Highly Efficient Wide Bandgap Perovskite Solar Cells With Tunneling Junction by Self‐Assembled 2D Dielectric Layer
Reducing non-radiative recombination and addressing band alignment mismatches at interfaces remain major challenges in achieving high-performance wide-bandgap perovskite solar cells. This study proposes the self-organization of a thin two-dimensional (2D) perovskite BA<sub>2</sub>PbBr<sub>4</sub> layer beneath a wide-bandgap three-dimensional (3D) perovskite Cs<sub>0.17</sub>FA<sub>0.83</sub>Pb(I<sub>0.6</sub>Br<sub>0.4</sub>)<sub>3</sub>, forming a 2D/3D bilayer structure on a tin oxide (SnO<sub>2</sub>) layer. This process is driven by interactions between the oxygen vacancies on the SnO<sub>2</sub> surface and hydrogen atoms of the n-butylammonium cation, aiding the self-assembly of the BA<sub>2</sub>PbBr<sub>4</sub> 2D layer. The 2D perovskite acts as a tunneling layer between SnO<sub>2</sub> and the 3D perovskite, neutralizing the energy level mismatch and reducing non-radiative recombination. This results in high power conversion efficiencies of 21.54% and 19.16% for wide-bandgap perovskite solar cells with bandgaps of 1.7 and 1.8 eV, with open-circuit voltages over 1.3 V under 1-Sun illumination. Furthermore, an impressive efficiency of over 43% is achieved under indoor conditions, specifically under 200 lux white light-emitting diode light, yielding an output voltage exceeding 1 V. The device also demonstrates enhanced stability, lasting up to 1,200 hours.
Authors
- Dong Han Seo (ORCID: https://orcid.org/0000-0003-4235-0095)
- Fa‐Jun Ma (ORCID: https://orcid.org/0000-0002-9373-2213)
- Jae Sung Yun (ORCID: https://orcid.org/0000-0002-1882-7052)
- Ji‐Sang Park (ORCID: https://orcid.org/0000-0002-1374-8793)
- Xiaojing Hao (ORCID: https://orcid.org/0000-0001-5903-4481)
- Jongchul Lim (ORCID: https://orcid.org/0000-0001-8609-8747)
- Richard F. Webster (ORCID: https://orcid.org/0000-0003-1414-928X)
- Jincheol Kim (ORCID: https://orcid.org/0000-0001-7374-2740)
- Jihoo Lim
- Eun Young Choi (ORCID: https://orcid.org/0000-0001-6923-8015)
- Martin A. Green (ORCID: https://orcid.org/0000-0002-8860-396X)
- Arman Mahboubi Soufiani (ORCID: https://orcid.org/0000-0002-6325-8063)
- Jun Hong Noh (ORCID: https://orcid.org/0000-0002-1143-5822)
- Jan Seidel (ORCID: https://orcid.org/0000-0003-2814-3241)
- Sean Lim (ORCID: https://orcid.org/0000-0002-2800-2652)
- Minwoo Lee (ORCID: https://orcid.org/0000-0002-8728-8339)
- Seungmin Lee (ORCID: https://orcid.org/0000-0003-2965-1205)
- Dohyung Kim (ORCID: https://orcid.org/0000-0002-1586-1466)
- Wonjong Lee (ORCID: https://orcid.org/0000-0002-4470-9551)
- Danyang Wang (ORCID: https://orcid.org/0000-0002-5618-0106)
Institutions
- Chungbuk National University (KR)
- Chungnam National University (KR)
- Korea University (KR)
- Helmholtz-Zentrum Berlin für Materialien und Energie (DE)
- University of Surrey (GB)
- UNSW Sydney (AU)
- Division of Materials Science and Engineering (AU)
- Korea Electronics Technology Institute (KR)
- ARC Centre of Excellence in Advanced Molecular Imaging (AU)
- Sungkyunkwan University (KR)
- Macquarie University (AU)
Publication Details
- Journal
- Advanced Materials
- Published
- 2024-08-15
- DOI
- https://doi.org/10.1002/adma.202402053
- Citations
- 21
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 4.38
Funders
- U.S. Department of Energy
- National Research Foundation
- University of New South Wales
- Ministry of Trade, Industry and Energy
- Ministry of Science, ICT and Future Planning
- National Research Foundation of Korea
- Office of Science
- Australian Research Council
- Korea Institute of Energy Technology Evaluation and Planning
- Argonne National Laboratory