FASTENERS & SEALING
SECURING SOLAR
How an innovative diazirine crosslinker is enabling ultra-stable prevoskite solar cells while limiting degradation
Thin-fi lm perovskite solar panels in the fi eld
thin-fi lm technology, perovskites provide a lighter-weight solar cell option that can be produced at a lower cost and deposited on a fl exible base. T is means new design and application opportunities for the way solar power is collected, and the potential for faster, more widespread expansion of the world’s capacity to generate solar energy. While major advances have been
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achieved with rapidly rising power conversion effi ciencies and scalable fabrication approaches, the long- term stability of perovskite solar
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erovskite solar cells are showing strong potential as high performance alternatives to conventional silicon solar cells. As
cells when exposed to environmental stimuli has remained an obstacle to commercialisation. Perovskite solar cells are built with
layers of materials, either printed or coated from liquid inks, spin-coated, or vacuum-deposited. When exposed to heat and sunlight, the volatile organic components within the perovskite layer have a tendency to escape or migrate. T is leads to degradation which signifi cantly reduces their effi ciency, stability and performance. While several strategies have been employed in the past to address this instability, none have been successful in providing perovskite solar cells with ongoing protection from
environmental exposure. Taking a novel approach to solving this stability challenge, researchers at Fudan University in Shanghai, China, used a molecular bis-diazirine crosslinker – a product called BondLynx, designed and manufactured by specialty chem- tech company XlynX Materials – to covalently bond the organic cations within the perovskite layer. T e results were extraordinary.
ILLUMINATION STABILITY BondLynx-treated perovskite solar cells showed remarkable stability, retaining nearly 99% of their initial effi ciency even after 1,000 hours of continuous 1-sun
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