Key Findings
A significant breakthrough has been reported in the development of atmospherically processable roll-coated flexible perovskite solar cells (f-PSCs), achieving a power conversion efficiency (PCE) of 21% through the integration of photon-cured compact tin oxide (SnO2) films. This manufacturing method offers superior industrial scalability and cost-effectiveness, enabling high-throughput production at low temperatures. Notably, this approach has led to the highest reported efficiency of 22.9% for photon-cured SnO2-based devices using a roll-assisted slot-die coating method, marking a major step towards the mass production of perovskite solar cells.
Technical & Clinical Details
This innovative manufacturing process integrates two primary technologies. First, a SnO2 layer is roll-coated onto flexible indium tin oxide (ITO)-coated polyethylene terephthalate (PET) substrates using a combustion synthesis method. Combustion synthesis is suitable for flexible substrates as it forms oxides from metal salts at low temperatures. This SnO2 layer is then photon-cured by light irradiation, forming a compact, high-quality film that functions as an electron transport layer. Next, the perovskite layer is deposited using a slot-die coating technique under ambient conditions. Slot-die coating is a high-throughput method capable of uniformly applying solution-based materials over large-area substrates, and it is highly compatible with roll-to-roll manufacturing. The combination of these techniques enabled high efficiencies (23% with roll-assisted slot-die coating), comparable to traditional lab-scale spin-coating (24.3%), to be achieved in ambient air and on flexible substrates. The photon-curing process for the SnO2 layer reduces defect density and optimizes charge carrier transport, contributing to the overall device efficiency improvement.
Background & Context
Perovskite solar cells are garnering significant attention as a next-generation photovoltaic technology due to their high efficiency and potential for low-cost manufacturing. Their flexible nature, in particular, opens doors for diverse applications such as building-integrated photovoltaics (BIPV), wearable devices, and IoT sensors. However, traditional manufacturing methods often involve vacuum processes, organic solvents, and high-temperature treatments, posing challenges for large-scale production and application on flexible substrates. The combination of ambient roll-coating and photon-cured SnO2 offers a promising solution to these challenges. This represents a crucial step towards establishing scalable and sustainable manufacturing approaches, which are indispensable for perovskite solar cells to complement existing silicon solar cell markets or create new niche markets.
Strategic Significance & Outlook
Achieving a PCE of 21% for atmospherically processable roll-coated flexible perovskite solar cells indicates significant progress towards the commercialization of this technology. The future outlook involves further optimizing this manufacturing process to improve both efficiency and long-term stability. Demonstrating roll-to-roll manufacturing is particularly critical for achieving gigawatt-scale production capacity. As this technology matures, perovskite f-PSCs will open up innovative application areas that conventional solar cells could not address, serving as a low-cost, high-efficiency energy source. For example, their potential markets include smart textiles, lightweight mobile power sources, and even space applications. This breakthrough is a strategic achievement that reinforces the role of perovskite technology in sustainable energy production and power supply for various electronic devices.
Get our weekly technology intelligence — free
Receive an infographic that lets you judge at a glance whether each field’s analysis report is worth reading.
Subscribe Free — Weekly Tech Intelligence
By subscribing, you’ll receive Troy-Technical’s weekly technology intelligence newsletter.
- Your email and selected fields are used only to deliver the newsletter.
- We never share your information with third parties.
- You can unsubscribe anytime via the link in each email.
See our Privacy Policy for details.
Takes about a minute · Unsubscribe anytime
Comments