Thermal enhancement of upconversion emission in nanocrystals: a comprehensive summary

Upconversion emission of BaTiO3 : Er nanocrystals

Here, we report the dopant concentration and pump-power dependence upconversion emission properties of erbium doped BaTiO3 nanocrystals derived from sol–emulsion–gel method. Green (550 nm) and red (670 nm) upconversion emissions were observed at room temperature from the 4 S3/2 and 4 F9/2 levels of Er 3+ : BaTiO3 nanocrystals. It is found that at 850 mW of cw excitation power (at 980 nm) the to...

Enhancement of Upconversion Emission of LaPO

Single-band upconversion emission in lanthanide-doped KMnF3 nanocrystals.

The preparation of upconversion (UC) nanocrystals that exhibit anti-Stokes emission is important for applications in fields as diverse as photonics, photovoltaics, biological imaging, and therapeutics. In particular, there has been an increasing focus on the synthesis of nanocrystals with tunable UC emission from ultraviolet to near-infrared through doping with lanthanide ions. However, the syn...

Plasmonic Enhancement of Emission from Si-nanocrystals

Plasmonic gratings of different periodicities are fabricated on top of Silicon nanocrystals embedded in Silicon Dioxide. Purcell enhancements of up to 2 were observed, which matches the value from simulations. Plasmonic enhancements are observed for the first three orders of the plasmonic modes, with the peak enhancement wavelength varying with the periodicity. Biharmonic gratings are also fabr...

Ag nanowires enhanced upconversion emission of NaYF4:Yb,Er nanocrystals via a direct assembly method.

Enhanced upconversion emission of NaYF(4):Yb,Er nanocrystals with Ag nanowires was observed; the enhancement factor of red emission is larger than that of green emission, and it can be further increased with Ag islands composed of larger Ag particles.