Exploration of the structural and optical properties of a red-emitting phosphor K2TiF6:Mn4+<xref rid="cpb_28_1_017107fn1" ref-type="fn">*</xref><fn id="cpb_28_1_017107fn1"><label>*</label>Project supported by the National Natural Science Foundation of China (Grant No. 11574220), Fundamental Research Funds for the Central Universities, China (Grant No. SWU118055), and the Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase), China.</fn>

Exploration of the structural and optical properties of a red-emitting phosphor K₂TiF₆:Mn⁴⁺**

Project supported by the National Natural Science Foundation of China (Grant No. 11574220), Fundamental Research Funds for the Central Universities, China (Grant No. SWU118055), and the Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase), China.

Dou Xi-Long¹, Kuang Xiao-Yu^{1, †}, Xia Xin-Xin¹, Ju Meng^{2, ‡}

(a) Energy level splitting of d³ configuration in octahedron field. (b) Atomic orbital angle distribution diagram of d. (c) Tanabe–Sugano diagram for the d³ electron configuration in the octahedral crystal field. (d) Configurational coordinate diagram for Mn⁴⁺ in K₂TiF₆.