The luminous efficiency of radiation (LER) and color rendering index (CRIs) are two key technological parameters of white light-emitting diodes (WLEDs), But there is always a trade-off between them, especially between LER and R9 (the 9th CRI of red color).Therefore, it is necessary to solve this problem by selecting suitable phosphors, mixing and c
The inspiration for this study is to use various teaching techniques in acquiring English vocabulary to avoid monotonous activities that make students bored and not interested in learning.Teachers can use miming games as a teaching technique to make the learning process in the classroom more fun and easier to understand.Miming games also allow stud
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