Mn4+ 이온 활성 K2TiF6 불화물 적색형광체의 합성과 발광특성

김연; 우미혜; 최성호; 심광보; 정하균; Yeon Kim; Mihye Wu; Sungho Choi; Kwang Bo Shim; Ha-Kyun Jung

Korean Journal of Materials Research, Vol.26, No.9, 504-511, September, 2016

DOI10.3740/MRSK.2016.26.9.504 Export Citation

Mn4+ 이온 활성 K2TiF6 불화물 적색형광체의 합성과 발광특성

Synthesis of K2TiF6:Mn4+ Red Phosphors by a Simple Method and Their Photoluminescence Properties

김연^{1, 2}, 우미혜¹, 최성호¹, 심광보², 정하균^{1, 3, †}

¹한국화학연구원 차세대전지소재연구센터
²한양대학교 신소재공학과
³한국과학기술대학교대학원 화학융합소재학과

Yeon Kim^{1, 2}, Mihye Wu^{1, 3}, Sungho Choi^{1, 3}, Kwang Bo Shim², and Ha-Kyun Jung^{1, 4, †}

¹Advanced Materials Division, Korea Research Institute of Chemical Technology, 141 Gajeongro, Yuseong, Daejeon 34114, Korea
²Division of Materials Science and Engineering, Hanyang University, Seoul 04763, Korea
³, Korea
⁴Department of Chemical Convergence Materials, Korea University of Science and Technology (UST), 217 Gajeongro, Yuseong, Daejeon 34113, Korea

E-mail:

To prepare Mn4+-activated K2TiF6 phosphor, a precipitation method without using hydrofluoric acid (HF) was designed. In the synthetic reaction, to prevent the decomposition of K2MnF6, which is used as a source of Mn4+ activator, NH5F2 solution was adopted in place of the HF solution. Single phase K2TiF6:Mn4+ phosphors were successfully synthesized through the designed reaction at room temperature. To acquire high luminance of the phosphor, the reaction conditions such as the type and concentration of the reactants were optimized. Also, the optimum content of Mn4+ activator was evaluator based on the emission intensity. Photoluminescence properties such as excitation and emission spectrum, decay curve, and temperature dependence of PL intensity were investigated. In order to examine the applicability of this material to a white LED, the electroluminescence property of a pc-WLED fabricated by combining the K2TiF6:Mn4+ phosphor with a 450 nm blue-LED chip was measured.

Keywords:luminescence;red phosphor;K2TiF6:Mn4+

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