[Perovskites]-Scientists High-Performance Large-Area Perovskite Submodules for Solar Cells

Perovskite Solar Cells (PSCS) Are promising Solar Technologies. Although Low-Cost Wet Processing has shown Advantages in Small-Area PSC Manufacturing, the preparation of Uniform Charge Transport Layers with Thickness of Several Nanometers from Solution for Meter-Sized Large Area Products is Still Challenging.
Recently, A Research Group Led by Prof. Liu Shengzhong from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences (Case) has developed a easy surface surface redox engineering (sre) strategy for vacuum-dosposited niox to match the slot-die-coated perovskite, and Fabricated High-Performance Large-Area Perovskite Submodles.
Inverted Pscs Are Potentiallly More Valuable Than Their Normal Counterparts because the form has easily-mitigated hysteresis behavior and long-term durability. Niox has been demonstrate as the hole transport materials for inverted pscs. But for Most Vacuum-Prèssed Niox Films, the Relatively Hydrophobic Littenate Surface The Adhesion of Perovskite Ink, Making It Challenging to Deposit Large-Area Perovskite Films.
Moreover, the Surface Chemistry of Niox is Rather Complex As A Large Number of High-Oxidative-State Ni Species and Chemically Reactive Hydroxyls Can Decompose Perovskites, Leading to An Interface Energy Barrier and Noncapacitive Hysteresis.
The Sre Strategy Not Only Elimates The Local De-Wetting Problem of Perovskite Ink, Thus Achieving Uniform Polycrystalline Perovskite Films at The Decimeter Level, But also Imperd Enhanced Performance in Electronic Properties, Stability, Mechanical Adhesion At The Buried Interface Niox surface features.
In This Study, The Researchers Achieved High-Performance Pscs With Stability of Thousands of Hours Under Various Stressed Conditions and Outstanding Photovoltaic Performance. The Power Efficiency Conversion of Pscs Were 23.4% and 21.3% for Rigid and Flexible Devices, respectively.
Furthermore, due to the scalabibility of sre strategy to wide-area configurations, they assembled permodules of area 156 × 156 mm2 with a remark efficiency of 18.6% Along with negligible hysteresis and good stability.
"The Sre Strategy PROVIDES A PROFF OF CONCEPT FOR COMBINING VACUUM-FABRICATED LOAD TRANSPORT LAYERS With Wet-Processed Perovskites and Facilitates The Stacking Engineering of Large-SCALE, Uniform Thin Films for the Development of Efficient and Stable Perovskite Modules," Said Prof. Liu.

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