations of antimony, sulfur and selenium, which are abundant in the Earth’s crust,” says Caballero. “The resulting materials are very stable and durable and have electro-optical properties that allow these devices to be used in both outdoor and indoor environments and to be placed on practically any surface, so their range of application is very wide,” he adds.

The semi-transparent solar cells developed by SUNLIFE, whose viability has already been proven, can be installed in buildings and infrastructures, in devices on ceramic tiles with the dual function of wall ventilation and energy production, and in flexible mechanisms for integration into the Internet of Things (IoT), which allows everyday items to be connected to a communication network.

“With the forecast of a greater expansion of IoT devices in the near future, indoor photovoltaics will play an important role, as it will allow the use of these devices without depending on batteries, which are less sustainable both due to the materials needed for their manufacture and their short lifespan,” says Caballero. “Today, solar modules are already used for building facades, in agriculture or in IoT, but the ones we are developing can be adapted to all scenarios while maintaining their efficiency, something that most current technologies cannot offer,” he concludes.

Institutions from six countries, including Spain, are participating in the project. In addition to the CSIC, the SUNLIFE consortium includes CSIC, CNRS from France, INL from Portugal, Technical University of Tallinn from Estonia, Università degli Studi di Parma from Italy, Bay Zoltan from Hungary and the Spanish company Nano4Energy.

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Vice-Presidency of International Relations / IO-CSIC Communication
comunicacion@csic.es

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