Author
Cuili Chen
Bio: Cuili Chen is an academic researcher from Pukyong National University. The author has contributed to research in topics: Luminescence & Phosphor. The author has an hindex of 12, co-authored 37 publications receiving 505 citations.
Papers
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TL;DR: The maximum sensor sensitivity of Y2MgTiO6:Mn4+ is determined to be as high as 0.001 42 K-1 at 153 K, which demonstrates potential applications for the optical thermometry at low-temperature environments.
Abstract: Mn4+-doped Y2MgTiO6 phosphors are synthesized by the traditional solid-state method. Powder X-ray diffraction, scanning electron microscope, and energy-dispersive X-ray spectrometer are employed to...
138 citations
TL;DR: A novel red emitting Cs2WO 2F4:Mn4+ phosphor was successfully synthesized by a two-step wet chemical method and the mechanism of energy transfer from [WO2F4]2- (the sensitizer) to Mn4+ (the activator) is discussed.
Abstract: A novel red emitting Cs2WO2F4:Mn4+ phosphor was successfully synthesized by a two-step wet chemical method. The crystal structure, morphology, and elemental composition were confirmed by powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS), respectively. The luminescence properties were investigated from emission, excitation and luminescence decay curves in the temperature region of 10-500 K. The application of non-contact optical thermometry of Cs2WO2F4:Mn4+ based on the fluorescence intensity ratio (FIR) of the two coupled anti-Stokes and Stokes sidebands is discussed. The as-prepared Cs2WO2F4:Mn4+ phosphor shows a bright narrow red emission at 632 nm under excitation by a blue lamp at 470 nm and it also presents a broad and yellow-white intrinsic tungstate emission (∼520 nm) under UV excitation. The mechanism of energy transfer from [WO2F4]2- (the sensitizer) to Mn4+ (the activator) is discussed.
67 citations
TL;DR: In this article, a series of Mn4+-activated LiLa2NbO6 red emitting phosphors were prepared by the solid state method, and the structural and luminescence properties were investigated on the basis of X-ray diffraction (XRD), emission and excitation spectra, and lumininescence decay curves.
52 citations
TL;DR: In this paper, a modified Pechini method was used to obtain an Aurivillius-type photocatalyst of Bi4V2O11 nanoparticles with an average particle size of 45nm.
32 citations
TL;DR: In this paper, the photoluminescence excitation spectra (PLE) and emission spectra, decay curves and lifetimes of polycrystalline phosphors were investigated.
31 citations
Cited by
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TL;DR: In this article, a direct Z-scheme graphitic carbon nitride (g-C 3 N 4 )/silver tungstate (Ag 2 WO 4 ) photocatalyst was prepared by a facile in situ precipitation method using g-C3 N 4 as a support and silver nitrate as a precursor.
580 citations
TL;DR: An overview of recent studies on transition metal activated phosphors can be found in this article, including detailed synthesis routes (solid-state reaction and wet-chemical synthesis) and description of luminescence mechanisms and phosphors' behaviors; discuss their promising applications in white light-emitting diodes.
Abstract: Transition-metal activated phosphors are an important family of luminescent materials that can produce white light with an outstanding color rendering index and correlated color temperature for use in light-emitting diodes. In recent years, work in this quite “hot” research field has focused on the development of Mn2+ and Mn4+ activated red phosphors. In this review article, we provide an overview of recent studies on Mn2+ and Mn4+ doped phosphors, including detailed synthesis routes (solid-state reaction and wet-chemical synthesis) and description of luminescence mechanisms and phosphors’ behaviors; discuss their promising applications in white light-emitting diodes; and present an extensive list of references to representative works in this field.
447 citations
Journal Article•
TL;DR: In this paper, the authors solved the energy levels which are important in the absorption spectra of the normal complex ions, leaving the crystalline field strength as a parameter, and calculated positions of lines and bands are rather in good agreement with the experimental data in divalent ions [MX 6 ] 2+ (M=Cr, Mn, Fe, Co, Ni), when they adjust the crystallINE field parameter D q suitably.
Abstract: The secular determinants obtained in the previous paper are solved for the energy levels which are important in the absorption spectra of the normal complex ions, leaving the crystalline field strength as a parameter. The values of B and C (Racah's parameters) there needed are determined from the observed spectra of free ions or in some cases by extrapolation. The f -values of the transitions which connect the energy levels calculated are estimated and compared with the observed intensities. The difference of the spectral width among absorption bands and lines is also considered using the energy diagram obtained. Following the assignments determined by the above considerations, the calculated positions of lines and bands are rather in good agreement with the experimental data in divalent ions [MX 6 ] 2+ (M=Cr, Mn, Fe, Co, Ni), when we adjust the crystalline field parameter D q suitably. In trivalent ions [MX 6 ] 3+ (M=Ti, V, Cr, Mn, Fe), it is necessary besides the adjustment of D q to use smaller values ...
363 citations
TL;DR: In this article, a series of broadband UV-excited and dual-emitting LaOBr: Ce3+, Tb3+ phosphors were synthesized by solid state reaction.
223 citations
TL;DR: In this article, a survey on the design, synthesis and luminescence properties of different perovskites is presented, including halide perovsites, oxide perovksites, and lanthanide- or transition metal-doped pervskites, also including dimension-different perov-skites (3D, 2D, 1D and quantum dots).
Abstract: Perovskites form an important and enormous class of inorganic compounds. Recently, perovskite materials have attracted extensive research interest owing to their excellent optoelectronic properties. Deep insights into the relationships between the crystal structure, electronic structure and properties play an important role in the development of new functional materials and high-performance devices. In this review, after a brief introduction, we first discuss the crystal structure and crystal chemistry of perovskites according to their three classes: standard perovskites, low-dimensional perovskites and perovskite-like halides. Next, the electronic structure and luminescence from different physical origins are presented. Then, we present a survey on the design, synthesis and luminescence properties of different perovskites, including halide perovskites, oxide perovskites, and lanthanide- or transition metal-doped perovskites, also including dimension-different perovskites (3D, 2D, 1D and quantum dots). We also summarize the strategies for improving the photoluminescence quantum yield (PLQY) and chemical stability, including by surface passivation, encapsulation and doping. Finally, we review their applications and give a brief outlook.
171 citations