Optical and Surface Characterisation of Capping Ligands in the Preparation of InP/ZnS Quantum Dots

InP Quantum Dot-Organosilicon Nanocomposites

“…17 As mentioned above, in this case, when the fatty amine is used prior the formation of the InP QD, 2a,3,17 the photoluminescence properties of the QD are improved or unaffected, in contrast to the PL quenching observed in our study when APDMS is used to replace the original carboxylic acid. We think this contrast in the PL changes is due to the fact that the poorly passivated phosphine resulted from the stronger ligand-metal coordination, as discussed above, can be compensated by reacting with other indium carboxylate complexes available in the reaction solution in the first case, but cannot be re-passivated in the post ligand exchange case.…”

Solvothermal synthesis of InP quantum dots and their enhanced luminescent efficiency by post-synthetic treatments

“…The full-width-at-half-maximum (FWHM) values of the emission bands of all core/shell QDs ranged between 66 and 70 nm, which are broader than those (typically < 50 nm) of high-quality Cd-containing II-VI group QDs, indicating that the InP QDs synthesized in the present work was not so monodisperse as such II-VI QD counterparts. However, the FWHMs of our QDs were comparable to those (typically > 60-70 nm) of InP QDs synthesized using a highly toxic, expensive P source of P(TMS) 3 [2,3,5,8,[13][14][15]18]. …”

“…Even though the syntheses of InP QDs have been reported in the middle of 1990s [4][5][6][7], their progress was tardy compared to II-VI group QDs because of their synthetic difficulty presumably due to the covalent chemical nature of InP [4,6,8]. In the early phase of InP QD synthesis, strongly coordinating solvent system of trioctylphosphine oxide (TOPO)/trioctylphosphine (TOP) was commonly chosen [1,4,6,7,[9][10][11][12].…”

“…In the early phase of InP QD synthesis, strongly coordinating solvent system of trioctylphosphine oxide (TOPO)/trioctylphosphine (TOP) was commonly chosen [1,4,6,7,[9][10][11][12]. Since then, non-coordinating (e.g., octadecene) [2,3,5,8,[13][14][15][16][17] or weakly coordinating solvent (ester) [18] has been newly adopted with a variety of fatty acid ligands, resulting in better-quality InP QDs. Besides, by coating with a higher band gap material (typically ZnS), highly luminescent InP/ ZnS core/shell QDs with photoluminescence (PL) quantum yields (QYs) of 37-70% have been demonstrated [2,8,14,15,17].…”

Nanoparticles in Photodynamic Therapy

“…These optical properties make them interesting luminophores for bioimaging and other bio/ medical applications [14]. The detrimental effect of the highly toxic cadmium [15] -which is a component of the widely used CdSe QDs -might be avoided by using alternative materials such as InP [16][17][18].…”