Journal ArticleDOI
Direct synthesis and properties of K2SiF6:Mn4+ phosphor by wet chemical etching of Si wafer
Sadao Adachi,Toru Takahashi +1 more
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TLDR
In this paper, a new method of synthesizing Mn-activated phosphor was presented using only chemical etching of Si wafer in HF/H2O solution with the addition of an oxidizing agent KMnO4.Abstract:
A new method of synthesizing Mn-activated phosphor is presented The method uses only chemical etching of Si wafer in HF/H2O solution with the addition of an oxidizing agent KMnO4 The luminescence centers of red emission are ascribed to Mn4+ ions in the octahedral sites of potassium hexafluorosilicate (K2SiF6) The luminescence intensity becomes much stronger at higher temperatures, without largely changing its spectral featureread more
Citations
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Journal ArticleDOI
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
TL;DR: 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.
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
HF-Free Hydrothermal Route for Synthesis of Highly Efficient Narrow-Band Red Emitting Phosphor K2Si1–xF6:xMn4+ for Warm White Light-Emitting Diodes
TL;DR: In this paper, a green synthetic route to synthesize narrow red emitting K2SiF6:Mn4+ without the usage of toxic and volatile HF solution is reported.
Journal ArticleDOI
Mn4 + -Activated Red Photoluminescence in K2SiF6 Phosphor
Toru Takahashi,Sadao Adachi +1 more
TL;DR: In this paper, the optical properties of K 2 SiF 6 were reported and the luminescence centers of sharp red emission at ∼630 nm were ascribed to the Mn 4+ ions in the octahedral site.
Journal ArticleDOI
On the optical properties of the Mn4+ ion in solids
TL;DR: A review of the optical properties of Mn4+ ions in a number of host lattices is presented in this article, where a simple criterion is proposed, which can effectively and easily describe ionicity/covalency of the Mn4-doped crystals.
References
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Journal ArticleDOI
Topology of the pyroxenes as a function of temperature, pressure, and composition as determined from the procrystal electron density
TL;DR: In this paper, the distribution of bonds associated with the M2 sites in various well-ordered pyroxene minerals is determined using a topological analysis of electron density in the manner proposed by Bader.
Journal ArticleDOI
Visible luminescence from silicon wafers subjected to stain etches
TL;DR: In this article, the luminescence spectra of stain films produced by anodic etching of Si in HNO3:H2O solutions have been observed and compared to those reported recently for porous Si films.
Journal ArticleDOI
Photoluminescence and formation mechanism of chemically etched silicon
TL;DR: In this paper, room temperature photoluminescence (PL) from Si chemically etched (CE) in HF•HNO3-based solution has been observed, and it was shown that the etched Si has a surface morphology similar to that of luminescent porous Si fabricated by conventional anodization.
Journal ArticleDOI
Photoluminescence studies of Mn4+ ions in YAlO3 crystals at ambient and high pressure
Ya. Zhydachevskii,D. Galanciak,S. Kobyakov,Marek Berkowski,Agata Kaminska,Andrzej Suchocki,Ya. Zakharko,Andriy Durygin +7 more
TL;DR: In this paper, the photoluminescence properties of Mn4+ (3d3) ions in YAlO3 have been performed in the temperature range 10-600 K.
Journal ArticleDOI
Luminescence of Mn4 + in the Distorted Perovskite Gd2MgTiO6
A. M. Srivastava,W. W. Beers +1 more
TL;DR: The deep red luminescence of Mn 4+ in the distorted perovskite Gd 2 MgTiO 6 is reported and discussed in this paper, where it is attributed to the deviation from a perfect 1 : 1 order between the B-site ions (Mg 2+ /Ti 4+ ) of the lattice.