Achieving tunable emitting YAl3(BO3)4:Eu phosphors by substituting cations (Sr2+, Ca2+, Ga3+, In3+) and controlling BO3 group polarizability,CrystEngComm

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Achieving tunable emitting YAl3(BO3)4:Eu phosphors by substituting cations (Sr2+, Ca2+, Ga3+, In3+) and controlling BO3 group polarizability
CrystEngComm ( IF 2.6 ) Pub Date : 2020-07-01 , DOI: 10.1039/d0ce00505c
Jinjin Liu _{1,

2,

3,

4,

5} , Zhijun Wang _{1,

2,

3,

4,

5} , Xue Li _{1,

2,

3,

4,

5} , Xiangyu Meng _{1,

2,

3,

4,

5} , Keliang Qiu _{1,

2,

3,

4,

5} , Dawei Wang _{6,

7,

8} , Jinxin Zhao _{6,

7,

8} , Weidong Lai _{1,

2,

3,

4,

5} , Zhiping Yang _{1,

2,

3,

4,

5} , Panlai Li _{1,

2,

3,

4,

5}

Affiliation

In order to explore the influence factor on the luminescence characteristics and valence state of Eu ions, a series of YAl₃(BO₃)_4−m(PO₄)_m:0.05Eu, Y_0.925−xAC_xL_xBO:0.05Eu, Y_0.925−yAS_yL_yBO:0.05Eu, Y_0.925−zAG_zBO:0.05Eu and Y_0.925−wAI_wBO:0.05Eu phosphors are synthesized in a CO atmosphere. It is found that the content ratio of Eu²⁺ to Eu³⁺ ions is closely related to the crystal volume. The larger the volume, the larger the polarizability of BO₃ anionic groups, and the larger the content ratio of Eu²⁺ to Eu³⁺ ions. When Y³⁺ cations in YAl₃(BO₃)₄ are replaced by Sr²⁺ or Ca²⁺ ions with a larger radius, the ratio of Eu²⁺ to Eu³⁺ ions increases, and the maximum ratio is 0.798. When Ga³⁺ ions with a radius smaller than that of Y³⁺ ions but larger than that of Al³⁺ ions are doped, Al³⁺ ions are preferentially replaced by Ga³⁺ ions, resulting in the increase of crystal volume, and the ratio of Eu²⁺ ions to Eu³⁺ ions increases from 0.159 to 0.359. When In³⁺ ions with a radius smaller than that of Y³⁺ ions but larger than that of Al³⁺ ions are added, the crystal volume decreases with increasing In³⁺ concentration, and the proportion of Eu²⁺ to Eu³⁺ ions decreases accordingly; moreover, new luminescence centers are observed, which come from oxygen vacancy defects. In short, the results indicate that the luminescence properties, especially the content ratio of Eu²⁺ to Eu³⁺, can be adjusted by regulating the matrix components, and this should be used to adjust the white emission or red–blue ratio.

中文翻译：

通过取代阳离子（Sr2 +，Ca2 +，Ga3 +，In3 +）并控制BO3基团极化率来获得可调发射YAl3（BO3）4：Eu荧光粉

为了探索影响Eu离子发光特性和价态的因素，一系列YAl ₃（BO ₃）_{4− m}（PO ₄）_m：0.05Eu，Y _{0.925− x} AC _x L _x BO：0.05 Eu，Y _{0.925- y} AS _y L _y BO：0.05Eu，Y _{0.925- z} AG _z BO：0.05Eu和Y _{0.925- w} AI _w BO：0.05Eu荧光粉是在CO气氛中合成的。发现Eu ²⁺与Eu ³⁺的含量比离子与晶体体积密切相关。体积越大，BO ₃阴离子基团的极化率越大，并且Eu ²⁺与Eu ³⁺离子的含量比越大。当用较大半径的Sr ²⁺或Ca ²⁺离子代替YAl ₃（BO ₃）₄中的Y ³⁺阳离子时，Eu ²⁺与Eu ³⁺离子的比率增加，最大比率为0.798。当掺杂半径小于Y ³⁺离子但大于Al ³⁺离子的Ga ³⁺离子时，Al ³⁺离子优先被Ga ³⁺离子替代，导致晶体体积增加，并且Eu ²⁺离子与Eu ³⁺离子的比率从0.159增加到0.359。当在³⁺离子与比是Y的较小的半径³⁺离子，但比Al大³⁺离子加入时，晶体体积随在减小³⁺浓度，和Eu的比例²⁺与Eu ³⁺离子相应减少；此外，观察到新的发光中心，这是由于氧空位缺陷引起的。简而言之，结果表明发光性质，特别是Eu ²⁺的含量比可以通过调节基体成分来调节Eu ^3+的浓度，这应用于调节白色发射或红色-蓝色比率。

更新日期：2020-08-17

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