Spontaneous formation of robust two-dimensional perovskite phases
The two-dimensional on three-dimensional (2D/3D) perovskite bilayer heterostructure can improve the stability and performance of perovskite solar cells. We show that the 2D/3D perovskite stack in a device evolves dynamically during its end-of-life decomposition. Initially phase-pure 2D interlayers can evolve differently, resulting in different device stabilities. We show that a robust 2D interlayer can be formed using mixed solvents to regulate its crystallinity and phase purity. The resulting 2D/3D devices achieved 25.9% efficiency and had good durability, retaining 91% of their initial performance after 1074 hours at 85°C using maximum power point tracking.
Authors
- Nam‐Gyu Park (ORCID: https://orcid.org/0000-0003-2368-6300)
- Yongli Lu (ORCID: https://orcid.org/0000-0002-7113-4124)
- Seung‐Gu Choi
- Joo‐Hong Lee (ORCID: https://orcid.org/0000-0002-7458-9706)
- Shaun Wee Kiat Tan (ORCID: https://orcid.org/0000-0002-0444-6777)
- Bryon W. Larson (ORCID: https://orcid.org/0000-0002-0934-987X)
- İlhan Yavuz (ORCID: https://orcid.org/0000-0002-3268-6268)
- Tim Kodalle (ORCID: https://orcid.org/0000-0002-8792-9669)
- Yifan Dong (ORCID: https://orcid.org/0000-0003-2912-3322)
- Matthias J. Grotevent (ORCID: https://orcid.org/0000-0003-0821-2959)
- Vladimir Bulović (ORCID: https://orcid.org/0000-0002-0960-2580)
- Kai Zhu (ORCID: https://orcid.org/0000-0003-0908-3909)
- Matthew C. Beard (ORCID: https://orcid.org/0000-0002-2711-1355)
- Carolin M. Sutter‐Fella (ORCID: https://orcid.org/0000-0002-7769-0869)
- Hua Zhu (ORCID: https://orcid.org/0000-0003-2733-7837)
- Jin‐Wook Lee (ORCID: https://orcid.org/0000-0002-0170-8620)
- So Yeon Park (ORCID: https://orcid.org/0000-0001-6774-0941)
- Ruiqi Zhang (ORCID: https://orcid.org/0000-0003-3901-8737)
- M. C. Shih
- Yu‐Kuan Lin (ORCID: https://orcid.org/0009-0002-3891-6084)
- Moungi G. Bawendi (ORCID: https://orcid.org/0000-0003-2220-4365)
Institutions
- National Laboratory of the Rockies (US)
- Lawrence Berkeley National Laboratory (US)
- IIT@MIT (US)
- Institute of Nanotechnology (GB)
- Massachusetts Institute of Technology (US)
- Marmara University (TR)
- Sungkyunkwan University (KR)
Publication Details
- Journal
- Science
- Published
- 2025-05-08
- DOI
- https://doi.org/10.1126/science.adr1334
- Citations
- 52
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 37.98