FASTENERS & SEALING
illumination (1kW/m2). In comparison, untreated control perovskites exhibited a 35% loss in power conversion efficiency after just 200 hours of operation under the same conditions.
THERMAL STABILITY When exposed to constant heat (60°C), untreated perovskite solar cells demonstrated poor thermal stability, losing 27% efficiency after 600 hours of continuous operation. By comparison, BondLynx-treated perovskite solar cells maintained nearly 98% efficiency under these conditions.
HIGH EFFICIENCY Overall, BondLynx-treated perovskite solar cells achieved a high certified efficiency of over 24% with operational stability over 1,000 hours. With no significant reduction in performance over the course of the study, the stability improvements realised by BondLynx are expected to extend far beyond the 1,000- hour mark.
LIMITING LOSSES Te reason BondLynx is effective is because it forms covalent chemical bonds with the organic components in perovskites to strongly immobilise them, thereby limiting losses in efficiency, stability, and performance. BondLynx employs diazirine-based crosslinking technology which, when exposed to heat or UV light, produces highly reactive carbenes which crosslink with virtually any nearby aliphatic organic molecules containing C-H, O-H, or N-H bonds.
XlynX chemists, Dr. Musolino and Dr. Nazir, in the lab
The organic cations within untreated perovskites are prone to migrate and escape when exposed to environmental stimuli, leading to performance degradation. With BondLynx treatment (right), organic cations are covalently bonded and immobilized, adding stability and durability to perovskite solar cells
Tis diazirine-based approach has long been utilised in the field of chemical biology, and is being successfully applied by XlynX Materials to overcome adhesion challenges associated with low surface energy plastics, to add strength to performance textiles, and increasingly to stabilise organic components in semiconductors. XlynX Materials is now
Perovskite solar cells are built with layers of materials to separate and extract charge. BondLynx treatment was applied to the perovskite layer
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actively working with solar cell manufacturers to conduct longer performance trials of its products and to help facilitate the incorporation of BondLynx into the perovskite fabrication process. If successful, this improved cell
stability could prove to be a tipping point for the commercial viability of perovskite solar products. More broadly, these findings suggest a wide range of potential applications for diazirine technology in the field of organic electronics, something the team at XlynX Materials is eager to explore.
LEFT: XlynX BondLynx Sample
David Thickens is at XlynX Materials.
www.xlynxmaterials.com
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