Bandgap-universal passivation enables stable perovskite solar cells with low photovoltage loss

Journal article

The efficiency and longevity of metal-halide perovskite solar cells are typically dictated by nonradiative defect-mediated charge recombination. In this work, we demonstrate a vapor-based amino-silane passivation that reduces photovoltage deficits to around 100 millivolts (>90% of the thermodynamic limit) in perovskite solar cells of bandgaps between 1.6 and 1.8 electron volts, which is crucial for tandem applications. A primary-, secondary-, or tertiary-amino–silane alone negatively or barely affected perovskite crystallinity and charge transport, but amino-silanes that incorporate primary and secondary amines yield up to a 60-fold increase in photoluminescence quantum yield and preserve long-range conduction. Amino-silane–treated devices retained 95% power conversion efficiency for more than 1500 hours under full-spectrum sunlight at 85°C and open-circuit conditions in ambient air with a relative humidity of 50 to 60%.

Authors: Lin, Y-H; Vikram; Yang, F; Cao, X-L; Dasgupta, A

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Association for the Advancement of Science
• Journal: Science
• Volume: 384
• Issue: 6697
• Pages: 767-775
• Publication date: 2024-05-16
• Acceptance date: 2024-04-04
• DOI: 10.1126/science.ado2302
• EISSN: 1095-9203
• ISSN: 0036-8075
• Pmid: 38753792
• Language: English
• Keywords: FFR