Engineering the Active Region to Enhance the IQE by ~8% in AlGaN/GaN based UV-C LED

Abstract A compact reference UVC source based on commercially available LED has been developed. The article presents the design and results of the study of the optical characteristics of the radiation of the reference UVC LED source. The source provides a power density of radiation up to 400 μW/cm2 on area of 3×3 mm with inhomogeneity of 1.5 %.The emission band of a source with a maximum of 265 nm is predominantly 97 % in the UV-C spectrum region, and a small part of it is inUV-B and UV-A regions, 2.7 % and 0.3 %, respectively. The use of ComboSource for laser diodes allowed to precisionally stabilize the injection current and temperature of the LED. It is shown that overheating of the active region of the selected UV LED is only 10°C - 25°C at the recommended injection currents due to the peculiarities of its design. This results in a low degradation rate of the UV LED. Possible ways to improve the characteristics of the reference UVCsource are discussed.

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Polyphenols and their antioxidant activity in callus-cultured Malva neglecta cells under UV-B and UV-C irradiation

Planta Medica ◽

10.1055/s-0031-1282297 ◽

2011 ◽

Vol 77 (12) ◽

Author(s):

F Ghanati ◽

F Khatami

Keyword(s):

Antioxidant Activity ◽

Uv C

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Morphology of the flare-productive active region NOAA 9087

Kinematika i fizika nebesnyh tel (Online) ◽

10.15407/kfnt2020.03.069 ◽

2020 ◽

Vol 36 (3) ◽

pp. 69-90

Author(s):

S. N. Chornogor ◽

◽

N. N. Kondrashova ◽

Keyword(s):

Active Region ◽

Active Region Noaa ◽

Region Noaa

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REMOVING UV-A AND UV-C RADIATION FROM UV-B FLUORESCENT LAMP EMISSIONS. DIFFERENCES IN THE INHIBITION OF PHOTOSYNTHESIS IN THE MARINE ALGA DUNALIELLA TERTIOLECTA USING CHROMATE VERSUS CELLULOSE ACETATE/POLYESTER FILTERS

Photochemistry and Photobiology ◽

10.1562/2003-12-31-ra-040 ◽

2004 ◽

Cited By ~ 1

Author(s):

Andrea L. White ◽

Leland S. Jahnke

Keyword(s):

Cellulose Acetate ◽

Marine Alga ◽

Dunaliella Tertiolecta ◽

Fluorescent Lamp ◽

Uv C

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Interexperimental and Interindividual Variations of DNA Repair Capacities After UV-B and UV-C Irradiations of Human Keratinocytes and Fibroblasts

Photochemistry and Photobiology ◽

10.1562/ca-03-17.1 ◽

2004 ◽

Vol 79 (3) ◽

pp. 286 ◽

Cited By ~ 7

Author(s):

Marjorie Chazal ◽

Emeric Roux ◽

Claire Alapetite ◽

Christophe Roulin ◽

Ethel Moustacchi ◽

...

Keyword(s):

Dna Repair ◽

Human Keratinocytes ◽

Interindividual Variations ◽

Uv C

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Integrating Wireline Measurements to Provide Geomechanical Solutions: A Case Study for Optimizing Drilling by Improving Wellbore Stability in a Complex and Tectonically Active Region

10.2523/18908-ms ◽

2016 ◽

Author(s):

Sunit Roy ◽

G. K. S Roy ◽

R. S. Chauhan ◽

Somesh Bahuguna ◽

Joseph Zacharia ◽

...

Keyword(s):

Active Region ◽

Wellbore Stability ◽

Tectonically Active

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On-the-Fly Determination of Active Region Centers in Adaptive-Partitioning QM/MM

10.26434/chemrxiv.12376919 ◽

2020 ◽

Author(s):

Zenghui Yang

Keyword(s):

Quantum Mechanics ◽

Active Region ◽

Molecular Mechanics ◽

Active Regions ◽

Available Energy ◽

Adaptive Partitioning ◽

Different Levels

Quantum mechanics/molecular mechanics (QM/MM) methods partition the system into active and environmental regions and treat them with different levels of theory, achieving accuracy and efficiency at the same time. Adaptive-partitioning (AP) QM/MM methods allow on-the-fly changes to the QM/MM partitioning of the system. Many of the available energy-based AP-QM/MM methods partition the system according to distances to pre-chosen centers of active regions. For such AP-QM/MM methods, I develop an adaptive-center (AC) method that allows on-the-fly determination of the centers of active regions according to general geometrical or potential-related criteria, extending the range of application of energy-based AP-QM/MM methods to systems where active regions may occur or vanish during the simulation.

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