Surface modification of K2TiF6:Mn4+ phosphor with SrF2 coating has been introduced, with the aid of KHF2 transition layer to moderate the lattice mismatch. The reaction mechanism is discussed in detail, as so as the influence of SrF2 coating on the luminescence intensity. The SrF2 coating is ...
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X. Optimized Photoluminescence of Red Phosphor K2TiF6:Mn4+ Synthesized At Room Temperature and Its Formation Mechanism. J. Mater. Chem. C 2015, 3, 1935-1941.Lv, L.; Chen, Z.; Liu, G.; Huang, S.; Pan, Y. Optimized photoluminescence of red phosphor K2TiF6: Mn4+ synthesized at ...
Large micro-sized K2TiF6:Mn4+red phosphors synthesised by a simple reduction reaction for high colour-rendering white light-emitting diodes. Han T,Lang T,Wang J,et al. RSC Adv . 2015Han, T.; Lang, T.; Wang, J.; Tu, M.; Peng, L., Large Micro-Sized K2TiF6:Mn4+ Red Phosphors...
K2TiF6:Mn4+W-LEDsReaction mechanismIn this work, an airtight solid-state strategy was developed for the synthesis of K2TiF6:Mn4+ phosphor without the usage of high concentration HF solution. By heating K2TiF6, K2MnF6 and KHF2 in a sealed container at 474 K for hours and then washing ...
High efficient red phosphor K2TiF6:Mn4+was successfully prepared though a modified two-step co-precipitation method under room temperature. Pure phase of the K2TiF6powder, with various doping concentration of Mn4+range from 4 at.% to 9 at.%, was determined by the X-ray diffraction (XRD)...
A series of K2TiF6:Mn4+, M2+ samples were prepared by the cation exchange method. Experimental results indicate that Mn4+ and Ti4+ can be quantitatively exchanged. Doped effects of M2+ (M = Mg, Ca, Sr, Ba, and Zn) on the fluorescent properties of the samples were discussed. The ...
The sample of K2TiF6:0.0253Mn4+ contains perfect hexagonal phase micro-sticks with sizes about 0.5 × 0.5 × 3.0 μm, which its decay lifetime and the photoluminescence quantum yields are 5.2 ms and 94.04%, respectively. The chromaticity coordinates of K2TiF6:0.0253Mn4+ ...
In current work, ared-emitting phosphor K2TiF6:Mn4+ was prepared by a facile method using H2O to replace high toxic HF as solvent at room temperature. Its structure and morphology were characterized by the XRD and SEM measurement. The obtained K2Ti0.96F6:0.04Mn4+ presents intense excitation...
In this study, we propose integrated surface modification processes to enhance the performance and stability of the luminescence properties of K2TiF6:Mn4+ (KTF) phosphor. These integrated process are applied in the initial synthesis step, coating of the as-synthesized powder post-treatment process,...