Structure and optical properties of lead iodide based two-dimensional perovskite compounds containing fluorophenethylamines

Electronic model for self-assembled hybrid organic/perovskite semiconductors: Reverse band edge electronic states ordering and spin-orbit coupling

“…The DFT electronic structure also reveals a direct band-gap character in agreement with the observed luminescence at room temperature 8,17 . .…”

“…In a few cases, the cation packing is compatible with the inorganic framework, made of corner-shared PbX 6 octaedra (X=Cl, Br, I), leading to a perfectly ordered 2D system built on a single crystal hybrid organic perovskite (SCHOP). This is the case of 4F-PEPI with a monoclinic unit cell 17 as shown in Fig. 1.…”

“…Experimental lattice parameters (transformed to P21/c: a=16.7 Å, b=8.6 Å, c=8.8 Å, β=110°) and atomic positions 19 were used for the DFT calculations with C-H and N-H bond length fixed to 1.089 and 1.008 Å respectively. As X-ray diffraction pattern of spin-coated films of 4F-PEPI lead to the same interlayer spacing (16.7 Å) 17 , the SCHOP 4F-PEPI is believed to offer a good reference framework to investigate the electronic and optical properties of its SAHOP counterpart. Figure 2 shows the band structure of mono-crystalline 4F-PEPI with and without the spin-orbit interaction.…”

Vibrational and optical properties of a one‐dimensional organic–inorganic crystal [C6H14N]PbI3

“…The low dimensionality of the structure combined with the dielectric confinement effect enable the formation of stable excitons in the inorganic chains. 17,19,22 Under optical excitation, an electron is excited from the valence band (VB), consisting of a mixture of Pb (6s) and I (5p) states, to the conduction Fig. 5.…”

Morphology-controlled synthesis of lead iodine compounds from lead foils and iodine

“…For example, sol-gel methods [14] and vapor deposition methods [15] were generally used for growth of PbI 2 single crystals and evaporation and sublimation methods were used to fabricate PbI 2 film on a certain substrate [16,17]. While numerous research works mainly focus on the purification method [18], electronic and optical properties related to their performances as radiation detector [19], the factors to control Recently, Qian and co-workers synthesized bundles of single-crystalline PbI 2 nanobelts through a facile solutionbased hydrothermal method at the assistance of dodecylamine [21]. Also, in our previous work, hydrothermal/ solvothermal treatment was successfully introduced to synthesize epitaxial lead iodide films composed of hexagonal single crystals [6].…”