AI Article Synopsis
- Mechanical and chemical issues at device interfaces can significantly affect the long-term stability of perovskite solar cells (PSCs) in extreme conditions.
- The study introduces chirality-mediated interfaces using -/-methylbenzyl-ammonium to improve the mechanical strength and reliability of the heterointerface between the perovskite and electron-transport layer.
- These enhanced interfaces retain 92% power-conversion efficiency after rigorous thermal cycling and damp heat tests, demonstrating resilience to environmental stressors.
Article Abstract
Mechanical failure and chemical degradation of device heterointerfaces can strongly influence the long-term stability of perovskite solar cells (PSCs) under thermal cycling and damp heat conditions. We report chirality-mediated interfaces based on -/-methylbenzyl-ammonium between the perovskite absorber and electron-transport layer to create an elastic yet strong heterointerface with increased mechanical reliability. This interface harnesses enantiomer-controlled entropy to enhance tolerance to thermal cycling-induced fatigue and material degradation, and a heterochiral arrangement of organic cations leads to closer packing of benzene rings, which enhances chemical stability and charge transfer. The encapsulated PSCs showed retentions of 92% of power-conversion efficiency under a thermal cycling test (-40°C to 85°C; 200 cycles over 1200 hours) and 92% under a damp heat test (85% relative humidity; 85°C; 600 hours).
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| http://dx.doi.org/10.1126/science.ado5172 | DOI Listing |
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