Self regulated molecular anchoring drives secure excessive effectivity perovskite photo voltaic cells
by Riko Seibo
Tokyo, Japan (SPX) Sep 25, 2025
As perovskite photo voltaic cells (PSCs) transfer nearer to commercialization, researchers are addressing hidden efficiency losses on the buried electron-transport interface. A group led by Prof. Guozhen Liu, Prof. Zhihua Zhang, and Prof. Xu Pan has developed a single-molecule technique referred to as self-regulated bilateral anchoring that enhances effectivity and sturdiness in each inflexible and versatile units.
The buried interface is liable to oxygen vacancies, misaligned vitality ranges, mechanical stress, and solvent-related instability, all of which hinder long-term efficiency. The group employed squaric acid (SA) as a molecular bridge. Its twin carboxylic acid teams bond with each SnO2 and perovskite Pb2+, forming a strong and solvent-resistant connection.
This bonding concurrently heals defects, improves service mobility, and releases residual stress by shifting tensile forces into useful compression throughout thermal processing. Consequently, cost transport is extra environment friendly, and the lattice construction good points resilience in opposition to cracking.
The outcomes are notable: inflexible PSCs achieved a report energy conversion effectivity (PCE) of 25.50 %, whereas versatile variations reached 24.92 % with minimal hysteresis. Massive-area units (1 cm2) nonetheless reached 24.01 %, confirming scalability. Stability assessments confirmed that unencapsulated cells retained over 90 % of peak effectivity after 3840 hours in humid air, and versatile units endured 10,000 bending cycles with lower than 10 % loss.
The common compatibility of the tactic with spin, blade, or slot-die coating on various substrates-including glass, PEN, and stainless steel-positions this innovation for industrial rollout. The researchers at the moment are transferring the SA interlayer to roll-to-roll fabrication and 30 + 30 cm2 minimodules, with certification efforts deliberate inside two years.
This work highlights squaric acid as a sensible, single-component modifier that addresses a number of efficiency bottlenecks without delay, marking a big advance towards secure, commercially viable PSCs exceeding 25 % effectivity.
Analysis Report:Self-Regulated Bilateral Anchoring Enables Efficient Charge Transport Pathways for High-Performance Rigid and Flexible Perovskite Solar Cells
Associated Hyperlinks
Shanghai Jiao Tong University
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