Highly improved upconversion luminescence in NaGd(WO4)2:Yb3+/Tm3+inverse opal photonic crystals

Nanoscale ◽  
2015 ◽  
Vol 7 (4) ◽  
pp. 1363-1373 ◽  
Author(s):  
Yunfeng Wang ◽  
Wen Xu ◽  
Shaobo Cui ◽  
Sai Xu ◽  
Ze Yin ◽  
...  
2016 ◽  
Vol 16 (4) ◽  
pp. 3739-3743
Author(s):  
Siqin Wang ◽  
Jianbei Qiu ◽  
Qi Wang ◽  
Dacheng Zhou ◽  
Zhengwen Yang

For this paper, YPO4: Tm, Yb inverse opals with the photonic band gaps at 475 nm and 655 nm were prepared by polystyrene colloidal crystal templates. We investigated the influence of photonic band gaps on the Tm-Yb upconversion emission which was in the YPO4: Tm Yb inverse opal photonic crystals. Comparing with the reference sample, significant suppression of both the blue and red upconversion luminescence of Tm3+ ions were observed in the inverse opals. The color purity of the blue emission was improved in the inverse opal by the suppression of red upconversion emission. Additionally, mechanism of upconversion emission in the inverse opal was discussed. We believe that the present work will be valuable for not only the foundational study of upconversion emission modification but also the development of new optical devices in upconversion lighting and display.


2015 ◽  
Vol 641 ◽  
pp. 127-131 ◽  
Author(s):  
Zhengwen Yang ◽  
Hangjun Wu ◽  
Jun Li ◽  
Bo Shao ◽  
Jianbei Qiu ◽  
...  

2018 ◽  
Vol 140 (48) ◽  
pp. 16446-16449 ◽  
Author(s):  
Ke Hou ◽  
Wajid Ali ◽  
Jiawei Lv ◽  
Jun Guo ◽  
Lin Shi ◽  
...  

2009 ◽  
Vol 471 (1-2) ◽  
pp. 241-243 ◽  
Author(s):  
Zhengwen Yang ◽  
Ji Zhou ◽  
Xueguang Huang ◽  
Qin Xie ◽  
Ming Fu ◽  
...  

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 827 ◽  
Author(s):  
Tharishinny Raja-Mogan ◽  
Bunsho Ohtani ◽  
Ewa Kowalska

Noble metal (NM)-modified wide-bandgap semiconductors with activity under visible light (Vis) irradiation, due to localized surface plasmon resonance (LSPR), known as plasmonic photocatalysts, have been intensively studied over the last few years. Despite the novelty of the topic, a large number of reports have already been published, discussing the optimal properties, synthesis methods and mechanism clarification. It has been proposed that both efficient light harvesting and charge carriers’ migration are detrimental for high and stable activity under Vis irradiation. Accordingly, photonic crystals (PCs) with photonic bandgap (PBG) and slow photon effects seem to be highly attractive for efficient use of incident photons. Therefore, the study on PCs-based plasmonic photocatalysts has been conducted, mainly on titania inverse opal (IO) modified with nanoparticles (NPs) of NM. Although, the research is quite new and only several reports have been published, it might be concluded that the matching between LSPR and PBG (especially at red edge) by tuning of NMNPs size and IO-void diameter, respectively, is the most crucial for the photocatalytic activity.


2016 ◽  
Vol 27 (40) ◽  
pp. 405202 ◽  
Author(s):  
Yongsheng Zhu ◽  
Shaobo Cui ◽  
Yinhua Wang ◽  
Mao Liu ◽  
Cheng Lu ◽  
...  

RSC Advances ◽  
2015 ◽  
Vol 5 (127) ◽  
pp. 104862-104869 ◽  
Author(s):  
Shaobo Cui ◽  
Wen Xu ◽  
Yongsheng Zhu ◽  
Xu Chen ◽  
Donglei Zhou ◽  
...  

NaY(MoO4)2:Yb3+/Er3+ inverse opal photonic crystals were fabricated and the UCL efficiency of Er3+ was improved due to the periodic macroporous structure.


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