Pyrene as emitting chromophore in organic–inorganic lead halide-based layered perovskites with different halides

Temperature dependence of the luminescence of nanocrystalline CdS/Mn2+

“…This effect is analogous to the so-called external heavy atom effect [23] observed for organic molecules. By interaction between a heavy atom with a strong spin-orbit coupling (such as I 2 [24], Tl þ [25] or rare earth ions [26]) the spin selection rule is partially lifted. As can be seen in Fig.…”

Excitonic Bands in the Spectra of Some Organic-Inorganic Hybrid Compounds Based on Metal Halide Units

“…The optical absorption (OA), photoluminescence (PL), photoluminescence excitation (PLE), and photoconductivity (PC) spectra of organic-inorganic hybrids exhibit excitonic bands in the UVNis spectral region; in the following, results from recent literature [1][2][3][4][5][6][7][8][9][10][11][12] are summarized. Figure 1 illustrates the peak positions in the OA spectra of several metal halide (inorganic) networks as well as the band positions and shapes in the OA spectra of the organic molecules in the hybrid systems.…”

“…3a) In the 2D systems in which the inorganic OA band is close to the organic OA band energy transfer has been found to take place [12], a kind of electronic interaction of the inorganic 2D network with the organic molecules [13]. This effect was especially observed in the low-temperature PL spectra of these systems [12]. If the inorganic excitonic line lies energetically between the organic first singlet (SI) and triplet (T1) levels, the emission is mainly an enhanced phosphorescence (PR) of the triplet state.…”

Low‐Dimensional Hybrid Perovskites Containing an Organic Cation with an Extended Conjugated System: Tuning the Excitonic Absorption Features

“…Pyrene derivatives have found different uses in hybrid perovskite‐related literature. Pyrene‐CH 2 −NH 3 + has been used as an emitting chromophore in chloride, bromide and iodide based 2D layered hybrid perovskites . In the recent work of Passarelli et al., pyrene derivatives (pyrene‐O−C n H 2n −NH 3 + ) were used in 2D layered perovskites to improve the out‐of‐plane conductivity of these materials.…”