Relation between Excitation Power Density and Er3+ Doping Yielding the Highest Absolute Upconversion Quantum Yield

2014 ◽  
Vol 118 (51) ◽  
pp. 30106-30114 ◽  
Author(s):  
Stefan Fischer ◽  
Benjamin Fröhlich ◽  
Karl W. Krämer ◽  
Jan Christoph Goldschmidt
Keyword(s):  
Quantum Yield ◽  
Power Density ◽  
Excitation Power ◽  
Excitation Power Density

Beam-profile-compensated quantum yield measurements of upconverting nanoparticles

2017 ◽  
Vol 19 (33) ◽  
pp. 22016-22022 ◽  
Author(s):  
Monirehalsadat Mousavi ◽  
Björn Thomasson ◽  
Meng Li ◽  
Marco Kraft ◽  
Christian Würth ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Power Density ◽  
Excitation Power ◽  
Beam Profile ◽  
Excitation Power Density ◽  
Luminescence Signal

The UCNP luminescence signal depends non-linearly on the excitation power density, making beam profiling essential in quantum yield measurements. The 2D Gaussian and its squared profile illustrates this concept.

Low-Power Triplet-Triplet Annihilation Upconversion with a New Anthracene Derivatives

2016 ◽  
Vol 852 ◽  
pp. 1265-1270
Author(s):  
Sai Jiang Zhu ◽  
Chang Qing Ye ◽  
Yan Fu ◽  
Zuo Qing Liang ◽  
Xiao Mei Wang
Keyword(s):  
Quantum Yield ◽  
Low Power ◽  
Power Density ◽  
High Efficiency ◽  
Excitation Power ◽  
Quantum Yields ◽  
Excitation Power Density ◽  
High Quantum ◽  
Anthracene Derivatives ◽  
Triplet Triplet Annihilation

Two new anthracene derivatives were synthesized as emitter for low power triplet-triplet annihilation upconversion. Compared with anthracene, the emitter exhibits high quantum yields up to 85%. Pd (II) tetraphenylporphyrin which was selected as the sensitizer with the existence of BBA in DMF, We find a pretty high efficiency (Φuc=21.9%) of the upconversion fluorescence at 532nm with a low excitation power density of 0.5w/cm2.With the comparison of Anthracene, BBA and BTPA systems, quantum yield of the emitter is very important to the improving of the efficiency of upconversion.

The sensitization of laser-induced heat of Er3+ doped Y2O3 nanocrystals by codoped with Mn2+

2015 ◽  
Vol 29 (22) ◽  
pp. 1550158
Author(s):  
Yunfeng Bai ◽  
Minjie Luan ◽  
Linjun Li ◽  
Zhelong He ◽  
Dongyu Li
Keyword(s):  
Power Density ◽  
Thermal Emission ◽  
Energy Levels ◽  
Excitation Power ◽  
Threshold Power ◽  
Excitation Power Density ◽  
Ir Laser ◽  
Order Of Magnitude ◽  
Low Threshold ◽  
Density Threshold

Low threshold power density cw laser-induced heat has been observed in [Formula: see text] and [Formula: see text] codoped [Formula: see text] nanocrystals under excitation by a 980 nm IR laser. Codoped [Formula: see text] remarkably reduces the power density threshold of laser-induced heat compared with [Formula: see text] doped [Formula: see text] nanocrystals. When the excitation power density exceed [Formula: see text], [Formula: see text] codoped [Formula: see text] nanocrystals emit strong blackbody radiation. The thermal emission of [Formula: see text] should originate from the multiphonon relaxation between neighboring energy levels. One additional UC-PL enhancement is observed. The UC-PL intensity can be enhanced by an order of magnitude through high temperature calcination caused by light into heat.

Excitation-Power-Density Dependent ac Surface Photovoltages in Radiation-Damaged Si Wafer

1984 ◽  
Vol 23 (Part 1, No. 6) ◽  
pp. 778-779 ◽  
Author(s):  
Chusuke Munakata ◽  
Noriaki Honma ◽  
Hajime Hayakawa
Keyword(s):  
Power Density ◽  
Excitation Power ◽  
Excitation Power Density ◽  
Density Dependent ◽  
Si Wafer

Effect of excitation power density on the upconversion luminescence of LaF3:Yb3+, Er3+ nanocrystals

2009 ◽  
Vol 485 (1-2) ◽  
pp. 493-496 ◽  
Author(s):  
Yuqiu Qu ◽  
Xianggui Kong ◽  
Yajuan Sun ◽  
Qinghui Zeng ◽  
Hong Zhang
Keyword(s):  
Power Density ◽  
Upconversion Luminescence ◽  
Excitation Power ◽  
Excitation Power Density

A microfluidic-photonic-integrated device with enhanced excitation power density

2010 ◽  
Author(s):  
Benjamin R. Watts ◽  
Thomas Kowpak ◽  
Chang-Qing Xu ◽  
Shiping Zhu ◽  
Zhiyi Zhang
Keyword(s):  
Power Density ◽  
Excitation Power ◽  
Excitation Power Density ◽  
Integrated Device
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