Polymer spacer tunable Purcell-enhanced spontaneous emission in perovskite quantum dots coupled to plasmonic nanowire networks

Abstract

Bright and fast emission of perovskite quantum dots has been demonstrated by using a polymer spacer to regulate the exciton–plasmon coupling.

Strong Purcell enhancement at telecom wavelengths afforded by spinel Fe3O4 nanocrystals with size-tunable plasmonic properties

“…Rather than a polymer spacer that can have inconsistent thickness after deposition and can influence QD lifetime due to the passivation of surface defects (Fig. S11, ESI †), 40,41 we selected two different types of amorphous chalcogenide materials-Ge 23 Sb 7 S 70 (GSS) and Ge 2 Sb 2 Se 4 Te (GSST)-and aluminum oxide (AlOx) as spacer layers. These materials were chosen because they are deposited with precision via singlesource thermal evaporation (GSS/GSST) 42,43 or atomic layer deposition (AlOx) [44][45][46][47] near or at room temperature, respectively, which avoids damage to the sp-MO NC layer.…”

From static to active photoluminescence tuning: functional spacer materials for plasmon–fluorophore interaction

“…The success of this approach is demonstrated for various spacer materials, including inorganic materials, 104 biospacers, 79,105 liquid crystals, 90 and polymeric films. 64,66,70 The reported systems are, in essence, mostly None PL intensity enhancement [50][51][52][53][54][55][56][57][58] /quenching 52,54,56 PL lifetime 50,51,53,54,56,57,59,60 PL detection sensitivity in different optical configuration 55 Temperature dependent PL enhancement and wavelength shift (4 to 300 K) 61 Surface plasmon(SP)-exciton, exciton-SP, and exciton-SP-photon conversion 62 Energy transfer time 54 Excitation-wavelength-dependent PL enhancement 54 PL polarization 58 /directionality 58 Up-conversion emissions enhancement 60 Radiation pattern 59 Purcell factor 59 Organic (PVA, PMMA, PS,. .…”

“…PL intensity enhancement 9,44,[63][64][65][66][67][68][69][70][71][72] /quenching 44,68,70,71,73,74 /quenching efficiency 75,76 PL lifetime 9,66-70,74-77 Purcell factor 9,66,68 Excitation/absorption 9,69,76 Quantum yield 66 Emission-excitation contours 69 DNA detection 72 Energy transfer 74 Photon-correlation histogram 77 Multiexciton radiative rate of single QD 77 Biomolecular spacer (DNA, peptides)…”

“…111 Tawa et al 55 functionalized Ag chips with a SiO 2 layer (8 to 300 nm) and modified the surface with Ag nanowire 53,62 CdSe QDs 53,54 Plasma deposition 62 4 to 30 53 10.4(20) 51 AgNPs layer 50,54 CdSeTe-ZnS QDs 62 High-pressure Ba-BN solvent method 50 25 62 2.2(80) 52 Ag 58 /Au 60 film Rhodamine B 50,58 Liquid exfoliation plus spin-coating 58 2 to 20 54 20(15) 53 Au patch antenna 59 NaYF4:Yb,Er,Gd nanorods 60 Electron-beam evaporation 52 10 to 14 50 95(12) 50 Vertically aligned Au nanorod 51 CdSe-CdS QDs 59 0 to 25 60 192(10) 60 Au nanocage 52 LD 700 perchlorate dye 52 5 to 50 51 30 to 110 52 3-aminopropyltriethoxysilane (APTES) by a silane-coupling reaction. Next, biotin-poly[ethylene glycol-succinimide] was applied for biotinylation, which enabled the immobilization via the complementary Cy5-streptavidin dyes through biotin-streptavidin (Poly[vinylalcohol]) 66,68 Spincoating 9,63,65,66,68,70,71,74,76,77 5 to 20 9 14.2(10) 9…”

Plasmonic–perovskite solar cells, light emitters, and sensors

“…Li et al studied the performance of perovskite QD (PQD) films coupled to Ag NW networks (NWKs) with a spacer of polyvinyl alcohol (PVA) between the PQD film and NWKs 147 . Compared with bare quartz, the PVA substrate significantly enhanced the emission intensity but reduced the emission rate of PQD excitons.…”