Electronic structures and Eu3+ photoluminescence behaviors in Y2Si2O7 and La2Si2O7

Photoluminescence properties of (Ba1−xEux)WO4 red synthesized by the coprecipitation/calcination method

“…The investigated results indicate that the (Ba 1−x Eu x )WO 4 phosphor is a promising red phosphor for both near-UV and blue based white LED. The growth and PL emission mechanism of (Ba 1−x Eu x )WO 4 have been analysed in the present work. The concentration quenching mechanism can be explained by the dopant inducing the non-radiative mechanism.…”

“…The growing interest in Eu(III) activated red phosphors is due to its high quantum efficiency, good stability and suitability for use in white light-emitting diodes (W-LEDs) [1][2][3][4][5]. However, the performance of the W-LEDs depends critically on the quality of tri-color phosphor stand or fall, which in turn depends on the host lattice.…”

Revealing Structural Detail in the High Temperature La2Si2O7–Y2Si2O7 Phase Diagram by Synchrotron Powder Diffraction and Nuclear Magnetic Resonance Spectroscopy

“…They exhibit interesting optical and mechanical properties. When doped, they have been shown to display promising luminescent responses for applications such as plasma displays, laser materials, and high-energy phosphors. − Of particular interest are the disilicates of Y, La, and Gd because these ions possess no electrons in the 4f shell, or in the case of Gd, the shell is half filled, and therefore, the three are optically inert in the visible and near-ultraviolet regions of the spectrum. Several studies have shown the importance of the crystalline structure adopted by the matrix silicate as well as the distribution of the dopants among the available RE crystallographic sites on the luminescent yield of these disilicate compounds. − …”

Synthesis of Scintillating Ce3+-Doped Lu2Si2O7 Nanoparticles Using the Salt-Supported High Temperature (SSHT) Method: Solid State Chemistry at the Nanoscale

“…28,29 Recently, its photoluminescence properties were explored by doping it with Ce 3+ , Tb 3+ , and Eu 3+ , which resulted in strong X-ray luminescence, a fast decay time, and good thermal stability. 30,31 These pyrosilicate compounds have been synthesized using a variety of methods, including single crystal growth, sol−gel, hydrothermal, solid state, and ceramic methods as well as nanocrystallization methods for glass. 17,32−36 The major drawback of most of these procedures is the long time required for calcination, and in addition, this long calcination time results in large, aggregated, sintered particles.…”

“…Scintillatorsmaterials that can both absorb high energy radiation and convert this energy into excited states in active luminescence centers for light emissionhave many uses ranging from X-ray phosphors to PET and CT scanners, X-ray and neutron detectors, homeland security for improved nuclear detection systems, and other diverse medical applications. − Among scintillators, the lanthanide pyrosilicate compounds (Ln 2 Si 2 O 7 ) (Ln = lanthanide) doped with active lanthanide ions (Ce 3+ , Tb 3+ , and Eu 3+ ) are among some of the most promising scintillators known. , Lu 2 Si 2 O 7 :Ce 3+ is a promising scintillator material which has high light outputs without afterglow, fast scintillation decay times, and stable light outputs at high temperature. − In comparison to most other scintillating materials, such as lanthanide orthosilicates, LnSiO 5 , and lanthanide aluminates, such as Ln 3 Al 5 O 12 and LnAlO 3 , the pyrosilicates display lower crystallization temperatures and good thermal stability. − Among all of the pyrosilicate phases known, Y 2 Si 2 O 7 and Lu 2 Si 2 O 7 have been the most studied phases due to their high light output under X-ray irradiation, while Gd 2 Si 2 O 7 :Ce 3+ is of interest due to its short decay time and low afterglow level. − By comparison, La 2 Si 2 O 7 :Ce 3+ is used significantly less frequently as a host matrix due to synthetic challenges. , Recently, its photoluminescence properties were explored by doping it with Ce 3+ , Tb 3+ , and Eu 3+ , which resulted in strong X-ray luminescence, a fast decay time, and good thermal stability. , …”