Amidination of ligands for chemical and field-effect passivation stabilizes perovskite solar cells
Surface passivation has driven the rapid increase in the power conversion efficiency (PCE) of perovskite solar cells (PSCs). However, state-of-the-art surface passivation techniques rely on ammonium ligands that suffer deprotonation under light and thermal stress. We developed a library of amidinium ligands, of interest for their resonance effect-enhanced N-H bonds that may resist deprotonation, to increase the thermal stability of passivation layers on perovskite surfaces. This strategy resulted in a >10-fold reduction in the ligand deprotonation equilibrium constant and a twofold increase in the maintenance of photoluminescence quantum yield after aging at 85°C under illumination in air. Implementing this approach, we achieved a certified quasi-steady-state PCE of 26.3% for inverted PSCs; and we report retention of ≥90% PCE after 1100 hours of continuous 1-sun maximum power point operation at 85°C.
Authors
- Isaiah W. Gilley (ORCID: https://orcid.org/0000-0002-4129-1911)
- Abdulaziz S. R. Bati (ORCID: https://orcid.org/0000-0001-6346-4396)
- Lin X. Chen (ORCID: https://orcid.org/0000-0002-8450-6687)
- Chuying Huang (ORCID: https://orcid.org/0000-0003-1468-3570)
- Selengesuren Suragtkhuu (ORCID: https://orcid.org/0000-0002-1375-814X)
- Robert P. Reynolds (ORCID: https://orcid.org/0000-0001-8344-3816)
- Jian Xu (ORCID: https://orcid.org/0000-0002-1532-5145)
- Taylor E. Wiggins (ORCID: https://orcid.org/0009-0009-2865-4018)
- Stefan Zeiske (ORCID: https://orcid.org/0000-0002-6598-3066)
- Mercouri G. Kanatzidis (ORCID: https://orcid.org/0000-0003-2037-4168)
- Christos D. Malliakas (ORCID: https://orcid.org/0000-0003-4416-638X)
- Cheng Liu (ORCID: https://orcid.org/0000-0003-0258-4428)
- Edward Hartley Sargent (ORCID: https://orcid.org/0000-0003-0396-6495)
- Shuta Kitade (ORCID: https://orcid.org/0000-0002-7577-8664)
- Haoyue Wan (ORCID: https://orcid.org/0000-0001-8137-9152)
- Yi Yang (ORCID: https://orcid.org/0000-0002-7775-6856)
- Munkhbayar Batmunkh (ORCID: https://orcid.org/0000-0002-7493-4186)
- Zaiwei Wang (ORCID: https://orcid.org/0000-0001-9725-0206)
- Hao Chen (ORCID: https://orcid.org/0000-0002-6995-0288)
- Bin Chen (ORCID: https://orcid.org/0000-0002-2106-7664)
Institutions
- Northwestern University (US)
- Griffith University (AU)
- Argonne National Laboratory (US)
- University of Toronto (CA)
Publication Details
- Journal
- Science
- Published
- 2024-11-21
- DOI
- https://doi.org/10.1126/science.adr2091
- Citations
- 274
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 57.18