Room temperature ferroelectricity and blue photoluminescence in zero dimensional organic lead iodine perovskites

Abstract

Organic-inorganic hybrid perovskite materials have attracted great attention for their great application potential in photovoltaics and optoelectronics. Among them, some 2D and 1D lead-iodide-based perovskites were found to exist room...

A first-principles study of exciton self-trapping and electric polarization in one-dimensional organic lead halide perovskites

“…Similar to the 1D-C 4 N 2 H 14 PbCl 4 case, we find that 1D-C 4 N 2 H 14 PbBr 4 and 1D-C 4 N 2 H 14 PbI 4 also exhibit vertical-plane ( c -axis) and equatorial-plane ( b -axis) electric polarization (see Table S4 of the ESI† for more detailed calculation results). Overall, the electric polarization of 1D-C 4 N 2 H 14 PbX 4 (X = Cl, Br and I) systems is slightly higher than that of 0D systems (0.12–0.30 μC cm −2 ) 24,46 reported so far.…”

“…As shown in the polarization part in Fig. 5 Overall, the electric polarization of 1D-C 4 N 2 H 14 PbX 4 (X = Cl, Br and I) systems is slightly higher than that of 0D systems (0.12-0.30 mC cm À2 ) 24,46 reported so far.…”

“…Recently, a variety of low-dimensional perovskites with spontaneous electric polarization have been confirmed, which exhibit broad-band luminescence and a high photoluminescence quantum yield (PLQY). 21,[23][24][25][26] Inexplicably, the PL intensity changes significantly during the ferroelectric transition to the paraelectric phase. Electrical polarization has a significant effect on luminescence intensity.…”

Mixed Halide Ordering as a Tool for the Stabilization of Ruddlesden–Popper Structures

“…23 Recently, the use of the secondary ammonium cation dimethylammonium (DMA) led to the formation of the zerodimensional (0D) perovskite (DMA) 4 PbI 6 . 26 related constraints were demonstrated by Kanatzidis et al for the hexa-and hepta-methyleneimine spacers that formed the one-dimensional (1D) chains of face-shared octahedra. 27 Considering the effects that both the size and the shape of the ammonium head have on the (de)stabilization of the 2D layered structure, one might expect that the branching of the spacer cation (in the vicinity of the ammonium head) could also have a significant impact on the dimensionality of the perovskite and the resulting properties.…”

Methylpiperazine based 0D chiral hybrid lead halides for second harmonic generation

“…This calculation result is basically consistent with the band gap values of 0D lead-based iodine HOMHs. 55…”