Related Experiment Video
Updated: Feb 13, 2026

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
Published on: May 19, 2019
Hydrothermal growth of Zn2 SnO4 :Eu,Ca for red emission
Krishna Sagar Chembanthodi Kuttykrishnan1, Junaid Bushiri Mohammed1
1Nano Functional Materials Laboratory, Department of Physics, Cochin University of Science and Technology, Cochin, Kerala, India.
Abstract:
Zinc stannate (Zn2 SnO4 ) and Zn2 SnO4 codoped with Eu3+ and Ca2+ (ZTO:Eu,Ca) were synthesized by hydrothermal method and characterized with X-ray diffraction (XRD), energy-dispersive X-ray analysis (EDAX), Raman spectrometer, field emission scanning electron microscopy (FESEM), ultraviolet-visible (UV-vis) and photoluminescence (PL) spectrophotometers. PL analysis of Zn2 SnO4 gives broad defect induced emission in the region 500-750 nm. The crystal structure of Zn2 SnO4 was retained even with a nominal doping of Eu, Ca and its combination in the Zn2 SnO4 . The Eu3+ ions were found to occupy the non-centrosymmetric sites of the Zn2 SnO4 and gave emissions at 592, 615 and 702 nm. Zn2 SnO4 :Eu,Ca showed red emission at 615 nm attributed to the electronic transition from the excited state 5 D0 → 7 F2 of the 4f6 configuration of Eu3+ . Nominal codoping of Eu3+ and Ca2+ ions promoted the quenching of orange emission from Eu3+ in Zn2 SnO4 :Eu,Ca.
Related Concept Videos
Emission Spectra
Red Algae
Positron Emission Tomography
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
Population Growth
Atomic Emission Spectroscopy: Lab
Molecular Spectroscopy: Absorption and Emission

