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This study focuses on the fabrication of red-emitting phosphor based on K2SiF6: Mn 4+ phosphor. Characteristic emissive peaks in the red region of the Mn 4+ ions involve the energy transfer from spin-forbidden states of 2 Eg → 4 A2, showing narrow band emission peaks at 609, 614, 631, 635 and 647 nm. Meanwhile, their absorptive peaks involve the energy transfer from spin-allowed states of 4 A2 → 4 Tg; the excited wavelength of the Mn 4+ is in the range 360 460 nm. Thus, the K2SiF6: Mn 4+ phosphor is particularly suitable for redundancy of 460 nm Light Emitting Diode (LED); it complements the red emission of the commercial White LEDs.

A STUDY OF RED-EMITTING PHOSPHOR OF K2SiF6:Mn4+ FOR WARM WHITE LEDs