Publication date: 17th February 2025
Perovskite solar cells (PSCs) have rapidly progressed among emerging photovoltaic (PV) technologies, evolving from proof-of-concept devices to high-performance modules within a decade[1]. Their key advantages are high defect tolerance, high absorption coefficient, and low-cost solution-processed fabrication techniques. These enabled roll-to-roll (R2R) manufacturing of PSCs, offering a pathway to scalable and high-throughput production. However, progress has primarily focused on planar architectures, which introduces fabrication complexity that limits scalability. For instance, transparent conductive oxides are comprised of rare elements such as indium, introducing a high risk in the photovoltaics supply chain [2].
We introduce Power Roll’s innovative microgroove-based architecture, a breakthrough designed to fully exploit R2R manufacturing. This approach employs a flexible substrate embossed with micro-grooves, enabling selective deposition of charge transport layers on the opposite groove faces and concomitant cell interconnection into modules [3]. This design simplifies manufacturing by eliminating the need for conventional transparent conductive oxides and multi-step scribing, enabling the production of lightweight, low-cost, and low-carbon-footprint perovskite solar modules. In addition, this leads to exceptional power/weight ratio, opening up new market opportunities.
This work aims to highlight the main advantages and challenges of manufacturing efficient and stable fully R2R processed perovskite solar modules by utilising the micro-groove architecture.
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