1. Industrial-Scale R2R Processing of Perovskite Films:
The LUMINOSITY project has successfully demonstrated the roll-to-roll (R2R) processing of perovskite absorber and charge-selective layers on flexible substrates with the lead of TNO, demonstrating a R2R deposited, R2R encapsulated semi-fabricate of 7500 cm², which is highlighted in a press release. This is a significant leap in upscaling, directly addressing the challenge of translating laboratory-scale processes to industrially relevant dimensions. The R2R slot-die coating was performed under controlled ambient conditions, and the resulting films exhibited high uniformity and quality, as confirmed by advanced characterization techniques (SEM, XRD). This achievement validates the feasibility of large-area, continuous manufacturing for next-generation flexible perovskite photovoltaics, positioning the consortium at the forefront of industrial upscaling.
2. Development and Implementation of Anodic Arc Deposition:
Successful implementation of R2R anodic arc evaporation by FEP for the deposition of functional layers is a breakthrough. This technique enables high-rate, low-damage deposition of buffer and barrier layers, which are critical for device stability and performance. The ability to deposit high-quality layers at industrially relevant speeds and scales represents a major advance over conventional sputtering or evaporation methods, supporting the project’s goals for robust, scalable, and sustainable manufacturing. Next step is to demonstrate the R2R deposition.
3. In-Situ X-Ray Metrology and Process Understanding:
Lund University played an important role by developing advanced in-situ X-ray metrology to study the crystallization and film formation of perovskite layers in a R2R process setting, attached to their MAX-IV synchrotron radiation facility. LU’s work will enabled real-time, multimodal analysis of solvent removal, nucleation, and growth dynamics, providing deep insights into process optimization for large-area coatings.
4. Stability Under Accelerated Stress Tests:
TNO’s stability testing of perovskite devices stands out as a key achievement. Devices fabricated with environmentally friendly, DMSO-based inks and processed via scalable techniques were subjected to rigorous thermal and light-soaking stress tests. Results showed that non-encapsulated devices maintained a power conversion efficiency (PCE) 13% after 2500–3000 hours at 85–100°C, and encapsulated devices retained over 90% of their initial PCE after 1680 hours of combined light and temperature stress. These results provide strong evidence for the long-term durability and reliability of the developed perovskite technology, meeting and exceeding state of the art results reported on perovskite solar cell development.
