Synthesis and Characterization of the Nonlinear Optical Properties of Novel Hybrid Organic–Inorganic Semiconductor Lead Iodide Quantum Wells and Dots

Abstract

Synthesis and characterization of the nonlinear optical properties of a class of semiconductors based on hybrid organic–inorganic two-dimensional semiconductors are being reported. A new simple synthetic route for the preparation and stabilization of lead iodide quantum dots (QD), based on (PbI6)4– structural units, provided a variety of appropriate solutions of zero-dimensional (0D) and suspensions of two-dimensional (2D) hybrid organic–inorganic semiconductors. The third-order nonlinear optical properties of both semiconducting systems were studied by means of the Z-scan technique under visible (532 nm) and infrared (1064 nm), 35 ps and 4 ns laser excitation. The third-order susceptibility χ(3) and second-order hyperpolarizability γ were determined and are reported for the first time, showing gigantic enhancement in the case of the 2D material, reaching at least 5 orders of magnitude higher NLO response than that of the 0D material QDs, suggesting their potential for photonic and optoelectronic applications and devices.

Room temperature light emitting diode based on 2D hybrid organic-inorganic low dimensional perovskite semiconductor

“…16.5Å. The low angle peaks are due to the superlattice formed by the alternating organic and inorganic layers [29].…”

“…It is conjectured that future studies of the perovskite systems with more detailed micro and/or nano photoluminescence experiments, taking into account physical parameters, may yield nanoscale LEDs of enhanced performance [27,28]. 2.2 Synthesis: Synthetic route was followed as reported in [29,30] and analogous to those in The ITO coated substrates were cleaned by immersion in piranha solution for 4 minutes and rinsed with 18MΩ water. No electron and hole injection layers were employed above or below the semiconductor layer, although this is possible.…”

High‐Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on a (p‐FC6H4C2H4NH3)2[PbI4] Capping Layer

“…A stabilized PCE of 20.64% (certified stabilized PCE of 19.77%) was achieved. [33] Encouraged by this result and enlightened by the advantage of increasing photostability by fluorinated aromatic ammonium iodide, [34][35][36][37][38][39] in the present study, we introduce 2-(4-fluorophenyl)ethylamine (FPEA: 4-FC 6 H 4 C 2 H 4 NH 3 ) bulky cation to grow a 2D perovskite overlayer on the top of the Cs/FA/MA triple-cation 3D perovskite to combine the high stability of 2D perovskite with high efficiency of 3D perovskite simultaneously. This was corroborated by the report from Niu et al that remarkable long-term ambient stability was achieved with a t 80 lifetime exceeding 2880 h without encapsulation.…”

Extending the Lifetime of Perovskite Solar Cells using a Perfluorinated Dopant

“…For example, there have been several reports on the application of fluorinated ammonium-based cations for 2D perovskites [25][26][27] with some fluorinated aromatic ammonium iodides leadingt oa no bserved increased photostability. For example, there have been several reports on the application of fluorinated ammonium-based cations for 2D perovskites [25][26][27] with some fluorinated aromatic ammonium iodides leadingt oa no bserved increased photostability.…”