A piperidinium salt stabilizes efficient metal-halide perovskite solar cells
University of Oxford · Imperial College London · +6 more institutions
Abstract
Longevity has been a long-standing concern for hybrid perovskite photovoltaics. We demonstrate high-resilience positive-intrinsic-negative perovskite solar cells by incorporating a piperidinium-based ionic compound into the formamidinium-cesium lead-trihalide perovskite absorber. With the bandgap tuned to be well suited for perovskite-on-silicon tandem cells, this piperidinium additive enhances the open-circuit voltage and cell efficiency. This additive also retards compositional segregation into impurity phases and pinhole formation in the perovskite absorber layer during aggressive aging. Under full-spectrum simulated sunlight in ambient atmosphere, our unencapsulated and encapsulated cells retain 80 and 95%…
Citation impact
- FWCI
- 46.30
- Percentile
- 100%
- References
- 79
Authors
25Topics & keywords
- Perovskite (structure)
- Formamidinium
- Trihalide
- Materials science
- Halide
- Photovoltaics
- Band gap
- Chemical engineering