Full‐Spectrum Persistent Luminescence Tuning Using All‐Inorganic Perovskite Quantum Dots

Abstract

Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Enhanced Charge Separation for Efficient Photocatalytic H2 Production by Long-Lived Trap-State-Induced Interfacial Charge Transfer

“…It should be noted that the doping of Eu 2+ / Dy 3+ does not change the bandgap of SAO matrix but influencing the trap filling. 21,22 The broadened absorption band in visible region is attributed to the 4f 7 −4f 6 5d transitions of Eu 2+ ion. Upon 365 nm UV excitation, the SAO PLP presents bright cyanic blue emission with a quantum yield of 57.1% and an afterglow of more than 3 h (Figure S4 and S5).…”

“…In view of the overlap between the absorption spectrum of CdS NPs and the emission spectrum of SAO PLP (Figure S13), the quenched PL emission thus may be associated with energy or electron transfer from 5d states of Eu 2+ to CdS. 21 To further confirm this, we acquired time-resolved PL spectra (Figure S12b) at 150 K, which shows that the average PL lifetimes of Eu 2+ in both the SAO PLP and the SAO/CdS heterostructure are identical (ca. 17 μs).…”

“…It is well accepted that the afterglow brightness and the time of PLPs are determined by the trap depths (E p ) and the electron densities in trap states. 21 Thermoluminescence (TL) spectra (Figure S15) were thus used to validate the properties of trap states, where the SAO PLP and the SAO/CdS heterostructure just show a slight TL peak shift due to the different filling rates of the trap states with similar energies induced by the deposition of CdS NPs. 25 The essentially unchanged TL glow performance confirms unequivocally that SAO PLP dictates the electron storage and release processes for the persistent luminescence of SAO/CdS heterostructure.…”

“…In addition to the reduced PL intensity, we also observe that both afterglow intensity and time decrease remarkably in SAO/CdS heterostructure (Figure c). It is well accepted that the afterglow brightness and the time of PLPs are determined by the trap depths ( E p ) and the electron densities in trap states . Thermoluminescence (TL) spectra (Figure S15) were thus used to validate the properties of trap states, where the SAO PLP and the SAO/CdS heterostructure just show a slight TL peak shift due to the different filling rates of the trap states with similar energies induced by the deposition of CdS NPs .…”

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.…”