Figure 1
From: Refractory plasmonics enabling 20% efficient lead-free perovskite solar cells

(a) Planar perovskite solar cell structure consisting of (VII) gold (Au) as a back contact with a thickness of 100 nm, (VI) HTM (Spiro–OMeTAD) with a thickness of 200 nm, (V) MASnI3 active material with a thickness 350 nm, (IV) ETM (TiO2) with thickness of 40 nm, and (III) ITO with thickness of 150 nm. (b) planar perovskite with the core-shell nanoparticles consisting of (I) ZrN nanoparticles as a plasmonic core and shielded by (II) SiO2 nanoshells with thickness of 40 nm. (c) planar perovskite solar cell implanted above ITO are the (VIII) TiN nanoparticles. (d) planar perovskite solar cell implanted above ITO are the (I) ZrN nanoparticles, the proposed solar cell structure is of width and depth of 600 nm.