Noëlla LEMAITRE | CEA: Despite silicon solar cells approaching theoretical efficiency limits, can perovskite-silicon tandems truly overcome current industrial scaling hurdles?
00:00:07 - 00:01:22
Other snippets from this talk
Summary of the clip:
Despite silicon solar cells approaching theoretical efficiency limits, can perovskite-silicon tandems truly overcome current industrial scaling hurdles?
Silicon single-junction solar cells have achieved high maturity, nearing their theoretical efficiency limit of 27.3%. To surpass this, perovskite-silicon tandem architectures offer a promising pathway, demonstrating efficiencies approaching 35%. However, transitioning these high-performance lab-scale devices to industrial applications presents significant challenges, including scaling from small cells to full wafers and modules, and adapting lab-based deposition techniques to high-throughput industrial processes.
The primary hurdles for industrialization involve moving beyond small-scale research devices to full-wafer and module integration on fully textured silicon cells. This necessitates replacing laboratory deposition methods like spin coating with industrial techniques that ensure uniformity, large-surface coverage, and high throughput. Furthermore, the long-term durability and reliability of these tandem modules are critical aspects that must be addressed for market adoption.
In this short video, you can learn:
* The current efficiency limits of silicon single-junction solar cells.
* The potential of perovskite-silicon tandem cells to exceed these limits.
* Key challenges in upscaling perovskite-silicon tandem technology for industrial application.
* The need for industrial deposition techniques and improved durability.
📋 **Clip Abstract** This segment introduces the current state of silicon PV and the potential of perovskite-silicon tandem cells to achieve higher efficiencies. It outlines the critical challenges in scaling this technology from laboratory research to industrial production, emphasizing the need for new manufacturing processes and enhanced durability.
#PerovskiteSiliconTandem, #IndustrialScaling, #HighThroughputDeposition, #ModuleDurability, #Photovoltaics, #SolarCells
This is a highlight of the presentation:
Challenges for upscaling Perovskite/Silicon tandem solar cells
More Highlights from the same talk.
00:04:02 - 00:07:11
How can we transition from lab-scale spin coating to industrial-scale perovskite deposition while maintaining high efficiency on textured silicon?
How can we transition from lab-scale spin coating to industrial-scale perovskite deposition while maintaining high efficiency on textured silicon?
Upscaling perovskite deposition from laboratory spin coating to industrial methods is crucial for commercial viability. Spin coating, while effective for small devices, lacks the high throughput and uniformity required for large-area manufacturing. Industrial solutions under investigation include full vacuum processes like co-evaporation, hybrid approaches combining inorganic matrix evaporation with wet conversion methods such as slot-die coating, and entirely solvent-processed routes like slot-die coating on nano-textured silicon substrates.
Our work at CEA focuses on a hybrid route, involving co-evaporation of PbI2 and CsBr inorganic matrices, followed by halide formulation and post-annealing for conversion. Key challenges in this process include controlling the morphology, composition, and porosity of the initial inorganic matrix to ensure conformal deposition and optimal infiltration during the wet conversion step, which is critical for perovskite crystallization. We have demonstrated efficiencies up to 25% on 9 cm² devices using this method, and are now transitioning from spin coating to industrial techniques like doctor blading and slot-die coating for the conversion step.
In this short video, you can learn:
* The limitations of spin coating for industrial perovskite deposition.
* Different industrial strategies for perovskite layer deposition, including vacuum, hybrid, and full solvent processes.
* Specific challenges in controlling morphology and composition during hybrid deposition methods.
* Progress in transitioning to large-area coating techniques like doctor blading.
📋 **Clip Abstract** This segment details the critical shift from lab-scale spin coating to industrial perovskite deposition techniques for tandem solar cells. It explores various upscaling strategies, including hybrid and full solvent processes, highlighting the challenges in material control and layer uniformity on textured substrates.
#PerovskiteUpscaling, #HybridPerovskiteDeposition, #SlotDieCoating, #TexturedSilicon, #Photovoltaics, #TandemSolarCells
00:09:10 - 00:09:23
Can accelerated aging tests accurately predict the long-term outdoor stability of perovskite-silicon tandem solar cells?
Can accelerated aging tests accurately predict the long-term outdoor stability of perovskite-silicon tandem solar cells?
Achieving high efficiency in perovskite-silicon tandem devices is paramount, but equally crucial is ensuring their long-term stability and reliability for industrial adoption. Our approach involves evaluating both intrinsic and extrinsic stability through accelerated aging tests and outdoor monitoring. Accelerated tests, such as continuous illumination at elevated temperatures (e.g., 100 hours at MPPT under 1 sun at 55°C) or light soaking tests (e.g., 3 days at VOC under continuous illumination for unencapsulated cells), provide rapid feedback on degradation mechanisms without waiting for months or years of outdoor exposure.
The relevance of these accelerated tests hinges on their ability to replicate real-world degradation modes. We have demonstrated that the observed degradation in accelerated conditions, such as a drop in VOC due to charge recombination barrier formation, is comparable to that seen in outdoor monitoring over several months. This allows for efficient screening of materials and processes, as exemplified by a study comparing 10 different Hole Transport Layers (HTLs). This rapid screening identified an optimal HTL (HTL 10.4) that offers a superior balance between initial performance and stability, confirmed by ISO L3 protocol tests showing a T80 approaching 1000 hours.
In this short video, you can learn:
* The importance of stability evaluation for industrial perovskite-silicon tandem cells.
* The methodology behind intrinsic and extrinsic stability testing.
* How accelerated aging tests are designed to mimic real-world degradation.
* An example of using accelerated tests to screen and optimize Hole Transport Layers (HTLs) for improved device stability.
📋 **Clip Abstract** This segment emphasizes the critical role of stability evaluation for industrial perovskite-silicon tandem cells, detailing the use of both accelerated aging tests and outdoor monitoring. It demonstrates how accelerated tests can effectively screen materials and processes, providing rapid, relevant feedback on degradation mechanisms comparable to real-world conditions.
#PerovskiteSiliconTandem, #AcceleratedAgingTests, #DeviceStability, #HoleTransportLayers, #SolarEnergy, #Photovoltaics