Photoluminescence properties and energy-transfer of thermal-stable Ce3+, Mn2+-codoped barium strontium lithium silicate red phosphors

Luminescence properties and its red shift of blue-emitting phosphor Na3YSi3O9:Ce3+for UV LED

“…9 Na 3 YSi 3 O 9 crystallized in an orthorhombic system with space group of P2 1 2 1 2 1 (19). These compounds possesses a mixed octahedral-tetrahedral framework, where the YO 6 octahedrals are isolated from each other by SiO 4 tetrahedrals.…”

Luminescent properties of Na3Gd1−xEux(PO4)2 and energy transfer in these phosphors

“…Today, the WLED market is dominated by phosphor-converted WLEDs normally comprising a 450-470 nm blue InGaN LED chip covered by a yellow phosphor, which is usually made of YAG:Ce 3+ [7][8][9][10][11][12]. However, phosphorconverted WLEDs made by means of blue-LED + yellow phosphor suffer from the drawbacks such as halo effect due to the different emission characteristics of the LEDs (directional) and the phosphors (isotropic) [13], low color rendering index (CRI) and high color temperature caused by lack of red component in the spectra [2,7,[10][11][12]14,15]. White light can also be produced by another method, i.e., using a near ultraviolet (NUV) LED (370-410 nm) to stimulate the mixture of red, green and blue (RGB) phosphors [1][2][3]7,10].…”

Biocompatible fluorescent organic nanoparticles derived from glucose and polyethylenimine

“…However, GFP often suffers from poor photostability, small stokes shifts, easy enzyme degradation, and tedious transfection process [12]. Rare earth-doped nanoparticles and semiconductor quantum dots are other two important types of fluorescent bioprobes, which are endowed with high luminescent intensity and excellent resistance to photobleaching [13][14][15][16]. But their high cytotoxicity derived from the heavy metal ions and susceptibility to aggregate in cellular environments greatly hamper them for practical applications [17].…”