مرکز منطقه ای اطلاع رساني علوم و فناوري - Cooperative Down-Conversion Luminescence in <formula formulatype="inline"> <img src="/images/tex/21382.gif" alt=" \\hbox {Tb}^{3+}/ \\hbox {Yb}^{3+}"> </formula> Co-Doped <formula formulatype="inline"> <img src="/images/tex/21383.gif" alt="\\hbox {LiYF}

Title :

Cooperative Down-Conversion Luminescence in $\\hbox {Tb}^{3+}/ \\hbox {Yb}^{3+}$ Co-Doped $\\hbox {LiYF}_{</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Author : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Li Fu ; Haiping Xia ; Yanmin Dong ; Shanshan Li ; Haochuan Jiang ; Baojiu Chen</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Author_Institution : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Key Lab. of Photo-Electron. Mater., Ningbo Univ., Ningbo, China</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Volume : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>6</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Issue : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>1</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fYear : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>2014</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fDate : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Feb. 2014</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Firstpage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>1</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Lastpage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>9</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Abstract : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Cooperative down-conversion (DC) with emission of two near-infrared photons for each blue photon absorbed was achieved in Tb<sup>3+</sup>/Yb<sup>3+</sup> co-doped yttrium lithium fluoride single crystals grown by an improved Bridgman method. The luminescent properties of the crystals were investigated through photoluminescence excitation, emission spectra, and decay curves. With the excitation of Tb<sup>3+</sup> ion by a 486 nm light, emission between 980 and 1030 nm from the Yb<sup>3+</sup>:<sup>2</sup>F<sub>5/2</sub> → <sup>2</sup>F<sub>7/2</sub> transition was observed, and this emission originated from the DC between Tb<sup>3+</sup> and Yb<sup>3+</sup> ions. The energy transfer processes are studied based on the Inokuti-Hirayama´s model, and the interaction between Tb<sup>3+</sup> and Yb<sup>3+</sup> is confirmed to be electric dipole-dipole. The large quantum cutting efficiency approaches up to 166.7% for 0.32 mol% of Tb<sup>3+</sup> and 7.98 mol% of Yb<sup>3+</sup> co-doped LiYF<sub>4</sub>, which is potentially used as a DC layer in silicon-based solar cells.</div> </div> <div class='row'> <div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>crystal growth; lithium compounds; luminescence; photoluminescence; photonic crystals; photons; quantum optics; terbium; ytterbium; Bridgman method; DC layer; Inokuti-Hirayama model; LiYF4 single crystals; LiYF<sub>4</sub>:Tb<sup>3+</sup>,Yb<sup>3+</sup>; cooperative down-conversion luminescence; crystal growth; decay curves; electric dipole-dipole; emission spectra; energy transfer processes; luminescent properties; near-infrared photons; photoluminescence excitation; quantum cutting efficiency; silicon-based solar cells; wavelength 1030 nm; wavelength 486 nm; wavelength 980 nm; yttrium lithium fluoride single crystals; Absorption; Crystals; Ions; Licenses; Photonics; Photovoltaic cells; <formula formulatype=$ $hbox{LiYF}_{4}$ single crystal; $hbox{Tb}^{3+}$; $hbox{Yb}^{3+}$; I-H model; down-conversion; energy transfer;