Structural, luminescence and thermometric properties of nanocrystalline YVO4:Dy3+ temperature and concentration series

Abstract

We report systematic study of Dy3+-doped YVO4 nanophosphors synthesized via modified Pechini technique. Effect of calcination temperature and doping concentration on structure and luminescence has been investigated. XRD and Raman spectroscopy revealed preparation of single phase nanoparticles without any impurities. Synthesized nanopowders consisted of weakly agglomerated nanoparticles with average size about 50 nm. Photoluminescence spectra of YVO4:Dy3+ nanoparticles consisted of the characteristic narrow lines attributed to the intra-configurational 4f-4f transitions dominating by the hypersensitive 4F9/2–6H13/2 transition. The calcination temperature variation did not affect 4F9/2 lifetime, whereas increase of doping concentration resulted in its gradual decline. Potential application of YVO4:Dy3+ 1 at.% and 2 at.% nanopowders as ratiometric luminescence thermometers within 298–673 K temperature range was tested. The main performances of thermometer including absolute and relative thermal sensitivities and temperature uncertainty were calculated. The maximum relative thermal sensitivity was determined to be 1.8% K−1@298 K, whereas the minimum temperature uncertainty was 2 K.

Sensors for optical thermometry based on luminescence from layered YVO4: Ln3+ (Ln = Nd, Sm, Eu, Dy, Ho, Er, Tm, Yb) thin films made by atomic layer deposition

“…The TCS in YVO 4 : Dy 3+ was recently investigated, demonstrating a S max of 1.8% K −1 at 298 K, with a monotonic decrease to ca. 0.4% K −1 at 673 K 26 . Due to non-linear background intensity from the diode used in the present study in the 450 nm range, the 4 I 15/2 – 6 F 15/2 emission of Dy 3+ in the 455 nm range was challenging to determine accurately.…”

“…The addition of an YVO 4 : Dy 3+ layer on top of YVO 4 : Eu 3+ enhances S significantly in the 500–750 K range, with a maximum of 3.6% K −1 at 640 K. The FIR resulting from TCS on Dy 3+ is not included in Fig. 5e, but exhibits S of 0.9–1.8% K −1 below 400 K 26 , enabling high S over the entire 300–800 K range.…”

“…Highly crystalline YVO 4 is thus considered an optimal host. With YVO 4 as host material, either temperature sensitive emission or excited state lifetimes have been reported for Eu 3+ 25 , Dy 3+ 10,26 , Nd 3+ 27–30 , and co-doped Er 3+ /Yb 3+ 31,32 , or Er 3+ /Ho 3+ 33 . Previously, we determined that crystalline growth of YVO 4 can be achieved by using a 1-to-1 pulse ratio of Y(thd) 3 /O 3 and VO(thd) 2 /O 3 at 300 °C.…”

Калибровка Температуры По Нормированным Спектрам Ап-Конверсионной Флуоресценции Германатных Стекол И Стеклокерамик, Активированных Ионами Эрбия И Иттербия

“…Редкоземельные ионы в свою очередь обладают рядом преимуществ, таких как химическая инертность, устойчивость к радиационным центрам окраски, долговременная стабильность флуоресценции. Существует большое количество исследований, посвященных изучению оптической чувствительности ионов Eu, Dy, Ho, Er и Tm в различных стеклах [9][10][11][12][13]. Например, Er 3+ имеет два близко расположенных уровня энергии, соответствующие термически связанным переходам 2 H 11/2 , 4 S 3/2 → 4 I 15/2 в зеленой области спектра (около 520 nm и 550 nm) с небольшим энергетическим зазором (800 cm −1 ).…”

Luminescence Quenching Behavior of Hydrothermally Grown YVO4:Eu3+ Nanophosphor Excited under Low Temperature and Vacuum Ultra Violet Discharge

“…Yttrium orthovanadate, YVO 4 , is extensively used in laser hosts, lighting devices and displays due to its good thermal stability and advantageous mechanical and physical properties. In addition, it is well-known as one of the phosphor-producing host compounds incorporating several lanthanide ions [ 1 , 2 , 3 ]. Among these, Eu 3+ -activated YVO 4 is widely used as a red-emitting phosphor in cathode ray tubes (CRTs) and as an image scanning scintillator [ 4 , 5 , 6 , 7 ].…”