Researchers at the University of Rome Tor Vergata's Centre for Hybrid and Organic Solar Energy (CHOSE), in collaboration with Poland-based Saule Technologies, have demonstrated a large-area flexible perovskite solar module with a fully scalable deposition technique.

Stable perovskite solar module on a flexible substrate image

The results show the optimization of PTTA and perovskite layer deposition by blade-coating, with the final fabrication of a flexible perovskite module with a PCE of 10.51% over 15.7 cm2, showing outstanding light stability of FPSM with a T80′ of 730 h and a recovery efficiency in the dark showing a T80″ of 1560 h, the most stable in the literature reported so far.

The use of techniques that can be scaled-up, such as a blade-coating process, opens a feasible path to further increase the stability of flexible modules while keeping this technology repeatable, cheaper, and suitable for flexible solar panel technology. In this recent work, the researchers developed a deposition strategy by varying the solvent system, concentration, and blade parameters for both the PTAA and perovskite layer.

The researchers believe that a light/dark cycle test, such as ISOS-LC standards, could be integrated to understand and study the recovery process of the devices under dark conditions, simulating the night and day shifts.



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