Project Description

Perovskite semiconductors have generated great interest in photovoltaics research as they promise to enable the production of solar cells that are at the same time extremely efficient and very low cost. The main goal of the CHEOPS project is to explore this potential by developing materials and production processes for both upscaling the technology and producing solar cells in a tandem configuration. This implies that a perovskite cell is joined with a ‘conventional’ crystalline silicon cell. Such tandem cells are currently expected to have the best chances to succeed on the photovoltaics market because their production could most likely be integrated into existing manufacturing processes and equipment. In order to achieve its ambitious goals, CHEOPS unites a team of European leaders in academic and industrial perovskite research. The CHEOPS project results are presented in a number of prominent scientific journals including Nature Materials.


The aim of CHEOPS is to develop very low-cost but highly performing photovoltaic devices based on the emerging perovskite technology. At lab scale energy conversion by perovskite devices was rapidly advanced to efficiencies exceeding 20%. But only few attempts at upscaling have been made, yielding significantly reduced efficiencies below 9%. In addition, questions about material stability and reliable measurement procedures are still under discussion.

CHEOPS will now scale up the lab results to modules manufactured in a pre-production environment while maintaining high efficiencies (above 14% stable efficiency in modules of at least 15x15cm2). As the production processes will be designed for large volume production at very low-cost, this will demonstrate the potential of perovskite cells as a technology well suited for building-integrated photovoltaics.

At the same time, CHEOPS will develop materials and processes to achieve very high efficiency (exceeding 29% on 2x2cm2 cells) at low cost using a tandem configuration with a crystalline silicon heterojunction cell.

The CHEOPS consortium will also perform a sustainability assessment from a life-cycle perspective to anticipate potential risks for the technology (including business, technological, environmental, social & political risks). They will establish a quantified future development roadmap as well as protocols for stability testing and for reliable measurements.

In summary, CHEOPS will decisively advance the potentially game-changing perovskite technology towards the market and will thus help to face the energy challenge in Europe and beyond.

Project Details

Centre Suisse d’Electronique et de Microtechnique, CH
accelopment AG, CH
École polytechnique fédérale de Lausanne, CH
Fraunhofer Institute for Applied Polymer Research, DE
Institut National de l’Environnement et des Risques, FR
Merck KGaA, DE
Oxford Photovoltaics Ltd., UK
SmartGreenScans, NL
Tyndall Nationall Institute, IE
University of Oxford, UK
Università di Roma Tor Vergata, IT
University of Salford, UK
01.02.2016 - 31.01.2019
5 million euro
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Funding Programme: 
  • H2020-LCE-2015-1
Renewable Energies