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

Solvothermal preparation and fluorescent properties of color-tunable InP/ZnS quantum dots

“…The size distribution of as-synthesized InP QDs was quite broad owning to the combined factors of the non-injection-based solvothermal route and the slow pyrolysis of P(N(CH 3 ) 2 ) 3 compared to a widely used P(TMS) 3 , implying that the nucleation event is persistently concurrent with the growth one [4,5,20] (d) Absorption (inset) and normalized emission spectra of yellow-to-greenemitting InP/ZnS QDs with a core growth condition of 120 1C for 1 week and the same shell growth condition. All emission spectra were collected with an excitation wavelength of 420 nm.…”

“…Murase and coworkers demonstrated highly fluorescent, water-soluble InP/ZnS QDs with emission coverage of green-to-red, where solvothermally grown InP core QDs were overcoated with a ZnS shell by a UV illuminationassisted photochemical protocol in an aqueous phase [4]. Later, Byun et al further investigated the effects of post-synthetic treatments such as HF photo-etching, photo-radiation, and photochemical ZnS shell deposition on fluorescent efficiency of solvothermally prepared InP QDs [20]. Instead of the above aqueous phase-based, photochemical ZnS shell overcoating, our group previously reported a simple stepwise, one-pot solvothermal synthesis of red-to green-emitting InP/ZnS QDs with QYs of 24-60% [5].…”

One-pot synthesis and characterization of InP/ZnSe semiconductor nanocrystals

“…The Zn/In ratio of 1.47 confirms that the InP cores are covered by a ZnSe shell. Even higher ratios (2.34) have been reported for ZnS-capped InP nanocrystals [18].…”

The cytotoxicity studies of water-soluble InP/ZnSe quantum dots

“…The discouraging observation from their study was that the PL intensities of several of the fractions collected were very low and they attributed this to defects on the QD surface. A similar size sorting process was employed to separate InP nanocrystals in another study by Byun et al (2011a). They synthesized bare InP nanocrystals through a solvothermal process and subjected the product to size sorting.…”