Temperature Dependent Hydrogen Bond Toward High Emission in an Emerging Indium‐Based Perovskite

Abstract

Low‐dimensional organic–inorganic hybrid perovskites (OIHPs) with broadband emission attract immense scientific interest due to their potential application for the next generation of solid‐state lighting. However, due to low exciton utilization, organic cations generally adjust structure rather than contribute the band edge to affect optical properties. Based on this, OIHPs are usually allowed to obtain a low photoluminescence quantum yield (PLQY). Herein, a good charge transfer carrier (p‐phenylenediamine, PPDA) as organic cation is rationally employed and a novel indium‐based perovskite is synthesized. By coupling with H2O molecules, a strong interaction between organic and inorganic components is realized by hydrogen bonding, which has good transportability and greatly improves the exciton utilization. The regions of hydrogen bonding show high electron mobility, combined with the induced recombination center, improving the progress of charge relaxation. As a result, the regulation of hydrogen bond strength based on the microstructure optimization directly determines the optical emission intensity, realizing nearly 100% PLQY. Further, the polyhydrogen bond structure makes each component a stronger interaction, showing high stability in polar, organic, and acidic solvent, as well as long‐term storing, which represents one of the highest overall performances for lighting in OIHPs.

Regulating Exciton Diffusion in Antimony‐Based Perovskite‐Like Single Crystals toward Highly Efficient and Stable Luminescence

“…Eight layers of Ag atoms were used to form the buffer region, which was set to prevent the Hartree potential from the scattering region from mixing with that generated by the electrode itself and thus interference with the self‐consistent electrode calculation. [ 41 ] The central scattering region was composed of (8‐HQ) 2 SbCl 3 and (8‐HQH)SbCl 4 structure. Electrons and holes transport along the direction of (001) plane ( z direction).…”

Regulation and application of organic luminescence from low-dimensional organic–inorganic hybrid metal halides

“…Recently, Li et al demonstrated a novel 0D In-based OIMH (PPDAH 2 ) 2 InCl 7 by choosing p -phenylenediamine as the organic cation. 143 X-ray diffraction analysis indicated that the presence of H 2 O in the lattice contributes to strong interactions between the organic and inorganic components through hydrogen bonding, thereby leading to superb stability and a high PLQY of (PPDAH 2 ) 2 InCl 7 . Experimental and theoretical investigation manifested that the changes in the lengths of hydrogen bonds take responsibility in the linear dependence between temperature and the fluorescence intensity of (PPDAH 2 ) 2 InCl 7 .…”

Hydrogen Bond-Driven Displacive Phase Transition and the Abrupt Optical/Magnetic Behavior in One-Dimensional Mn(II) Chloride Hybrid

“…7−11 Temperature-dependent H-bond interactions are found to be closely related to the quenching or enhancing of delocalized exciton emission in the hybrid semiconductors, bridging via the structure variation. 12, 13 Yet the study on temperature-dependent photoluminescence (PL) of the localized luminescent center Mn 2+ and its relation with hydrogen bonding variation have been barely reported. Moreover, strong antiferromagnetic (AFM) coupling among the neighboring Mn 2+ ions in the lattice could result in strong thermal quenching of the spin-related PL, 14 but it remains uncertain in the Mn(II) hybrids with H-bonds commonly found in such soft matter of hybrids.…”

“…As organic–inorganic hybrids advance by leaps and bounds in the field of photoelectric devices, the H-bond interaction between inorganic species and organic molecules arouse more and more attention owing to its capacity of regulating the phases and electronic and optical properties. − For instance, it is found that the strength of the H-bond interaction plays a pivotal role in the order–disorder phase transition in nonlinear optical switch material of [Ag­(NH 3 ) 2 ] 2 SO 4 , leading to the switching performance with strong room-temperature second harmonic generation intensity . It is also reported that stronger H-bond interaction devotes to a more rigid structure, benefiting reduced nonradiative transition rates and improved room-temperature photoluminescence quantum yield (PLQY) in the hybrids. − Temperature-dependent H-bond interactions are found to be closely related to the quenching or enhancing of delocalized exciton emission in the hybrid semiconductors, bridging via the structure variation. , Yet the study on temperature-dependent photoluminescence (PL) of the localized luminescent center Mn 2+ and its relation with hydrogen bonding variation have been barely reported. Moreover, strong antiferromagnetic (AFM) coupling among the neighboring Mn 2+ ions in the lattice could result in strong thermal quenching of the spin-related PL, but it remains uncertain in the Mn­(II) hybrids with H-bonds commonly found in such soft matter of hybrids.…”