Improving Upconversion Photoluminescence of GdAlO<sub>3</sub>:Er<sup>3+</sup>, Yb<sup>3+</sup> Phosphors via Ga<sup>3+</sup>, Lu<sup>3+</sup> Doping

<p>FT-IR spectra of (<span class="nowrap"><svg height="14.724pt" id="M58" style="vertical-align:-5.48785pt" version="1.1" viewbox="-0.0498162 -9.23615 58.7712 14.724" width="58.7712pt" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M692 302H438V274C537 267 543 260 543 188V103C543 61 531 48 511 37C489 26 458 20 424 20C231 20 146 188 146 333C146 517 258 630 411 630C507 630 582 597 606 474L634 480C627 546 622 601 619 636C586 643 510 665 426 665C230 665 44 552 44 321C44 122 191 -15 411 -15C491 -15 573 7 635 21C629 49 628 81 628 116V202C628 261 632 266 692 274V302Z"></path></g><g transform="matrix(.013,0,0,-0.013,9.399,0)"><path d="M517 51L485 54C448 58 441 63 441 115V712C404 700 337 684 285 678V653C357 648 362 645 362 580V437C339 446 309 449 295 449C159 449 38 340 38 201C38 61 143 -12 223 -12C234 -12 261 -6 301 17L362 53V-12C420 9 495 22 517 26V51ZM362 85C338 67 301 51 266 51C201 51 128 109 128 228C128 373 212 411 259 411C296 411 338 395 362 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International Journal of Optics

fig8

Figure 8

Figure 8: Improving Upconversion Photoluminescence of GdAlO<sub>3</sub>:Er<sup>3+</sup>, Yb<sup>3+</sup> Phosphors via Ga<sup>3+</sup>, Lu<sup>3+</sup> Doping 

International Journal of Optics

Improving Upconversion Photoluminescence of GdAlO3:Er3+, Yb3+ Phosphors via Ga3+, Lu3+ Doping

Figure 8

Improving Upconversion Photoluminescence of GdAlO₃:Er³⁺, Yb³⁺ Phosphors via Ga³⁺, Lu³⁺ Doping