Broadband UV Excited LaF3:Eu3+ Based Inorganic-Organic Mixed Hybrid Nanoparticles for Strong Luminescence
Broadband UV Excited LaF3:Eu3+ Based Inorganic-Organic Mixed Hybrid Nanoparticles for Strong Luminescence
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宽带紫外激发 LaF3:Eu3 基无机-有机混合杂化纳米颗粒的强发光
DOI：
10.1166/jnn.2018.14214
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发表时间：
2018
影响因子：
--
通讯作者：
Zhang Aisheng
中科院分区：
文献类型：
--
作者：
Wang Xiaojing;Yang Yi;Du Guoping;Chen Nan;Zhang Aisheng
稀土离子掺杂的纳米粒子可以与有机配体配位形成无机-有机杂化纳米粒子，由于有机配体向稀土离子的能量转移，使得纳米粒子的发光强度大大增强。然而，当与单一类型的有机配体配位时，它们的发光激发光谱带宽仍然相当有限。本工作采用水热法合成了Eu 3+掺杂的LaF 3（LaF 3：Eu 3+）纳米粒子作为无机材料的模型。LaF 3：Eu 3+纳米粒子与苯甲酸和2-噻吩甲酰三氟丙酮同时配位，形成无机-有机混合杂化纳米粒子，而不是与单一类型的有机配体配位。混合的杂化纳米粒子具有宽带激发光谱（200~400 nm），完美地覆盖了整个紫外（UV）光谱范围的太阳辐射。通过将紫外光下转换为可见光，它们的宽带紫外激发光谱将极其有利于硅太阳能电池转换效率的提高。
Lanthanide ion doped nanoparticles can coordinate with some organic ligands to form the inorganic–organic hybrid nanoparticles, which exhibit greatly enhanced luminescence as a result of the energy transfer from the organic ligands to the lanthanide ions. However, when coordinating with a single type of organic ligand, their luminescence excitation spectral bandwidth is still quite limited. In this work, Eu3+-doped LaF3 (LaF3:Eu3+) nanoparticles, as the model inorganic material, were synthesized using the hydrothermal method. Instead of coordinating with a single type of organic ligand as previously studied, the LaF3:Eu3+ nanoparticles simultaneously coordinate with both benzoic acid and 2-thenoyltrifluoroacetone to form the inorganic–organic mixed hybrid nanoparticles. The mixed hybrid nanoparticles possess a broadband excitation spectrum (200~400 nm) which perfectly covers the entire ultraviolet (UV) spectral range of the solar radiation. By down-converting the UV light to visible light, their broadband UV excitation spectrum will be extremely beneficial to the enhancement of the conversion efficiency of silicon solar cells.