Oral Presentation Royal Australian Chemical Institute National Congress 2026

2D/3D heterostructures for efficient tin halide perovskite photovoltaics (138103)

Peng Chen 1
  1. The University of Queensland, St Luica, QUEENSLAND, Australia

Tin halide perovskites (THPs) have emerged as promising lead-free candidates for eco-friendly perovskite solar cells, but their photovoltaic performance still lags behind that of lead-based counterparts due to poor thin-film quality. Constructing two-dimensional/three-dimensional (2D/3D) heterostructures can effectively regulate crystallization and suppress defect formation for developing high-quality polycrystalline THP thin films.1,2 Here, we introduced colloidal chemistry engineering strategies to synchronize the nucleation kinetics of 2D and 3D crystalline phases for the growth of homogeneous 2D/3D THP heterostructures.3 Consequently, the optimised devices deliver an excellent power conversion efficiency of 17.13% (certified 16.65%) and exhibit stable operation under continuous one-sun illumination for over 1,500 h in nitrogen without encapsulation. This study offers new insights into colloidal chemistry and crystallisation regulation of mixed-dimensional heterostructures, paving the way for high-performance lead-free perovskite photovoltaics.

  1. P. Chen, Y. Bai, S. Wang, M. Lyu, J. H. Yun, L. Wang, Adv. Funct. Mater. 2018, 28, 1706923.
  2. P. Chen, D. He, X. Huang, C. Zhang, L. Wang, ACS Nano 2023, 18, 67.
  3. D. He, P. Chen, J. A. Steele, Z. Wang, H. Xu, M. Zhang, S. Ding, C. Zhang, T. Lin, F. Kremer, H. Xu, M. Hao, L. Wang, Nat. Nanotechnol. 2025, 20, 779-786.