Improvement of blue, white and NIR emissions in YPO4:Dy3+ nanoparticles on co-doping of Li+ ions

Abstract

As-prepared samples of YPO(4):2Dy nanoparticles prepared by polyol route show strong blue luminescence because of strong host contribution, whereas 500 and 900 °C annealed samples show cold and warm white luminescence, respectively because of different energy transfer rates from host to Dy(3+). Li(+) co-doping improves luminescence intensity as well as crystallinity significantly. Interestingly, Li(+) ions occupy interstitial sites of lattice. These materials will be potential candidates for white light emitting diodes and near-infrared emitting phosphors.

Emerging cool white light emission from Dy3+ doped single phase alkaline earth niobate phosphors for indoor lighting applications

“…In addition, it is well-known that Dy 3+ ions with 4f 9 electronic configuration have complex energy levels and various possible transitions between f-f levels that are highly selective and exhibit sharp line spectra. 22 It gives emission in blue and yellow bands and the intensity ratio of these two emission bands depends on the host crystal structure. 23,24 In the current work, a series of Dy 3+ ion doped single-phase BaNb 2 O 6 phosphors have been prepared by a solid-state reaction method to explore their possibility as potential phosphors for white-LEDs by investigating photoluminescence and colorimetric properties in detail.…”

Luminescent properties of ZrO2:Dy3+ and ZrO2:Dy3++Li+ films synthesized by an ultrasonic spray pyrolysis technique

“…This fact contributes to carry out more affectively the energy transfer from the host lattice towards the Dy 3 þ ions, with which the intensity of the PL emission is notably improved. On the other hand, the presence of the Li þ ions could favor changes of the environment of the Dy 3 þ ions and with this induce a more efficient light generation [36][37][38]. The Cathodoluminescence is a very important phenomenon that is used in devices based on cathode ray tubes, and it is often very useful in the characterization of luminescent materials [39].…”

Arsenic detection in water: YPO4:Eu3+ nanoparticles

“…In this method EG performs the act of reaction medium as well as capping agent. Using this method Ningthoujam et al synthesised separated YPO 4 nanorods [33,34]. Liviano et al reported the formation of a mixture of spherical and elongated nanoparticles in a microwave assisted synthesis route in ethylene glycol medium [35].…”