Enhancement of the visible luminescence from the ZnO nanocrystals by Li and Al co-doping

2009 ◽  
Vol 129 (1) ◽  
pp. 12-16 ◽  
Author(s):  
J. Nayak ◽  
S. Kimura ◽  
S. Nozaki
Keyword(s):  
Co Doping ◽  
Visible Luminescence ◽  
Zno Nanocrystals

ZnO-NANOCRYSTALS IN STRONG CONFINEMENT REGIMES: INSIGHT ON RELAXATION DYNAMICS OF DEFECT STATES RESPONSIBLE FOR THE VISIBLE LUMINESCENCE

2011 ◽  
Vol 10 (04n05) ◽  
pp. 681-685
Author(s):  
ARUNASISH LAYEK ◽  
ARINDAM CHOWDHURY
Keyword(s):  
Surface Defects ◽  
Relaxation Dynamics ◽  
Relaxation Rates ◽  
Defect States ◽  
Radiative Relaxation ◽  
Time Resolved ◽  
Visible Luminescence ◽  
Zno Nanocrystals ◽  
Energy Dependent ◽  
Strong Confinement

The broad visible photoluminescence (PL) observed in ZnO nanocrystals (NCs) is widely attributed to multiple low lying surface-defects. We have performed steady state and time-resolved PL measurements on size-selected ZnO NCs in the strong confinement regimes. Our results show that radiative relaxation rates and coupling between excitons and surface defect states vary dramatically for sizes between 2 nm and 3 nm. Energy dependent PL lifetimes reveal that relaxation dynamics of these defect states in the blue- and red-edge of the emission are very different from each other.

Influence of Co doping on the structural, optical and magnetic properties of ZnO nanocrystals

2013 ◽  
Vol 578 ◽  
pp. 328-335 ◽  
Author(s):  
A. Kaushik ◽  
B. Dalela ◽  
R. Rathore ◽  
V.S. Vats ◽  
B.L. Choudhary ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Co Doping ◽  
Zno Nanocrystals ◽  
Optical And Magnetic Properties

Influence of Yb3+ co-doping on visible luminescence in ZBLAN:Ho3+ under 2-µm laser excitation

2021 ◽  
Vol 572 ◽  
pp. 121087
Author(s):  
Alexander Savikin ◽  
Kirill Sumachev ◽  
Igor Grishin ◽  
Valery Sharkov
Keyword(s):  
Laser Excitation ◽  
Co Doping ◽  
Visible Luminescence

Improvement of Bi doping in ZnO nanocrystals by co-doping with Al: crystal geometry calculations and photocatalytic activity

2020 ◽  
Vol 31 (50) ◽  
pp. 505716 ◽  
Author(s):  
Mahmoud M Emara ◽  
Abdelhamied A Hassan ◽  
Ali El-Dissouky ◽  
P Gregory Van Patten
Keyword(s):  
Photocatalytic Activity ◽  
Co Doping ◽  
Zno Nanocrystals ◽  
Bi Doping

Boosting visible luminescence of Tb3+-activated ZBLAN fluoride glasses by Dy3+ co-doping

2021 ◽  
pp. 118247
Author(s):  
Juping Ma ◽  
Yan Sun ◽  
Fei Yu ◽  
Tianfeng Xue ◽  
Lili Hu
Keyword(s):  
Fluoride Glasses ◽  
Co Doping ◽  
Visible Luminescence

The structure and optical properties of ZnO nanocrystals dependence on Co-doping levels

2010 ◽  
Vol 505 (1) ◽  
pp. 362-366 ◽  
Author(s):  
Sha Wang ◽  
Ping Li ◽  
Hui Liu ◽  
Jibiao Li ◽  
Yu Wei
Keyword(s):  
Optical Properties ◽  
Co Doping ◽  
Zno Nanocrystals

Enhanced and modulated visible luminescence of Pr3+:CaF2 crystal by co-doping R3+ (R=Y, Gd, Lu) ions

2021 ◽  
pp. 161327
Author(s):  
Wudi Wang ◽  
Jie Tian ◽  
Na Li ◽  
Jianshu Dong ◽  
Qingguo Wang ◽  
...  
Keyword(s):  
Caf2 Crystal ◽  
Co Doping ◽  
Visible Luminescence

Visible Luminescence of the InGaN/GaN Ultraviolet Light-emitting Diodes 365 nm

2017 ◽  
Vol 9 (5) ◽  
pp. 05031-1-05031-5 ◽  
Author(s):  
V. P. Veleschuk ◽  
◽  
A. I. Vlasenko ◽  
Z. K. Vlasenko ◽  
D. N. Khmil ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Visible Luminescence ◽  
Ultraviolet Light Emitting Diodes
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