Significant enhancement and broadening of excitation bands of K2SiF6:Mn4+, NH4+ phosphors induced by NH4+
Source abstract
Abstract
Abstract A series of K2SiF6: 0.06Mn4+, xNH4+ red emitting phosphors were prepared via the cation exchange method. Significant enhancement of excitation and emission bands and strongly broadening of excitation bands induced by NH4+ were observed: (a) Intensities of PLE and PL are not only enhanced obviously, but also PLE is significantly widened. (b) The relative intensity of 4A2→4T1 peak is greatly increased. (c) The sample doping with NH4+ has ZPL, while the sample without doping of NH4+ has no ZPL. Internal QY of the K2SiF6:0.06Mn4+, 0.05NH4+ is 98%. The mechanisms of the enhancement are discussed and proposed. Finally, warm white light with good luminescence efficiency (122 lm W−1), low correlated color temperature (CCT = 4146 K) and high color rendering index (Ra = 85.9 and R9 = 81) was obtained from the prototype WLEDs fabricated by using the optimal sample, indicating it has potential application for blue light-based warm WLEDs.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Advanced Photocatalysis Techniques · Luminescence and Fluorescent Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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