Self-host thermally activated delayed fluorescent dendrimers with flexible chains: an effective strategy for non-doped electroluminescent devices based on solution processing

2016 ◽  
Vol 4 (37) ◽  
pp. 8810-8816 ◽  
Author(s):  
Xinxin Ban ◽  
Wei Jiang ◽  
Tingting Lu ◽  
Xiaofang Jing ◽  
Qifeng Tang ◽  
...  
Keyword(s):  
Concentration Quenching ◽  
Solution Processing ◽  
Effective Strategy ◽  
Electroluminescent Devices ◽  
Quenching Effect ◽  
Thermally Activated ◽  
Fluorescent Dendrimers ◽  
Concentration Quenching Effect

Due to the encapsulation of the emissive core, the concentration quenching effect of the TADF material can be effectively restrained.

Ester-functionalized thermally activated delayed fluorescence materials

2021 ◽  
Author(s):  
Hiroshi Tasaki ◽  
So Shikita ◽  
In Seob Park ◽  
Takuma Yasuda
Keyword(s):  
Delayed Fluorescence ◽  
Concentration Quenching ◽  
Thermally Activated Delayed Fluorescence ◽  
Quenching Effect ◽  
Thermally Activated ◽  
Concentration Quenching Effect ◽  
Neat Films

A family of thermally activated delayed fluorescence (TADF) materials functionalized with carboxylate esters is presented herein. Owing to their suppressed concentration-quenching effect in neat films, these ester-functionalized TADF emitters could...

Modeling of thermoluminescence in SrY2O4:Eu3+and their concentration quenching effect

Optik ◽  
2021 ◽  
Vol 232 ◽  
pp. 166607
Author(s):  
Amirouche Bouremani ◽  
Dahane Kadri ◽  
Ahmed Kadari ◽  
Vikas Dubey
Keyword(s):  
Concentration Quenching ◽  
Quenching Effect ◽  
Concentration Quenching Effect

Correlations between the structural transformations and concentration quenching effect for RE-implanted ZnO systems

2020 ◽  
Vol 521 ◽  
pp. 146421
Author(s):  
Renata Ratajczak ◽  
Cyprian Mieszczynski ◽  
Sławomir Prucnal ◽  
Tomasz A. Krajewski ◽  
Elżbieta Guziewicz ◽  
...  
Keyword(s):  
Structural Transformations ◽  
Concentration Quenching ◽  
Quenching Effect ◽  
Concentration Quenching Effect

Luminescence and Optical Properties of Li2O3:Gd2O3:B2O3:Sm2O3 Glasses System

2014 ◽  
Vol 979 ◽  
pp. 479-482 ◽  
Author(s):  
Warawut Sa-Ardsin ◽  
Patarawagee Yasaka ◽  
J. Kaewkhao ◽  
K. Boonin
Keyword(s):  
Optical Properties ◽  
Absorption Spectra ◽  
Excited States ◽  
Emission Spectra ◽  
Concentration Quenching ◽  
Excitation Spectra ◽  
Quenching Effect ◽  
Air Atmosphere ◽  
Glass Matrices ◽  
Concentration Quenching Effect

The samarium-doped lithium-gadolinium borate [60Li2O:10Gd2O3:(30-x) B2O3:xSm2O3] (LGBO:Sm3+) glasses have been melted and quenched in stainless plate under an air atmosphere. Some physical and optical properties within wavelength concerned and photoluminescence of the LGBO:Sm3+glasses were measured and discussed. The density of glasses dropped until 0.10 mol% and tends to increase after that point, while molar volume of the glasses tends to increase with concentration of Sm2O3.. In absorption spectra, there are 2 obvious peaks in UV-VIS range and 6 peaks in NIR range indicating the Sm3+in glass matrices. The sharpness of a peak, in the absorption spectra, also increases with concentration of the dopant. The 7 obvious peaks in excitation spectra represent the transitions from the ground state6H5/2to various excited states. Furthermore, The emission spectra were observed under 404 nm light from the Xenon compact arc lamps, and showed the concentration quenching effect (CQE) at 1.00 mol% of Sm3+. Additional, The lifetimes showed decreasing trend with concentration of Sm2O3.. As the result, The LGBO:Sm3+glass doped with 1.00 mol% of Sm3+gives the highest result for luminescence properties.

Luminescent Properties of ZnxCa1–xTiO3:yPr3+ Long-Lasting Phosphors

2016 ◽  
Vol 35 (9) ◽  
pp. 963-966
Author(s):  
Yanzhi Meng ◽  
Xiaomin Wang ◽  
Yi Shen ◽  
Xiaoli Wei ◽  
Liying Han ◽  
...  
Keyword(s):  
Sol Gel ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Concentration Quenching ◽  
Molar Concentration ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Quenching Effect ◽  
Concentration Quenching Effect

AbstractThe red long-lasting phosphors (LLPs) ZnxCa1–xTiO3:yPr3+ (ZCTP) were successfully prepared via the sol–gel method. The effects of Zn2+ content and Pr3+ molar concentration on the luminescent properties of ZCTP LLPs were characterized by X-ray diffraction, excitation and emission spectra, long-lasting decay curves and thermoluminescence (TL) curves. In this study, the results indicated that luminescent properties of Zn0.2Ca0.8TiO3:0.2 %Pr3+ phosphor was the best. In addition, when Pr3+ molar concentration reached 0.8 mol %, concentration quenching effect was obvious.

Investigation of Er3+ Doped in Na2O-Al2O3-BaO-CaO-Sb2O3-B2O3 -SiO2 Glasses: Physical, Optical and Visible Luminescence Properties

2014 ◽  
Vol 974 ◽  
pp. 86-90
Author(s):  
S. Tuscharoen ◽  
N. Chanthima ◽  
J. Kaewkhao
Keyword(s):  
Molecular Weight ◽  
Green Emission ◽  
Concentration Quenching ◽  
Luminescence Properties ◽  
Doping Content ◽  
Quenching Effect ◽  
Visible Luminescence ◽  
Additional Doping ◽  
Glass Matrices ◽  
Concentration Quenching Effect

In this work, Na2O-Al2O3-BaO-CaO-Sb2O3-B2O3-SiO2 glasses doped with Er3+ was prepared and investigated for their physical, optical and visible luminescence properties. The increases in density, refractive index and molar volume of the glasses with additional doping content of Er2O3 into the network were due to a higher molecular weight and polarizability of Er2O3 in comparison with the glass former (SiO2 and B2O3). Ten absorption peaks were observed as a nature of Er3+ absorption in glass matrices. The glass exhibited four emission transitions which were assigned to 4F5/2→4I15/2 (460 nm), 4F7/2→4I15/2 (487 nm), 2H11/2→4I15/2 (522 nm) and 4S3/2→4I15/2 (545 nm) transitions. The strongest intensity was the green emission at 522 nm. The luminescence intensity was found to increase with Er2O3 content up to 4 mol% and it was decreased for higher Er2O3 contents due to concentration quenching effect.

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