Dynamics of the Green and Red Upconversion Emissions in <svg style="vertical-align:-0.21599pt;width:43.087502px;" id="M1" height="21.112499" version="1.1" viewBox="0 0 43.087502 21.112499" width="43.087502" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(.022,-0,0,-.022,.062,20.788)"><path id="x59" d="M620 650v-28q-51 -6 -70.5 -19t-48.5 -60q-68 -110 -126 -219q-17 -32 -17 -63v-136q0 -63 15.5 -77.5t84.5 -19.5v-28h-282v28q67 5 82 19.5t15 77.5v133q0 22 -21 60l-126 219q-31 53 -49 67t-62 18v28h239v-28q-51 -6 -59.5 -18t8.5 -36q13 -25 135 -237
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q0 -65 24 -81q19 -13 104 -13q57 0 83 7t43 27q28 33 50 94z" /></g><g transform="matrix(.022,-0,0,-.022,12.795,20.788)"><path id="x72" d="M181 342h2q63 107 121 107q24 0 41 -16t17 -34q0 -34 -32 -49q-17 -7 -26 2q-21 20 -43 20q-20 0 -42 -22t-38 -63v-183q0 -50 12.5 -62t69.5 -16v-26h-230v26q47 5 58 17t11 61v207q0 49 -9 60.5t-53 16.5v23q74 12 141 40v-109z" /></g><g transform="matrix(.016,-0,0,-.016,21.112,10.025)"><use xlink:href="#x33" /></g><g transform="matrix(.016,-0,0,-.016,28.644,10.025)"><use xlink:href="#x2B" /></g></svg>-Codoped <svg style="vertical-align:-4.47125pt;width:47.387501px;" id="M3" height="20.6" version="1.1" viewBox="0 0 47.387501 20.6" width="47.387501" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(.022,-0,0,-.022,.062,14.975)"><use xlink:href="#x59" /></g><g transform="matrix(.016,-0,0,-.016,14.275,20.35)"><path id="x32" d="M412 140l28 -9q0 -2 -35 -131h-373v23q112 112 161 170q59 70 92 127t33 115q0 63 -31 98t-86 35q-75 0 -137 -93l-22 20l57 81q55 59 135 59q69 0 118.5 -46.5t49.5 -122.5q0 -62 -29.5 -114t-102.5 -130l-141 -149h186q42 0 58.5 10.5t38.5 56.5z" /></g><g transform="matrix(.022,-0,0,-.022,22.425,14.975)"><path id="x4F" d="M381 665q131 0 226.5 -93t95.5 -239q0 -158 -96 -253t-238 -95q-137 0 -231 95t-94 238q0 142 92.5 244.5t244.5 102.5zM359 629q-89 0 -151 -74.5t-62 -208.5q0 -141 69 -233t175 -92q90 0 150.5 74t60.5 211q0 152 -69 237.5t-173 85.5z" /></g><g transform="matrix(.016,-0,0,-.016,39.175,20.35)"><use xlink:href="#x33" /></g></svg> Nanorods

<table>Experimental and simulated fluorescence decays of the (a) green ((<sup>2</sup>H<sub>11/2</sub>, <sup>4</sup>S<sub>3/2</sub><svg height="13.45" id="M69" style="vertical-align:-2.21957pt" version="1.1" viewbox="0 0 29.35 13.45" width="29.35" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,13.45)">
<g transform="translate(72,-61.24)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">)</tspan>
<tspan style="font-size: 12.50px; " x="9.7148314" y="0">→</tspan>
</text>
</g>
</g>
</svg><sup>4</sup>I<sub>15/2</sub>), (b) red (<sup>4</sup>F<sub>9/2</sub>→<sup>4</sup>I<sub>15/2</sub>), and (c) NIR (<sup> 4</sup>I<sub>13/2</sub>→<sup>4</sup>I<sub>15/2</sub>)  Er<sup>3+</sup> emissions, and (d) NIR (<sup>4</sup>F<sub>5/2</sub>→<sup>4</sup>F<sub>7/2</sub>) Yb<sup>3+</sup> emission.</table>

Journal of Nanomaterials

fig6

Figure 6

Figure 6: Dynamics of the Green and Red Upconversion Emissions in <svg style="vertical-align:-0.21599pt;width:43.087502px;" id="M1" height="21.112499" version="1.1" viewBox="0 0 43.087502 21.112499" width="43.087502" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(.022,-0,0,-.022,.062,20.788)"><path id="x59" d="M620 650v-28q-51 -6 -70.5 -19t-48.5 -60q-68 -110 -126 -219q-17 -32 -17 -63v-136q0 -63 15.5 -77.5t84.5 -19.5v-28h-282v28q67 5 82 19.5t15 77.5v133q0 22 -21 60l-126 219q-31 53 -49 67t-62 18v28h239v-28q-51 -6 -59.5 -18t8.5 -36q13 -25 135 -237
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q-44 0 -78 -19z" /></g><g transform="matrix(.016,-0,0,-.016,25.662,10.025)"><path id="x33" d="M285 378v-2q65 -13 102 -54.5t37 -97.5q0 -57 -30.5 -104.5t-74 -75t-85.5 -42t-72 -14.5q-31 0 -59.5 11t-40.5 23q-19 18 -16 36q1 16 23 33q13 10 24 0q58 -51 124 -51q55 0 88 40t33 112q0 64 -39 96.5t-88 32.5q-29 0 -64 -11l-6 29q77 25 118 57.5t41 84.5
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Journal of Nanomaterials

Dynamics of the Green and Red Upconversion Emissions in --Codoped Nanorods

Figure 6