Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes
Haomiao Zhu,Chun Che Lin,Wenqin Luo,Situan Shu,Zhuguang Liu,Yongsheng Liu,Jintao Kong,En Ma,Yongge Cao,Ru-Shi Liu,Xueyuan Chen +10 more
TLDR
These findings show great promise of K2TiF6:Mn(4+) as a commercial red phosphor in warm white LEDs, and open up new avenues for the exploration of novel non-rare-earth red emitting phosphors.Abstract:
Manganese-activated fluoride phosphors for high-efficacy warm white light-emitting diodes have been limited by low photoluminescence quantum yields. Here, Zhu et al. use an efficient cation exchange reaction to synthesize manganese phosphors with photoluminescence quantum yields as high as 98%.read more
Citations
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Journal ArticleDOI
Progress in discovery and structural design of color conversion phosphors for LEDs
Zhiguo Xia,Quanlin Liu +1 more
TL;DR: In this paper, a review of the recent advances in the discovery and structural design of LED phosphors is presented, including the discovery of the novel phosphors from the existing structural models, discovery of new crystal materials by doping and structural modification of the known phosphors.
Journal ArticleDOI
Recent progress in luminescence tuning of Ce3+ and Eu2+-activated phosphors for pc-WLEDs
TL;DR: This review article concerns commonly used rare earth ion (Eu(2+) and Ce(3+)) activated inorganic phosphors, highlighting the important effect of spectral tuning via local structural variations on improving the luminescence performance of phosphors.
Journal ArticleDOI
A zero-thermal-quenching phosphor
Yoon Hwa Kim,Paulraj Arunkumar,Bo Young Kim,Sanjith Unithrattil,Eden Kim,Su Hyun Moon,Jae Young Hyun,Kihyun Kim,Donghwa Lee,Jong-Sook Lee,Won Bin Im +10 more
TL;DR: A blue-emitting Na3-2xSc2(PO4)3:xEu2+ phosphor that does not exhibit thermal quenching even up to 200 °C is reported, which could initiate the exploration of phosphors with zero thermalQuenching for high-power LED applications.
Journal ArticleDOI
Down-Conversion Nitride Materials for Solid State Lighting: Recent Advances and Perspectives.
TL;DR: The state-of-art progress on this novel family of luminescent materials is summarized and the topics of materials discovery, crystal chemistry, structure-related luminecence, temperature-dependent luminescence, and spectral tailoring are discussed.
Journal ArticleDOI
Recent developments in the new inorganic solid-state LED phosphors
TL;DR: An overview of the recent developments of LED phosphor systems is presented and methodologies for the discovery of new LED phosphors by mineral-inspired prototype evolution and new phase construction, as well as combinatorial optimization screening, and the single-particle-diagnosis approach are analyzed and exemplified.
References
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Journal ArticleDOI
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
TL;DR: The effective ionic radii of Shannon & Prewitt [Acta Cryst. (1969), B25, 925-945] are revised to include more unusual oxidation states and coordinations as mentioned in this paper.
Journal ArticleDOI
Solid-State Light Sources Getting Smart
E. Fred Schubert,Jong Kyu Kim +1 more
TL;DR: The high efficiency of solid-state sources already provides energy savings and environmental benefits in a number of applications, but these sources also offer controllability of their spectral power distribution, spatial distribution, color temperature, temporal modulation, and polarization properties.
Journal ArticleDOI
On the Absorption Spectra of Complex Ions II
Yukito Tanabe,Satoru Sugano +1 more
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 The values of B and C (Racah's parameters) there needed are determined from the observed spectras of free ions or in some cases by extrapolation The f -values of the transitions which connect energy levels calculated are estimated and compared with the observed intensities.
Book
Optical spectroscopy of inorganic solids
Brian Henderson,G. F. Imbusch +1 more
TL;DR: In this article, the authors present symmetry and group representation theory for Inorganic Solids and Spectroscopy of Lanthanide (rare-earth) and Actinide Ions in Solids.
Journal ArticleDOI
Temperature Quenching of Yellow Ce3+ Luminescence in YAG:Ce
TL;DR: In this paper, the luminescence quenching temperature of Yttrium aluminum garnet (YAG) doped with Ce3+ is measured and analyzed for a wide range of Ce concentrations (between 0033% and 33%).