Preparation and Two-Photon Photoluminescence Properties of Organic Inorganic Hybrid Perovskites (C6H5CH2NH3)2PbBr4 and (C6H5CH2NH3)2PbI4

Abstract

Organic inorganic hybrid perovskites have potential applications in solar cells, electroluminescent devices and radiation detection because of their unique optoelectronic properties. In this paper, the perovskites (C6H5CH2NH3)2PbBr4 and (C6H5CH2NH3)2PbI4 were synthesized by solvent evaporation. The crystal structure, morphology, absorption spectrum, laser power dependence of the photoluminescence (PL) intensity and lifetime were studied. The results showed that the perovskites (C6H5CH2NH3)2PbBr4 and (C6H5CH2NH3)2PbI4 display a layered stacking structure of organic and inorganic components. The absorption peaks are located at 392 nm (3.16 eV) and 516 nm (2.40 eV), respectively. It was observed that the PL intensity and photoluminescence quantum yield (PLQY) increases with increasing laser power, and that the PL lifetime decreases with increasing laser power, which is mainly due to the non-geminate recombination.

Efficient Light Emission Modulation of Electron–Phonon Coupling in Sb3+-Doped 2D A2CdCl4 by Varied Amine Molecules

“…This is similar to the simulated XRD spectra of the 2D BAH-Pb hybrid perovskite, both of which have many impurity phase peaks. 26,27 Figure 1e shows the XRD patterns of the (BAH) 2 CdCl 4 :x%Sb 3+ crystal powder. The XRD spectra of (BAH) 2 CdCl 4 :x%Sb 3+ are consistent with that of the undoped sample, indicating that the crystal structure and frame of the doped Sb 3+ remain unchanged.…”

Calculation Of Gruneisen Parameter, Compressibility, And Bulk Modulus as Functions Of Pressure In (C6H5CH2NH3)2 PBI4

“…2). Liu et al too report a sharp rise in the band gap at 7.7 GPa, caused by inorganic layer structure distortion (Liu et al, 2018). The discontinuity in the Grüneisen parameter and the sharp rising in the band gap in (PMA) 2 PbI 4 at 7.7 GPa was showed to be a isostructural phase transition due to the changes in the electronic structure of the studied HOIPs at this pressure.…”

Principle and Applications of the Coupling of Surface Plasmons and Excitons

“…They also studied the quantum electrodynamics in the cavity. Additionally, for the dipole moment of the transition of a single optical emitter material, e.g., perovskites [83,84], dye molecules and excitons in semiconductors, any type of optical transition that is associated with a given oscillator strength can be used for reaching the strong coupling regime [85]. For a general single-particle surface plasmon and a single emitter-coupled composite system, the whole system cannot achieve strong coupling; therefore, a strong coupling effect with the single emitter can only be achieved using the gap mode, with its stronger local limiting effect on the light.…”