The transition to renewable energy is essential in addressing climate change, and organic photovoltaics (OPVs) offer a promising alternative due to their lightweight, flexible, and semi-transparent properties. These unique features enable their integration into unconventional applications, such as building facades, wearable electronics, and greenhouses. However, their widespread adoption has been hindered by challenges related to efficiency, long-term stability, and scalable fabrication. The IDEAL project directly tackled these limitations by developing high-performance OPV materials and modules through combinatorial screening and advanced characterization techniques.
A key focus of the project was sustainable energy generation, with an emphasis on creating low-cost, eco-friendly solar cells suitable for integration in both urban environments and agricultural settings. In particular, OPV modules were designed and tested for greenhouse applications, where they needed to balance energy production with light transmission requirements for plant growth. Optical modeling and greenhouse field tests were performed to ensure that the materials met these dual needs. The project also investigated agrivoltaic stability by deploying OPV modules in real-world greenhouse conditions, identifying degradation modes such as delamination that were not observable under laboratory testing.
Beyond agrivoltaics, the project explored material innovation by discovering and optimizing organic semiconductors for broader optoelectronic applications. This included the development of high molecular weight donor polymers, which improved both efficiency and thermal stability, as well as non-fullerene acceptors (NFAs) with extended electron-deficient cores to enhance charge transport and light absorption. Additionally, the project investigated chiral organic materials, revealing how molecular organization at the nanoscale affects their optoelectronic properties, opening new avenues for polarization-sensitive photodetectors and advanced organic electronics. Furthermore, low-bandgap polymers with near-infrared absorption were designed and tested for thermoelectric applications, demonstrating their potential in energy harvesting beyond photovoltaics.
To accelerate material discovery and device optimization, the project leveraged AI-driven analysis and high-throughput screening techniques. These approaches significantly reduced the time required to identify promising OPV formulations while ensuring that the materials maintained stability under real-world conditions. Scalability was also addressed, with the development of processing strategies that enabled the fabrication of OPV modules exceeding 25 cm² under ambient conditions—an essential step toward industrial-scale production.
Finally, real-world demonstrators showcased the potential of OPVs in practical applications, including their integration into greenhouses and energy-harvesting systems for the Internet of Things (IoT). By addressing both material-level challenges and real-world implementation barriers, the IDEAL project contributed to the advancement of OPVs as a viable and sustainable energy solution. These efforts pave the way for the next generation of organic solar cells, bringing us closer to a cleaner and more sustainable energy future.
