Realizing solution-processed heterostructures is a long-enduring challenge in halide perovskites because of solvent incompatibilities that disrupt the underlying layer. By solvent fine tuning, we could grow phase-pure two-dimensional (2D) halide perovskite bilayer stacks of the desired composition, thickness, and bandgap onto 3D perovskites without dissolving the underlying substrate. Thickness dependence of the 2D perovskite layer reveals the anticipated trends for n-i-p and p-i-n architectures, which is consistent with band alignment and carrier transport limits for 2D perovskites. We measured a photovoltaic efficiency of 24.5%, with exceptional stability of T99 (time during which the efficiency remains above 99% of its initial value) of >2000 hours, implying that the 3D/2D bilayer inherits the intrinsic durability of 2D perovskite without compromising efficiency.
 Jacky EVEN jacky.even insa-rennes.fr 02 23 23 82 95 |
 Claudine KATAN (ISCR) claudine.katan univ-rennes1.fr |
Rice University (Houston, USA), Northwestern University (Evanston, USA), Purdue University (West Lafayette, USA), Washington University (Seattle, USA), Guangzhou University (Guangzhou, China), ANL (Argonne, USA), ISCR (Rennes, France)
Deterministic fabrication of 3D/2D perovskite bilayer stacks for durable and efficient solar cells, S.Sidhik, Y. Wang, M. De Siena, R. Asadpour, A. J. Torma, T. Terlier, K. Ho, W. Li, A. B. Puthirath, X. Shuai, A. Agrawal, B. Traore, M. Jones, R. Giridharagopal, P. M. Ajayan, J. Strzalka, D. S. Ginger, C. Katan, M. Ashraful Alam, J. Even, M. G. Kanatzidis, Aditya D. Mohite Science, Vol 377, Issue 6613 pp. 1425-1430 2022, hal-03784361
This work was financially supported by the European Union through the Horizon 2020 Research and Innovation Programme through the NMBP Research and Innovation Action (grant agreement no. 861985, project Perocube)
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