Facile Synthesis of Yb<sup>3+</sup>- and Er<sup>3+</sup>-Codoped LiGdF<sub>4</sub> Colloidal Nanocrystals with High-Quality Upconversion Luminescence

<div>(a–d) TEM images of LiGdF<sub>4</sub>:Yb<sup>3+</sup>/Er<sup>3+</sup> nanocrystals, which are synthesized at <span class="nowrap"><svg height="14.0161pt" id="M22" style="vertical-align:-2.150599pt" version="1.1" viewbox="-0.0498162 -11.8655 70.0057 14.0161" width="70.0057pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M495 163C480 117 462 85 444 65C421 39 387 34 332 34C290 34 256 36 236 47C218 57 213 77 213 131V526C213 612 222 616 301 622V650H40V622C122 616 128 611 128 526V126C128 41 120 34 36 28V0H489C498 31 519 126 525 157L495 163Z"></path></g><g transform="matrix(.013,0,0,-0.013,7.02,0)"><path d="M135 536C164 536 186 560 186 587C186 617 164 639 136 639C109 639 85 617 85 587C85 560 109 536 135 536ZM252 0V26C188 32 181 38 181 106V451C138 433 90 420 39 412V388C99 379 102 374 102 312V106C102 38 95 32 32 26V0H252Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,10.517,-5.741)"><path d="M556 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553 583C562 560 566 531 565 493L597 494C603 551 612 629 620 675Z"></path></g><g transform="matrix(.013,0,0,-0.013,11.917,0)"><path d="M535 323V373H52V323H535ZM535 138V188H52V138H535Z"></path></g><g transform="matrix(.013,0,0,-0.013,23.18,0)"><path d="M285 378C315 398 338 416 353 432C373 451 384 474 384 503C384 579 325 635 236 635H235C182 635 136 610 108 579L65 516L85 496C110 533 150 575 205 575C258 575 300 543 300 481C300 407 232 369 141 339L147 310C163 315 188 321 211 321C268 321 338 284 338 192C338 94 288 40 217 40C160 40 119 68 93 91C85 98 77 97 69 91C60 84 47 71 46 58C44 46 48 35 62 22C75 10 116 -12 162 -12C234 -12 424 62 424 224C424 297 373 359 285 376V378Z"></path></g><g transform="matrix(.013,0,0,-0.013,29.42,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z"></path></g><g transform="matrix(.013,0,0,-0.013,35.66,0)"><path d="M241 635C89 635 35 457 35 312C35 153 89 -12 240 -12C390 -12 443 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Journal of Nanomaterials

fig4

Figure 4

Figure 4: Facile Synthesis of Yb<sup>3+</sup>- and Er<sup>3+</sup>-Codoped LiGdF<sub>4</sub> Colloidal Nanocrystals with High-Quality Upconversion Luminescence 

Journal of Nanomaterials

Facile Synthesis of Yb3+- and Er3+-Codoped LiGdF4 Colloidal Nanocrystals with High-Quality Upconversion Luminescence

Figure 4

Facile Synthesis of Yb³⁺- and Er³⁺-Codoped LiGdF₄ Colloidal Nanocrystals with High-Quality Upconversion Luminescence