Ion exchange-assisted surface passivation toward highly stable red-emitting fluoride phosphors for light-emitting diodes

Abstract A facile and environmentally friendly ion exchange-assisted surface passivation (IASP) strategy is presented for synthesizing red emitting Mn4+-activated fluoride phosphors.A substantial, pristine Mn4+-free shell layer, applied as a coating to Mn4+ doped potassium fluorosilicate K2SiF6:Mn4+ (KSFM) phosphors, enhances both water resistance

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A STUDY OF INTONATION PATTERNS IN KHASI: LABELING AND ANALYSIS

This paper aims to analyze the intonation patterns found in Khasi, an Austroasiatic language spoken in north-eastern India.The study focuses on the use of pitch and how it correlates with meaning.The main objective of this paper is to use a Rhythm and orly impressions Pitch labeling (RaP) system to annotate the data collected from native speakers o

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