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Aleksandrovskii, A. S.; Безматерных, Л. Н.; Гудим, И. А.; Крылов, А. С.; Temerov, V. L.

doi:10.1023/a:1020581406023

Cited by 9 publications

(4 citation statements)

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“…Disappearance of orange emission was previously observed in Mn 3+ -doped garnets, but it was accompanied by the appearance of dark red emission from another level with larger lifetime. 28,29 The decrease in I PL of the deep red emission at T ≥ 100 K (Fig. 10) is thought to be due to the thermionic emission of the excited electrons in the Mn 4+ center to its ground state ( 6 A 1g ) or to any trap levels formed within the forbidden gap in h-K 2 MnF 6 .…”

Section: Discussionmentioning

confidence: 99%

Red and Deep Red Emissions from Cubic K₂SiF₆:Mn⁴⁺and Hexagonal K₂MnF₆Synthesized in HF/KMnO₄/KHF₂/Si Solutions

Kasa

Adachi

2012

J. Electrochem. Soc.

113

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Cubic K 2 SiF 6 :Mn 4+ and hexagonal (h-) K 2 MnF 6 red phosphors are synthesized in HF/KMnO 4 /KHF 2 /Si solutions under KMnO 4rich and KHF 2 -rich conditions, respectively. K 2 SiF 6 :Mn 4+ exhibits efficient red photoluminescence (PL) emission at ∼630 nm. h-K 2 MnF 6 also exhibits red emission at ∼630 nm and deep red emission at ∼680 nm; however, the deep red emission undergoes considerable thermal quenching above 100 K. These two emission bands observed in h-K 2 MnF 6 have the same PL excitation bands as those in K 2 SiF 6 :Mn 4+ . The red emissions can be assigned to the 2 E g → 4 A 2g transition of the 3d 3 electrons in the MnF 2− 6 octahedra of h-K 2 MnF 6 and K 2 SiF 6 . The deep red emission in h-K 2 MnF 6 is considered to arise from a strongly distorted Mn 4+ center in its hexagonal lattice. PL properties, such as the temperature dependence of the PL intensity and luminescence lifetime, of h-K 2 MnF 6 are presented in details in comparison with those of K 2 SiF 6 :Mn 4+ . The addition of KHF 2 is also found to be not so efficient to control the Mn doping level in K 2 SiF 6 :Mn 4+ .

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Section: Discussionmentioning

confidence: 99%

Red and Deep Red Emissions from Cubic K₂SiF₆:Mn⁴⁺and Hexagonal K₂MnF₆Synthesized in HF/KMnO₄/KHF₂/Si Solutions

Kasa

Adachi

2012

J. Electrochem. Soc.

113

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“…The most common oxidation states of Mn are +2,+3,+4,+6, and +7, though oxidation states from À3 to +7 have been observed. Mn 2+ and Mn 4+ ions are the most efficient activators in various phosphor materials, but the Mn 3+ ion is not an efficient activator in any host, with the exception of garnets [50,51]. The ESR spectrum of manganese ions can be readily identified because of the six hyperfine lines characteristic of the Mn nuclear spin I = 5/2.…”

Section: Possible Photo-induced Degradation Mechanismmentioning

confidence: 99%

Photo-induced degradation and thermal decomposition in ZnSnF6·6H2O:Mn4+ red-emitting phosphor

Hoshino

Adachi

2015

Optical Materials

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“…21 In addition, the Mn 3+ ion is not an efficient activator in most host insulators. 22 K 2 MnF 6 can be synthesised by a simple chemical reaction as follows:…”

Section: Resultsmentioning

confidence: 99%

Large micro-sized K₂TiF₆:Mn⁴⁺red phosphors synthesised by a simple reduction reaction for high colour-rendering white light-emitting diodes

et al. 2015

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Cited by 9 publications

References 3 publications

Red and Deep Red Emissions from Cubic K₂SiF₆:Mn⁴⁺and Hexagonal K₂MnF₆Synthesized in HF/KMnO₄/KHF₂/Si Solutions

Red and Deep Red Emissions from Cubic K₂SiF₆:Mn⁴⁺and Hexagonal K₂MnF₆Synthesized in HF/KMnO₄/KHF₂/Si Solutions

Photo-induced degradation and thermal decomposition in ZnSnF6·6H2O:Mn4+ red-emitting phosphor

Large micro-sized K₂TiF₆:Mn⁴⁺red phosphors synthesised by a simple reduction reaction for high colour-rendering white light-emitting diodes

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Untitled

Cited by 9 publications

References 3 publications

Red and Deep Red Emissions from Cubic K2SiF6:Mn4+and Hexagonal K2MnF6Synthesized in HF/KMnO4/KHF2/Si Solutions

Red and Deep Red Emissions from Cubic K2SiF6:Mn4+and Hexagonal K2MnF6Synthesized in HF/KMnO4/KHF2/Si Solutions

Photo-induced degradation and thermal decomposition in ZnSnF6·6H2O:Mn4+ red-emitting phosphor

Large micro-sized K2TiF6:Mn4+red phosphors synthesised by a simple reduction reaction for high colour-rendering white light-emitting diodes

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Red and Deep Red Emissions from Cubic K₂SiF₆:Mn⁴⁺and Hexagonal K₂MnF₆Synthesized in HF/KMnO₄/KHF₂/Si Solutions

Red and Deep Red Emissions from Cubic K₂SiF₆:Mn⁴⁺and Hexagonal K₂MnF₆Synthesized in HF/KMnO₄/KHF₂/Si Solutions

Large micro-sized K₂TiF₆:Mn⁴⁺red phosphors synthesised by a simple reduction reaction for high colour-rendering white light-emitting diodes