Synthesis and luminescence studies of Dy3+ doped Li3Sc(BO3)2 polycrystalline powder for warm white light

Dy3+‐doped Y2Zr2O7 highly transparent ceramics for ultraviolet excitable warm white light‐emitting applications

“…This phenomenon is associated with an increase in the doping concentration, causing a more serious cross‐relaxation (CR) process. Usually, the CR mechanism between Dy 3+ ions responsible for non‐radiative energy transfer are denominated as CR1, CR2, and CR3 shown in Figure 7 as follows 34,35 : $$$$\begin{equation*}{\rm{CR1}}{{\rm{:}}}^{\rm{4}}{{\rm{F}}}_{{\rm{9/2}}}{{\rm{ + }}}^{\rm{6}}{{\rm{H}}}_{{\rm{15/2}}}{ \to }^{\rm{6}}{{\rm{H}}}_{{\rm{9/2}}}{{\rm{ + }}}^{\rm{6}}{{\rm{F}}}_{{\rm{11/2}}}{{\rm{ + }}}^{\rm{6}}{{\rm{F}}}_{{\rm{3/2}}}\end{equation*}$$$$$$$$\begin{equation*}{\rm{CR2}}{{\rm{:}}}^{\rm{4}}{{\rm{F}}}_{{\rm{9/2}}}{{\rm{ + }}}^{\rm{6}}{{\rm{H}}}_{{\rm{15/2}}}{ \to }^{\rm{6}}{{\rm{F}}}_{{\rm{11/2}}}{{\rm{ + }}}^{\rm{6}}{{\rm{F}}}_{{\rm{5/2}}}\end{equation*}$$$$$$$$\begin{equation*}{\rm{CR3}}{{\rm{:}}}^{\rm{4}}{{\rm{F}}}_{{\rm{9/2}}}{{\rm{ + }}}^{\rm{6}}{{\rm{H}}}_{{\rm{15/2}}}{ \to }^{\rm{6}}{{\rm{H}}}_{{\rm{9/2}}}{{\rm{ + }}}^{\rm{6}}{{\rm{F}}}_{{\rm{11/2}}}{{\rm{ + }}}^{\rm{6}}{{\rm{F}}}_{{\rm{1/2}}}\end{equation*}$$$$…”

“…This phenomenon is associated with an increase in the doping concentration, causing a more serious cross-relaxation (CR) process. Usually, the CR mechanism between Dy 3+ ions responsible for non-radiative energy transfer are denominated as CR1, CR2, and CR3 shown in Figure 7 as follows 34,35 :…”

Dy3+ Katkılı BaB4O7 Bileşiğinin Sentezlenmesi ve Optiksel Özelliklerinin Araştırılması

“…Farklı sentez metotları ile üretilen %5Dy 3+ katkılı BaB4O7 bileşiklerinin XL spektrumu Şekil 8, farklı sentez metotları ile üretilen %5Dy 3+ katkılı BaB4O7 bileşiklerinin oda sıcaklığında 1 nm aralıklarda 200-800 nm arasında kaydedilen XL spektrumunu göstermektedir. 4f 9 -4f 9 geçişlerinden kaynaklı Dy 3+ emisyonuna ait 4 F9/2→ 6 H15/2 (463 nm), 4 F9/2→ 6 H13/2 (575 nm) ve 4 F9/2→ 6 H11/2 (683 nm) enerji geçişleri XL ışıma spektrumunda görülmektedir (Rajagukguk et al 2021, Saha et al 2021, Sahu, 2016. XL spektrumuna göre, %5Dy 3+ katkılı BaB4O7 bileşiğinde maksimum pik değeri 575 nm'de belirlendi (Kumamoto et al 2018).…”

Growth and characterization of Na3R(BO3)2 (R = La–Gd) borates: crystal structure, high-temperature behavior, and optical properties

“…12–21 One of the most significant families of such compounds are represented by alkaline borates and REE-containing alkaline borates. 22–29…”

“…[12][13][14][15][16][17][18][19][20][21] One of the most significant families of such compounds are represented by alkaline borates and REE-containing alkaline borates. [22][23][24][25][26][27][28][29] Nowadays lithium-, sodium-, and potassium-containing borates with REE ions attract increasing attention due to their low cost, low formation reaction temperature, excellent optical properties, and considerably high physicochemical stability. In addition, such borates can withstand the harsh exposure conditions of ultraviolet radiation.…”