Energy transfer between semiconductor nanoparticles (ZnS or CdS) and Eu3+ ions in sol–gel derived ZrO2 thin films

Optical spectroscopy of Nd3+ ions in a nanostructured glass matrix

“…The effect is due to the higher absorption cross-section of semiconductor NCs when compared to those of rare earth ions [7]. Particularly, the absorption band of CdS NCs can be tuned according to CdS NCs dimensions.…”

Fluorescence enhancement of Ln3+ doped nanoparticles

“…Eu 3+ was the most popular ion for luminescence emission enhancement by semiconductor nanoparticles. Enhancement induced by energy transfer between ZnS or CdS nanoparticles and Eu 3+ ions in ZrO 2 thin films was presented by Ehrhart et al [28]. The authors proposed that energy transfer between the nanoparticles and Eu 3+ ions was due to the formation of exciton and surface defect state of the particles.…”

Synthesis and Characterization of Europium-Doped Zinc Sulphide (ZnS:Eu) Nano Particles: Nano Red Phosphor

“…20 These peaks are however very weak and leads to weak emissions of red light from Eu 3+ at 614 nm ( 5 D 0 → 7 F 2 ), nevertheless, the presence of these bands in the excitation spectra strongly suggest energy transfer from the ZnS host to the Eu 3+ ions. [21][22][23] The other lower energy peaks at 362-534 nm corresponds to the resonant excitation bands of Eu 3+ ions.…”