Ellipsometry study of dielectric function and thermal degradation of 2D L2PbI4 (L = PEA: C8H12N+, BA:C4H12N+) perovskite thin films.

Two-dimensional (2D) Ruddlesden-Popper (RP) metal halide perovskites have been widely utilized to enhance the stability of perovskite solar cells (PSCs), owing to their superior stability over their 3D counterparts. However, to date, there remain lim…

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