
Strong red and NIR emission in NaYF4:Yb3+,Tm3+/QDs …
These results indicated that the interactions in the NaYF 4:Yb 3+,Tm 3+ /CdS nanoheterostructure played a key role for enhancing the NIR emission of NaYF 4:Yb 3+,Tm 3+ nanocrystals. QDs act as a sub energy level to mediate energy transfer of Tm 3+.
NaYF4:Er3+,Yb3+/SiO2 Core/Shell Upconverting Nanocrystals for ...
2017年1月20日 · Authors report highly luminescent multishell QDs showing almost unit of QE and white QDs-LEDs showing 41 lmW-1 efficacy and 100% reproducibility. The synthesis of green CdSe/ZnS/CdSeS and red CdSe/CdS/ZnS/CdSeS quantum dots is described. The QDs were packaged as green and red converters in blue LEDs to prep. white LEDs for display backlights.
NIR triggered NaYF4:Yb3+,Tm3+@NaYF4/CsPb(Br1-x/Ix)3
2022年3月1日 · Metal halide (CsPbX 3, X = Cl, Br, and I) semiconductor QDs/nanocrystals (NCs) with perovskite structure exhibit remarkable photoluminescence quantum yield (PLQY), large absorption coefficients, narrow-band emission, high tolerance to defects, and color tunability by varying the halide composition over the entire visible region [[27], [28], [29 ...
NaYF4∶Yb3+,Tm3+/CdSe纳米异质结构的近红外上转换发光性能
2015年5月5日 · 通过对β-NaYF4∶Yb3+,Tm3+纳米粒子的表面进行适当的修饰,可以减弱紫外和蓝光发射,并可增强~800 nm近红外光发射,这在生物医学应用方面具有重要意义[4]。半导体量子点(QDs)的吸收范围宽、发射峰窄,并且其发光峰具有随尺寸改变而移动的量子限域效应[13]。
(PDF) Strong red and NIR emission in NaYF4:Yb3+,Tm3+/QDs ...
2013年1月17日 · These results indicated that the interactions in the NaYF4:Yb3+,Tm3+/CdS nanoheterostructure played a key role for enhancing the NIR emission of NaYF4:Yb3+,Tm3+ nanocrystals. QDs act as a sub...
Enhanced near-infrared upconversion luminescence of NaYF4…
2016年6月15日 · As a result, the conjugation between NaYF 4 and CdSe QDs resulted in the quenching of blue and UV emission and great enhancement of NIR emission, simultaneously no CdSe emission observed.
上转换发光材料nayf4纳米晶的可控制备、生长机理及表面修饰的 …
2020年2月13日 · 本论文围绕稀土掺杂NaYF4. 纳米晶的可控制备、生长机理以及与CdSe量子点的结合等研究开展了一系列工. 作。 主要研究内容如下: (1)为了能够得到形貌均一、粒径均匀、单分散的NaYF4纳米材料,我们. 研究组结合了化学、电学、机械学等多领域学科知识,历时多年完成了全自动纳. 米材料合成仪(ANS01/02型合成仪器)的研制、开发与测试工作。 该仪器不仅. 帮助科研人员简化手工实验操作的过程、节省时间,而且能够更加稳定可靠地合. 成纳米材料 …
Enhancing optical functionality by co-loading NaYF4:Yb,Er and CdSe QDs ...
Colloidal, oil-core polymer-shell nanocapsules (NCs), loaded with both upconversion NaYF4:Yb,Er nanoparticles (NPs) and CdSe quantum dots (QDs), were prepared via nanoemulsification/solvent-evaporation methods. Transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffr
稀土掺杂NaYF_(4)纳米颗粒的控制合成及上转换发光性质研究
UC氟化物纳米 材料与半导体量子点(QDs)和有机染料相比,具有被生物组织吸收少、自发荧光干扰低、低毒性、较长的荧光 衰减寿命、较强的穿透组织细胞的能力等优点[9]。 所以,它在光动力治疗、生产功能性光学器件、自组装、生 物探针、生物标记等领域具有广泛的应用前景[10一11]。 本文采用水热法,在OA/HA体系中通过调节NaF和RE摩尔比合成了单分散的—NaYF4和 毬-NaYF4 NCs。 运用XRD.TEM等测试手段探究了 0-NaYF4纳米棒的生长机理以及从a(立方) …
Strong red and NIR emission in NaYF4:Yb3+,Tm3+/QDs …
2013年1月17日 · These results indicated that the interactions in the NaYF4:Yb3+,Tm3+/CdS nanoheterostructure played a key role for enhancing the NIR emission of NaYF4:Yb3+,Tm3+ nanocrystals. QDs act as a sub energy level to mediate energy transfer of Tm3+.
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