Linear optical afterglow and nonlinear optical harmonic generation from chiral tin(iv) halides: the role of lattice distortions

Abstract

The striking chemical variability of hybrid organic-inorganic metal halides (HOMHs) accords them fascinating optoelectronic properties. The inorganic skeletons of HOMHs are often flexible and their lattice deformations could serve as...

From H12C4N2CdI4 to H11C4N2CdI3: a highly polarizable CdNI3 tetrahedron induced a sharp enhancement of second harmonic generation response and birefringence

“…In 3a). These values are higher than those of previously reported NLO organic-inorganic halides, including (H 7 C 3 N 6 )(H 6 C 3 N 6 )HgCl 3 (225 °C), 16 (CH 3 NH 3 )GeBr 3 (500 K), 30 67 and (CH 3 NH 3 )GeBr 3 (2.91 eV). 30…”

Realizing efficient emission and triple‐mode photoluminescence switching in air‐stable tin(IV)‐based metal halides via antimony doping and rational structural modulation

“…In the process of excited state recombination, a higher degree of lattice distortion will increase the nonradiative loss of excitation energy, thus effective quenching of luminescence, and vice versa. [ 41–43 ] Hence, the Sb 3+ −1 with the maximum distortion degree exhibits negligible emission, while Sb 3+ −2α and Sb 3+ −2β with moderate lattice distortion exhibit an efficient emission. Recently, many studies have shown that the large distance of M–M (M = Pb 2+ , Sn 2+ , Mn 2+ , Sb 3+ , Bi 3+ ) will increase the PLQY, which should be attributed to the inhibition of concentration quenching.…”

Homochiral Chemistry Strategy to Trigger Second-Harmonic Generation and Dual Dielectric Switches

“…Switchable materials are substances that can switch between two different states under external stimuli such as heat, light, external electric field, and magnetic fields; their physical properties change with the change of states. − These materials can be widely used in various fields such as communication transmission, information storage, and photonic carriers. − Dielectric switches are mostly appearing in structural phase transition materials, where the dielectric constant changes abruptly near the phase transition temperature ( T h ) and reversible cycling occurs. − For example, (DMTBA) 3 Bi 2 Br 9 (DMTBA = N , N -dimethyl- tert -butylaminiu) was reported to have a pair of reversible phase transitions at 188 and 425 K and exhibited excellent dielectric switching properties − However, a single dielectric switch also limits the application scenarios for the material.…”