Radiative and non-radiative decay rate of K2SiF6:Mn4+ phosphors

• Main Authors: Kim, Minseuk, Park, Woon Bae, Bang, Bokeuk, Kim, Chang Hae, Sohn, Kee-Sun
• Format: Journal Article
• Language: English; Japanese
• Published: 01.01.2015
• ISSN: 2050-7526; 2050-7534
• DOI: 10.1039/c5tc00757g

Mn 4+ -activated K 2 SiF 6 phosphors for use in light emitting diode (LED) applications have recently attracted a great deal of attention since they exhibit an advantage over conventional wide band-type red-light-emitting phosphors. K 2 SiF 6 :Mn 4+ phosphors have shown extremely narrow emission peaks in wavelengths ranging from 620 to 630 nm, leading to a higher color-rendering index and larger color gamut for the final LED applications. We examined the decay behavior in terms of radiative and non-radiative rates along with a reliable evaluation of Mn 4+ concentrations. Inter-activator energy transfer played a significant role in the luminescence process in this well-known narrow peak emission type of the red phosphor K 2 SiF 6 :Mn 4+ . Mn 4+ -activated K 2 SiF 6 phosphors for use in light emitting diode (LED) applications have recently attracted a great deal of attention since they exhibit an advantage over conventional wide band-type red-light-emitting phosphors.