Sembito, AlexMwabora, Julius M.Nyongesa, Francis W.Diale, M. (Mmantsae Moche)2026-04-152026-04-152026-01Sembito, A. Mwabora, J.M., Nyongesa, F.W. & Diale, M. 2026, 'Guanidinium pseudo-halide salt vapor post-treatment of 3D/2D Sn-based perovskite heterostructure thin films prepared by sequential physical vapor deposition for solar cell applications', Next Materials, vol. 10, art. 101442, doi : 10.1016/j.nxmate.2025.101442.2949-8228 (online)10.1016/j.nxmate.2025.101442http://hdl.handle.net/2263/109584DATA AVAILABILITY : Data will be available upon request.Please read abstract in the article.en© 2025 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).Sequential physical vapor deposition (SPVD)HeterostructuresPerovskitesSurface passivationPerovskite solar cells (PSCs)Article