Interfacial molecular anchor enhances performance of ambient all-bladed perovskite solar cells

Perovskite photo voltaic cells (PSCs) supply excessive effectivity and low fabrication prices, making them robust candidates for next-generation photovoltaic expertise. Printing strategies have turn into the popular industrial pathway amongst obtainable fabrication strategies on account of their compatibility with large-scale, steady manufacturing.

Nevertheless, SnO₂ nanoparticles—generally used because the electron transport layer—are likely to mixture through the printing processresulting in non-uniform movie formation. This aggregation introduces crystallization defects within the perovskite layer and creates interfacial cost transport boundaries, posing a problem to additional effectivity enhancements.

In a research revealed in Joulea group led by Prof. Yang Dong and Prof. Liu Shengzhong from the Dalian Institute of Chemical Physics (DICP) of the Chinese language Academy of Sciences has addressed this problem by means of interface interplay optimization.

Researchers launched tetramethylammonium chloride (TMACL) into the SnO₂ precursor colloidal resolution. TMACL, leveraging electrostatic interactions, successfully “anchored” the SnO₂ nanoparticles, suppressing their agglomeration and enhancing general colloidal stability. The floor roughness of the coated movie was diminished by 32%, and pinhole defects had been minimized.

Furthermore, the nitrogen atoms in TMACL shaped chemical bonds with lead ions within the perovskite layer, performing as a “molecular glue” that tightly certain the electron transport layer to the perovskite absorber. This robust interfacial connection diminished interface defect density by 40% and considerably improved cost extraction effectivity.

By means of this “molecular glue” technique, researchers bridged the efficiency hole between laboratory-scale and large-area gadgets. They fabricated a perovskite module with an aperture space of 57.20 cm² fully by means of a coating-based course of, reaching an influence conversion effectivity of twenty-two.76%, with a licensed effectivity of 21.60%. The unencapsulated system retained 93.25% of its preliminary effectivity after 1,500 hours of operation beneath ambient situations, which was superior to gadgets produced by typical strategies.

Moreover, the technique proved efficient in versatile perovskite solar cells. A versatile module in the identical space achieved an effectivity exceeding 20% and maintained 95.3% of its preliminary efficiency after 500 bending cycles, highlighting its potential for purposes in wearable electronics, vehicle-integrated photovoltaics, and different rising eventualities.

The technique can seamlessly combine with scalable coating and printing processes. In contrast to conventional spin-coating, printing permits steady fabrication of meter-scale movies with materials utilization charges exceeding 90% and power consumption being diminished by 50%. As well as, TMACL prices solely one-tenth of typical interface modification supplies as it’s a broadly obtainable industrial reagent, and it eliminates the necessity for further processing steps.

“Our study lowers the barriers to large-scale manufacturing and paves the way for the commercial deployment of high-performance perovskite solar technologies,” stated Prof. Liu.