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Tuning the Langasite, La3SbZn3Si2O14, towards white light emission: synthesis, structure, SHG and photoluminescence studies
Dalton Transactions ( IF 3.5 ) Pub Date : 2020-11-18 , DOI: 10.1039/d0dt03450a
Anupam Bhim 1, 2, 3, 4, 5 , Ashutosh Mohanty 1, 2, 3, 4, 5 , Srinivasan Natarajan 1, 2, 3, 4, 5
Affiliation  

A series of single-phase color-tunable Langasite, La3SbZn3Si2O14:RE3+ (RE = Eu, Tb, and Tm) phosphors have been prepared and characterized employing X-ray diffraction (XRD), Raman, and photoluminescence (PL) studies. The substituted compounds, La3SbZn3Si2O14:Eu3+, La3SbZn3Si2O14:Tb3+ and La3SbZn3Si2O14:Tm3+ exhibit the characteristic emissions of Eu3+ (red), Tb3+ (green) and Tm3+ (blue), respectively. By carefully adjusting the concentration of Eu3+ ions in the La3SbZn3Si2O14:1% Tm3+, 2% Tb3+, x% Eu3+ system, we achieved a white emission with a reasonable quantum yield. The compounds are found to be SHG (second-harmonic generation) active with the highest values of 3.6 × KDP (potassium dihydrogen phosphate). In addition, the compounds exhibit reasonable dielectric constants with low loss. The present study demonstrates the color tunability of the Langasite family of compounds and establishes it as an adaptable structure.

中文翻译:

将兰格石La3SbZn3Si2O14调整为白色发光:合成,结构,SHG和光致发光研究

已经制备了一系列单相可调谐的镧铁矿La 3 SbZn 3 Si 2 O 14:RE 3+(RE = Eu,Tb和Tm)荧光粉,并使用X射线衍射(XRD),拉曼光谱仪进行了表征。和光致发光(PL)研究。取代的化合物La 3 SbZn 3 Si 2 O 14:Eu 3+,La 3 SbZn 3 Si 2 O 14:Tb 3+和La 3 SbZn 3 Si 2 O 14:Tm 3+分别表现出Eu 3+(红色),Tb 3+(绿色)和Tm 3+(蓝色)的特征发射。通过仔细调节La 3 SbZn 3 Si 2 O 14中Eu 3+离子的浓度:1%Tm 3+,2%Tb 3+x%Eu 3+系统,我们以合理的量子产率实现了白色发射。发现这些化合物具有SHG(二次谐波生成)活性,最高值为3.6×KDP(磷酸二氢钾)。此外,这些化合物显示出合理的介电常数,且损耗低。本研究证明了Langasite系列化合物的颜色可调性,并将其确立为适应性结构。
更新日期:2020-11-25
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