Self -regulated molecular anchoring stimulates stable high efficiency perovskiet solar cells
While Perovskiet solar cells (PSCs) are getting closer to commercialization, researchers treat hidden performance losses on the buried electron transport interimface. A team led by Prof. dr. Guozhen Liu, Prof. dr. Zhihua Zhang, and Prof. dr. Xu Pan has developed a strategy for one molecule called self -regulated bilateral anchoring that improves efficiency and sustainability in both rigid and flexible devices.
The buried interface is susceptible to oxygen vacancies, incorrectly aligned energy levels, mechanical stress and solvent -related instability, all of which hinder long -term performance. The team used square acid (SA) as a molecular bridge. The double carbonic acid groups bind with both SNO2 and PB2+perovskiet, which forms a robust and solvent -resistant connection.
This binding at the same time heals defects, improves the mobility of the carriers and takes residual voltage by turning pullers into useful compression during thermal processing. As a result, cargo transport is more efficient and the schedule structure gets resilience against cracking.
The results are remarkable: Rigid PSCs achieved a record power conversion -efficiency (PCE) of 25.50 percent, while flexible versions reached 24.92 percent with minimal hysteresis. Do with large parts (1 cm2) still reached 24.01 percent, which confirmed the scalability. Stability tests showed that non -components cells retained more than 90 percent of peak efficiency after 3840 hours in moist air, and flexible devices had 10,000 bending cycles with less than 10 percent loss.
The universal compatibility of the method with spinning, knife or lock-die coating on various substrates, including glass, pen and stainless steel steel positions this innovation for industrial rollout. The researchers now transfer the SA interlayer to roll-to-roll manufacture and 30 + 30 cm2 minimodules, with certification efforts planned within two years.
This work emphasizes square acid as a practical modifier with one components that at the same time tackles multiple bottlenecks in performance, making significant progress in the direction of stable, commercially feasible PSCs of more than 25 percent efficiency.
Research report:Self -regulating bilateral anchoring makes efficient cargo transport routes possible for powerful rigid and flexible perovskite solar cells
