scholarly journals GaP Homojunction LEDs Fabricated by Dressed-Photon-Phonon-Assisted Annealing

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Jun Hyoung Kim ◽  
Tadashi Kawazoe ◽  
Motoichi Ohtsu
Keyword(s):  
Single Crystal ◽  
Photon Energy ◽  
Energy Band ◽  
Emission Intensity ◽  
Light Emission ◽  
Forward Bias ◽  
Bias Current ◽  
Bandgap Energy ◽  
Light Emission Intensity

By using a homojunction-structured GaP single crystal, we generated a photon energy higher than the bandgap energy (2.26 eV). The device was fabricated by performing dressed-photon-phonon- (DPP-) assisted annealing, while applying a forward-bias current, on a p-n homojunction structure formed by implanting a dopant (Zn) into an n-type GaP substrate. The DPP-assisted annealing increased the light emission intensity in an energy band above 2.32 eV by at least 550% compared with that before annealing.

scholarly journals Visible and Infrared Rare-Earth Activated Electroluminescence from Erbium Doped GaN

1999 ◽  
Vol 4 (S1) ◽  
pp. 940-945 ◽  
Author(s):  
M. Garter ◽  
R. Birkhahn ◽  
A. J. Steckl ◽  
J. Scofield
Keyword(s):  
Indium Tin Oxide ◽  
Ground State ◽  
Reverse Bias ◽  
Light Emission ◽  
Forward Bias ◽  
Bias Current ◽  
Emission Lines ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Ir Light

Room temperature visible and IR light electroluminescence (EL) has been obtained from Er-doped GaN Schottky barrier diodes. The GaN was grown by molecular beam epitaxy on Si substrates using solid sources (for Ga and Er) and a plasma source for N2. Transparent contacts utilizing indium tin oxide were employed. Strong green light emission was observed under reverse bias due to electron impact excitation of the Er atoms. Weaker emission was present under forward bias. The emission spectrum consists of two narrow green lines at 537 and 558 nm and minor peaks at 413, 461, 665, and 706 nm. There is also emission at 1000 nm and 1540 nm in the IR. The green emission lines have been identified as Er transitions from the 2H11/2 and 4S3/2 levels to the 4I15/2 ground state. The IR emission lines have been identified as transitions from the 4I11/2 and 4I13/2 levels to the 4I15/2 ground state. EL intensity for visible and IR light has a sub-unity power law dependence on bias current. An external quantum efficiency of 0.1% has also been demonstrated under a reverse bias current of 3.85 mA.

Combinatorial approach toward optimization of the light emission intensity of AlOxNy:Yb3+ thin films

2019 ◽  
Vol 58 (12) ◽  
pp. 3097 ◽  
Author(s):  
K. Y. Tucto ◽  
W. Aponte ◽  
J. A. Dulanto ◽  
J. A. Töfflinger ◽  
J. A. Guerra ◽  
...  
Keyword(s):  
Thin Films ◽  
Emission Intensity ◽  
Light Emission ◽  
Combinatorial Approach ◽  
Light Emission Intensity

An Automated Procedure for the Sensitive and Specific Determination of ATP

1969 ◽  
Vol 15 (1) ◽  
pp. 3-14 ◽  
Author(s):  
K Van Dyke ◽  
R Stitzel ◽  
T McClellan ◽  
C Szustkiewicz
Keyword(s):  
Emission Intensity ◽  
Light Emission ◽  
Reading Error ◽  
Specific Determination ◽  
Run Up ◽  
Light Emission Intensity

Abstract An automated procedure is described for the measurement of ATP. This method, based on the linear luminescence response of firefly extracts added to ATP, is rapid, reproducible, and allows a relatively large number of samples to be run (up to 35/hr.). A procedure is also given for the preparation of the luciferin-luciferase system from dried firefly lanterns. Sample volumes required are small, and reading error is about ± 3%. Uniform timing of the addition of reagents and reading of light emission intensity for each sample are insured. Variables investigated include dilution of firefly extract, alterations in time after mixing sample and enzyme, linearity, cation, anion, and ADP and AMP interference.

scholarly journals Microwave-assisted modulation of light emission intensity in alkali-pyrotechnic plumes

2021 ◽  
Vol 225 ◽  
pp. 406-416
Author(s):  
Stuart J. Barkley ◽  
Joel E. Lynch ◽  
Eric J. Miklaszewski ◽  
Jonathan M. Dilger ◽  
William F. Crespo ◽  
...  
Keyword(s):  
Emission Intensity ◽  
Light Emission ◽  
Microwave Assisted ◽  
Light Emission Intensity
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