Enhanced Efficiency and Stability for the Inverted High‐Bandgap Perovskite Solar Cell via Bottom Passivation Strategy
The bottom perovskite with the hole transport layer (HTL) in inverted perovskite solar cells (PSCs) interface has received little attention due to challenges like interlayer dissolution during perovskite deposition. And voids at the perovskite/HTL interface can degrade cell performance. This work introduces a two‐dimensional (2D) perovskite layer between the perovskite and poly (N, N′‐bis‐4‐butylphenyl‐N, N′‐bisphenyl) benzidine (Poly‐TPD) HTL using a mixed solution of 4‐methylphenethylammonium chloride (4M‐PEA‐Cl), methylammonium iodide (MA‐I), and Poly(9,9‐bis(3′‐(N,N‐dimethyl)‐N‐ethylammoinium‐propyl‐2,7‐fluorene)‐alt‐2,7‐(9,9‐dioctylfluorene))dibromide (PFN‐Br). The amine functional groups in the organic salts improved HTL wettability, resulting in a void‐free interface. 4M‐PEA‐Cl, with its strong electron‐withdrawing benzene ring, outperformed other amine‐containing salts in passivating undercoordinated Pb 2+ ions. Incorporating this hybrid passivation layer in PSCs resulted in a 1.8% absolute increase in power conversion efficiency (PCE) to 19.1% with 1.68 eV perovskite bandgap. Additionally, the passivated PSCs demonstrated enhanced operational stability, retaining 91% of their initial efficiency after 800 hours of continuous 1‐sun illumination, compared to 84.7% for the control sample.
Authors
- Anh Dinh Bui (ORCID: https://orcid.org/0000-0002-9660-6132)
- Grace Dansoa Tabi (ORCID: https://orcid.org/0000-0001-5489-6090)
- Olivier Lee Cheong Lem
- The Duong (ORCID: https://orcid.org/0000-0002-1298-4743)
- Keqing Huang (ORCID: https://orcid.org/0000-0002-0088-9044)
- Dang‐Thuan Nguyen (ORCID: https://orcid.org/0000-0003-0223-9210)
- Xuan Minh Chau Ta (ORCID: https://orcid.org/0000-0002-6435-3361)
- Frank Brink (ORCID: https://orcid.org/0000-0001-6292-1778)
- Felipe Kremer (ORCID: https://orcid.org/0000-0001-6263-7806)
- Viqar Uddin Ahmad (ORCID: https://orcid.org/0000-0002-6782-7382)
- Klaus Weber (ORCID: https://orcid.org/0000-0002-2421-6178)
- Leiping Duan (ORCID: https://orcid.org/0000-0001-6253-9018)
- Anne Haggrén
- Azul Osorio Mayon
- Kylie Catchpole (ORCID: https://orcid.org/0000-0003-4858-1820)
- Heping Shen (ORCID: https://orcid.org/0000-0002-8409-8839)
- Hualin Zhan (ORCID: https://orcid.org/0000-0002-1804-8948)
- Daniel Walter (ORCID: https://orcid.org/0000-0002-4622-1912)
- Yihui Hou (ORCID: https://orcid.org/0000-0002-0601-5882)
- Li‐Chun Chang (ORCID: https://orcid.org/0009-0000-9675-4066)
- Wei Wang (ORCID: https://orcid.org/0009-0008-4390-4882)
- Thomas P. White (ORCID: https://orcid.org/0000-0001-8493-9450)
Institutions
- Australian National University (AU)
- The University of Sydney (AU)
Publication Details
- Journal
- Solar RRL
- Published
- 2024-08-29
- DOI
- https://doi.org/10.1002/solr.202400391
- Citations
- 7
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.46
Funders
- Australian National Fabrication Facility
- Australian Government