Deep Ultra-Violet (DUV) Light Emitting Diodes

We synthesized and characterized novel highly phenyl-substituted spirobifluorene and carbazole derivatives such as 3,6-bis[(2,3,4,5-tetraphenyl)phenyl]-9-ethylcarbazole (BTPEC); 3,6-bis(7,10-diphenyl-fluoranthene)-9-ethylcarbazole (BDFEC); 2,7-Bis[(2,3,4,5-tetraphenyl)phenyl]-9,9′-spirobifluorene (BTPSF); and 3,6-bis(7,10-diphenyl-fluo-ran-thene)-9,9′-spirobifluorene (BDFSF), through Diels–Alder reaction. BDFEC showed sky blue PL spectrum at 481 nm and BTPSF showed ultra-violet PL spectrum at 374 nm in chloroform solution. Also BTPEC and BDFSF exhibited PL spectrum at around the UV region, 390 and 467 nm.

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Buried graphene electrodes on GaN-based ultra-violet light-emitting diodes

Applied Physics Letters ◽

10.1063/1.4733981 ◽

2012 ◽

Vol 101 (3) ◽

pp. 031108 ◽

Cited By ~ 24

Author(s):

Byung-Jae Kim ◽

Chongmin Lee ◽

Michael A. Mastro ◽

Jennifer K. Hite ◽

Charles R. Eddy ◽

...

Keyword(s):

Light Emitting Diodes ◽

Ultra Violet ◽

Light Emitting ◽

Ultra Violet Light ◽

Violet Light

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TiO2 Photocatalytic Degradation of Methylene Blue Dye by Utilizing Ultra Violet Light Emitting Diodes as Radiation Source

Advanced Science Letters ◽

10.1166/asl.2016.6943 ◽

2016 ◽

Vol 22 (4) ◽

pp. 834-838

Author(s):

Mushtaq Ahmad Rather ◽

Ashok N. Bhaskarwar ◽

Akshey Modi ◽

Anjan Raina ◽

Deep Priya Kapoor

Keyword(s):

Methylene Blue ◽

Photocatalytic Degradation ◽

Radiation Source ◽

Light Emitting Diodes ◽

Ultra Violet ◽

Blue Dye ◽

Methylene Blue Dye ◽

Light Emitting ◽

Ultra Violet Light ◽

Violet Light

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247 nm Ultra-Violet Light Emitting Diodes

Japanese Journal of Applied Physics ◽

10.1143/jjap.46.l263 ◽

2007 ◽

Vol 46 (No. 12) ◽

pp. L263-L264 ◽

Cited By ~ 24

Author(s):

Jianyu Deng ◽

Yuriy Bilenko ◽

Alex Lunev ◽

Xuhong Hu ◽

Thomas M. Katona ◽

...

Keyword(s):

Light Emitting Diodes ◽

Ultra Violet ◽

Light Emitting ◽

Ultra Violet Light ◽

Violet Light

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Self-Activated Green-Yellow Emitting Gd2CaZnO5 Phosphor for Efficient Ultra-Violet Light-Emitting Diodes

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2020.17499 ◽

2020 ◽

Vol 20 (6) ◽

pp. 3754-3761 ◽

Cited By ~ 1

Author(s):

Naina Lohia ◽

Savvi Mishra ◽

Swati Bishnoi ◽

G. Swati ◽

Vishnu V. Jaiswal ◽

...

Keyword(s):

Light Emitting Diodes ◽

Surface Defects ◽

Broad Band ◽

Ultra Violet ◽

Yellow Emission ◽

Electromagnetic Spectrum ◽

Light Emitting ◽

Ultra Violet Light ◽

Violet Light ◽

High Temperature Xrd

A new self-activated green-yellow emitting Gd2CaZnO5 (GCZO) phosphor was synthesized using solid-state reaction method at high-temperature. XRD analysis confirmed the orthorhombic structure of the sample with the Pbnm space group. SEM micrographs reveal the irregular morphology with micron sized particles. Detailed photoluminescence (PL) analysis revealed that the excitation of the phosphor lies in the UV range (˜377 nm) with the related broad green-yellow emission centered at 530 nm. The broad band emission ranging from ˜450 nm to 650 nm can be attributed to the surface defects and oxygen vacancies. The calculated luminescence decay lifetime for the optimized phosphor was found to be 2.925 μs. Furthermore, the color-coordinate (x, y) were calculated and found to be (0.44, 0.45), which lies in the green-yellow (˜540 nm) region of the electromagnetic spectrum. The values of color coordinates and Color correlated temperature of 3289 K support the synthesized phosphor for the emission of warm white-light. These results perfectly established the suitability of this green-yellow emitting GCZO phosphor for Ultra-Violet Light-Emitting Diodes (LEDs) excited white-LED applications.

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