Publication date: 22nd July 2026
The Power Conversion Efficiency (PCE) of Organic Photovoltaics (OPV) has recently crossed the 20% milestone, placing an even larger focus on module stability, scale-up and integration into desired applications, e.g. for Building-Integrated (BIPV) or Building-Applied (BAPV) Photovoltaics. In this presentation, recent work on scalable OPV cells and modules will be presented, having a focus on Roll-to-Roll (R2R) techniques for development of scalable modules at ambient air conditions [1,2]. We demonstrate ambient air slot-die coated OPV devices reaching above 15% PCE on cell and 13% PCE on module level, as well as a new device architecture facilitating >13% PCE for ITO-free devices manufactured using solely R2R processing techniques. Stability assessment is done using ISOS protocols to shed light on the degradation processes taking place in the OPV cells and modules. The results point at interface related degradation being dominant in these OPV devices, and routes to minimize such degradation effects, at the end leading to long device lifetimes, will here be discussed in more detail [3].
Furthermore, OPV designed and developed for different specific BIPV and BAPV applications will be discussed. This is specifically development of transparent tandem photovoltaics (TPV) for window applications, developed as part CITYSOLAR project, and design and development of structural colored PV modules for the built environment, developed as part of the ColourFoil project [4]. This is achieved through the development and integration of Distributed Bragg Reflector (DBR) stacks for light management, which is utilized to tune light transmittance and reflectance in the PV modules at specific wavelength regions, to optimize for performance and/or aesthetic appearance. These DBR stacks are developed from sputtered oxide layers ensuring low surface roughness and low optical loss, and scale-up of such oxide stacks using Roll-to-Roll (R2R) processing techniques will also be demonstrated, to connect to industrial compatible manufacturing techniques and use-cases in the end.
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