Patterning and photoluminescent properties of perovskite-type organic/inorganic hybrid luminescent films by soft lithography

Synthesis, vibrational and optical properties of a new three-layered organic–inorganic perovskite (C4H9NH3)4Pb3I4Br6

“…(ii) A green luminescence around 520 nm, characteristic of PbI-based compounds and associated to electronic transitions between Pb (6s) orbital hybridised with the I (5p) orbital and 6(p) orbital of the Pb-I bonds [1,[20][21][22].…”

“…However, there exist a class of organic/ inorganic materials in which the large dielectric confinement leads to exciton bending energy of several hundreds of meV. These layered organic inorganic perovskites with the general formula (C n ) 2 PbX 4 (C n ¼ C n H 2n+1 HN 3 , X ¼ Br, I), can be regarded as semiconductor/insulator multiple quantum well systems consisting of lead halide semiconductor layers sandwiched between organic ammonium insulator layers [8][9][10][11][12][13]. Owing to their large binding energy, stable excitons are formed, exhibiting attractive optical properties such as efficient luminescence and high optical nonlinearity [14,15].…”

Optical properties of organic–inorganic hybrid films prepared by the two-step growth process

“…Stable excitons, with substantially large binding energy as large as a few hundreds meV, exist in (C n H 2n+1 NH 3 ) 2 PbX 4 even at room temperature [8]. The large exciton binding energy offers interesting opportunities for use in novel optical and electrical devices [9][10][11][12][13][14]. From the viewpoint of materials design, (C n H 2n+1 NH 3 ) 2 PbBr 4 can be expected to be interesting optical devices operated at the near-ultraviolet region because the optical band gap of PbBr 2 locates at 4.1 eV.…”

Ionothermal synthesis, structure and optical properties of three new organic–inorganic hybrid imidazolium bromoplumbate complexes

“…The electron (⊖) and the hole (⨁) move freely in the CB and VB, forming an exciton. The recombination of the electron and hole in the exciton yields an emission [44,45]. It should be pointed out that the blue shifts of emission bonds for 1-3 indicate that the organic components in the hybrid solids can both change the structure and the optical properties of the inorganic lead(II) halide components.…”