COLOR STABLE RED-EMITTING PHOSPHORS

• Main Authors: GARCIA FLORENCIO, MURPHY JAMES EDWARD, CHOWDHURY ASHFAQUL ISLAM, SETLUR ANANT ACHYUT, SISTA SRINIVAS PRASAD
• Format: Patent
• Language: English; Korean
• Published: 25.07.2017
• Subjects: ADHESIVES; CHEMISTRY; DYES; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES

Mn 도핑된 인광체를 합성하는 공정은, 하기 화학식 I의 전구체를, 고온에서 기체 형태의 플루오르 함유 산화제와 접촉시켜 색 안정성 Mn도핑된 인광체를 형성하는 단계를 포함한다: [화학식 I] A[MF]:Mn상기 식에서, A는 Li, Na, K, Rb, Cs, 또는 이의 조합이고; M은 Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, 또는 이의 조합이고; x는 [MF] 이온의 전하의 절대값이고; y는 5, 6 또는 7이고; Mn의 양은 총 중량을 기준으로 약 0.9 중량% 내지 약 4 중량%의 범위이다. A process for synthesizing a Mn doped phosphor includes contacting a precursor of formula I, Ax [MFy]:Mn4+ I at an elevated temperature with a fluorine-containing oxidizing agent in gaseous form to form the color stable Mn4+ doped phosphor; wherein A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is the absolute value of the charge of the [MFy] ion; y is 5, 6 or 7; and amount of Mn ranges from about 0.9 wt% to about 4 wt%, based on total weight.