Key Findings
Researchers at France’s CEA-INES (National Solar Energy Institute) have set a new world record for flexible perovskite solar cells, achieving an internal efficiency of 21.2% on PET (polyethylene terephthalate) substrates. This significant advancement was facilitated by the incorporation of an advanced anti-reflective coating and optimized electrical connections. Notably, this record was established on an active area of 0.28 cm², which is approximately three times larger than the previous world record for flexible cells. CEA-INES is now targeting an ambitious 30% efficiency for all-perovskite tandem solar cells on flexible substrates, specifically for demanding space applications, highlighting the high-performance potential of this technology.
Technical / Clinical Details
The efficiency enhancement in these flexible perovskite solar cells stems from a dual-pronged technical approach. Firstly, the application of an anti-reflective coating significantly minimizes light reflection, maximizing the amount of sunlight absorbed by the perovskite layer. Secondly, the electrical connections were meticulously redesigned to reduce series resistance and enhance charge collection efficiency, thereby minimizing internal power losses. These optimizations allowed CEA-INES to overcome the historical trade-off between efficiency and active area in flexible solar cells. Demonstrating high efficiency on a relatively large active area of 0.28 cm² is particularly important, as it suggests greater scalability and practicality for real-world applications beyond laboratory prototypes.
Background & Context
Flexible solar cells are highly sought after for their lightweight, thin, and bendable characteristics, making them ideal for a diverse range of applications including wearable electronics, drones, satellites, IoT sensors, and building-integrated photovoltaics on curved surfaces. However, historically, flexible solar cells have lagged behind their rigid counterparts in terms of power conversion efficiency. CEA-INES’s achievement decisively proves that high efficiency can be attained in a flexible format, thereby accelerating the expansion of this burgeoning market. The specific focus on space applications underscores the rigorous reliability and durability expected from this technology, as it must withstand extreme environmental conditions.
Strategic Significance & Outlook
The ambitious goal set by CEA-INES to achieve 30% efficiency for all-perovskite tandem solar cells on flexible substrates for space applications is a testament to the transformative potential of this breakthrough. Flexible, high-efficiency solar cells are poised to play a crucial role in diversifying future energy supplies, particularly in remote areas, mobile platforms, and the vastness of space where conventional power sources are impractical. As further research and development improve durability and cost-effectiveness, this technology is expected to revolutionize numerous industrial sectors and accelerate the global adoption of clean energy solutions. The combination of flexibility, high efficiency, and robustness will be key to unlocking new markets and applications.
Source: https://www.perovskite-info.com/cea-ines-sets-new-flexible-perovskite-record-212-efficiency
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