An organic–inorganic hybrid K2TiF6 : Mn4+ red-emitting phosphor with remarkable improvement of emission and luminescent thermal stability. Issue 7 (28th January 2022)

• Record Type: Journal Article
• Authors: Yu, Yan; Wang, Lin; Deng, Daishu; Zhong, Xue; Qiang, Jiawei; Wang, Tianman; Wu, Chunxiang; Liao, Sen; Huang, Yingheng
• Is Part Of: RSC advances. Volume 12:Issue 7(2022)
• Page Start: 3788
• Page End: 3795
• Publication Date: 2022-01-28
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra08734g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : KTF : MEAH +, Mn 4+ exhibits good luminescent thermal stability at high temperatures, and the maximum integrated PL intensity at 150 °C is 2.34 times the initial value at 30 °C. Abstract : A new type of monoethanolamine (MEA) and Mn 4+ co-doped KTF : MEAH +, Mn 4+ (K2 TiF6 : 0.1MEAH +, 0.06Mn 4+ ) red emitting phosphor was synthesized by an ion exchange method. The prepared Mn 4+ co-doped organic–inorganic hybrid red phosphor exhibits sharp red emission at 632 nm and the emission intensity at room temperature is 1.43 times that of a non-hybrid control sample KTF : Mn 4+ (K2 TiF6 : 0.06Mn 4+ ). It exhibits good luminescent thermal stability at high temperatures, and the maximum integrated PL intensity at 150 °C is 2.34 times that of the initial value at 30 °C. By coating a mixture of KTF : MEAH +, Mn 4+, a yellow phosphor (YAG : Ce 3+ ) and epoxy resin on a blue InGaN chip, a prototype WLED (white light-emitting diode) with CCT = 3740 K and R a = 90.7 is assembled. The good performance of the WLED shows that KTF : MEAH +, Mn 4+ can provide a new choice for the synthesis of new Mn 4+ doped fluoride phosphors.