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Title: Enhanced near infrared emission from the partially vitrified Nd{sup 3+} and silver co-doped zeolite Y

Near infrared (NIR) emission from the Nd{sup 3+} doped zeolite Y was strongly enhanced by partially vitrifying the zeolite structure via extra loading silver ions and post annealing. Under the low annealing temperatures at 450 °C and 650 °C, the states of the loaded silver were determined to be the co-existence of the isolated Ag{sup 0} atoms, the Ag{sup +} ions, and the Ag{sub 2}{sup +} dimers. However, there was no enhancement in the NIR emission by the introduction of these small silver clusters. Under higher annealing temperature at 900 °C where the lattice of the zeolite Y was partially collapsed into the amorphous phase, strong NIR emission enhancement at 1064 nm with a factor of 6.8 was observed. The partial vitrification process by the co-loading of silver and post heat-treatment had strong effect on eliminating the H{sub 2}O molecules, which can greatly enhance the NIR emission.
Authors:
; ; ;  [1]
  1. Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, Rokkodai, Nada, Kobe 657-8501 (Japan)
Publication Date:
OSTI Identifier:
22275742
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AMORPHOUS STATE; ANNEALING; DIMERS; DOPED MATERIALS; MOLECULES; NEAR INFRARED RADIATION; NEODYMIUM IONS; PHOTON EMISSION; SILVER; SILVER COMPOUNDS; SILVER IONS; TEMPERATURE DEPENDENCE; VITRIFICATION; ZEOLITES