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Layered two-dimensional (2D) perovskite solar cells (PVSCs) with a chemical formula of C(NH2)3(CH3NH3)3Pb3I10 (n=3) have been fabricated through additive engineering, wherein stoichiometrically equivalent guanidinium (GA+) and methylammonium (MA+) serve as spacer cations. The crystallinity of the perovskite films is dramatically enhanced with proper amount of methylammonium thiocyanate (MASCN) added...
Vertically oriented highly crystalline 2D layered (BA)2(MA)n−1PbnI3n+1 (BA = CH3(CH2)3NH3, MA = CH3NH3, n = 3, 4) perovskite thin‐films are fabricated with the aid of ammonium thiocyanate (NH4SCN) additive through one‐step spin‐coating process. The humidity‐stability of the film is certified by the almost unchanged X‐ray diffraction patterns after exposed to humid atmosphere (Hr = 55 ± 5%) for 40...
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