Multifunctional sulfonium-based treatment for perovskite solar cells with less than 1% efficiency loss over 4,500-h operational stability tests
Copyright policy )Multifunctional sulfonium-based treatment for perovskite solar cells with less than 1% efficiency loss over 4,500-h operational stability tests
AbstractThe stabilization of grain boundaries and surfaces of the perovskite layer is critical to extend the durability of perovskite solar cells. Here we introduced a sulfonium-based molecule, dimethylphenethylsulfonium iodide (DMPESI), for the post-deposition treatment of formamidinium lead iodide perovskite films. The treated films show improved stability upon light soaking and remains in the black α phase after two years ageing under ambient condition without encapsulation. The DMPESI-treated perovskite solar cells show less than 1% performance loss after more than 4,500 h at maximum power point tracking, yielding a theoretical T80 of over nine years under continuous 1-sun illumination. The solar cells also display less than 5% power conversion efficiency drops under various ageing conditions, including 100 thermal cycles between 25 °C and 85 °C and an 1,050-h damp heat test.
- Swiss Federal Laboratories for Materials Science and Technology Switzerland
- École Polytechnique Fédérale de Lausanne EPFL Switzerland
- National Research Council Italy
- Uppsala University Sweden
- Linköping University Sweden
LEAD TRIIODIDE, ENABLES, PERFORMANCE, DEGRADATION, INTERFACES, HUMIDITY, SURFACES, VOLTAGE, BANDGAP, IMPACT, Solar cells, Performance, Interfaces, Materialkemi, Bandgap, Physical Chemistry, 4016 Materials Engineering, Article, Degradation, Lead Triiodide, Materials Chemistry, Enables, 40 Engineering, Fysikalisk kemi, Energy, 621, Humidity, Voltage, Surfaces, Impact
LEAD TRIIODIDE, ENABLES, PERFORMANCE, DEGRADATION, INTERFACES, HUMIDITY, SURFACES, VOLTAGE, BANDGAP, IMPACT, Solar cells, Performance, Interfaces, Materialkemi, Bandgap, Physical Chemistry, 4016 Materials Engineering, Article, Degradation, Lead Triiodide, Materials Chemistry, Enables, 40 Engineering, Fysikalisk kemi, Energy, 621, Humidity, Voltage, Surfaces, Impact
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