Highly efficient room-temperature phosphorescence and afterglow luminescence from common organic fluorophores in 2D hybrid perovskites

Abstract

A simple and effective strategy on producing solution-processable materials with highly efficient and persistent room-temperature-phosphorescence (RTP) is presented here.

Tunable internal quantum well alignment in rationally designed oligomer-based perovskite films deposited by resonant infrared matrix-assisted pulsed laser evaporation

“…The singlet-triplet transition is forbidden in the neat organic chromophore, but can be enabled in the hybrid material if the carriers cascade through appropriate inorganic states. 18,22,25 In this sense, resulting hybrid quantum well structures may transcend the traditional inorganic quantum well model and involve synergistic organic-inorganic interactions.…”

“…However, involvement of the organic cation can introduce additional subtlety through participation of the organic triplet state(s), enabling behaviors unique to hybrid quantum well systems-i.e., band alignment may favor exciton transfer to singlet states, resulting in fluorescence from organic chromophores, 16,17,20,21 or exciton transfer through inorganic bands to triplet states, potentially resulting in phosphorescence. 18,[22][23][24][25] An unprecedented degree of control over the excited state is therefore attainable in these perovskites, and by extension other prospective hybrid systems. The uniqueness of both the atomic structure and properties, as neither inorganic nor organic but possessing new characteristics derived from the synergy of these components, implies that these compounds represent a new and distinct class of materials.…”

Luminescence anti‐counterfeiting: From elementary to advanced

“…Based on the category of regulation factors, multilevel luminescence anti‐counterfeiting can be divided into five types: (1) regulated by excitation light; [ 64–80 ] (2) co‐regulated by excitation light and luminescence lifetime; [ 81–92 ] (3) co‐regulated by excitation light and heat stimuli; [ 35,63,93–96 ] (4) co‐regulated by excitation light and chemical reagents; [ 16,97–105 ] and (5) co‐regulated by other factors. [ 106–121 ]…”

Enhanced Long Persistent Luminescence by Multifold Interpenetration in Metal–Organic Frameworks

“…Solid-state luminescent materials with long persistentl uminescence (LPL) have attractede xtensive interestd ue to their fascinating photophysical phenomenaa nd potential applicationsi n bio-imaging, [1][2][3][4] photodynamic therapy, [5,6] anticounterfeiting, [7][8][9][10] OLEDs, [11] photocatalysis, [12,13] and so on. Many materials with LPL characteristics have been studied, such as inorganic oxide materials, [14][15][16] perovskites, [17,18] polymers, [19][20][21] pure organic phosphors, [8,[22][23][24] and metal-organic materials. [25,26] MOFs have attracted special attention due to their flexible structural design and outstanding properties.…”