Structural and an orange-red emission studies of Sm3+ doped Ba3La2 (BO3)4 phosphor for solid state lighting application

Mn4+-activated oxidefluoride phosphors are attractive for application in wide solid-state lighting devices because of its distinct red emission at about 630 nm and the abundant storage of Mn4+ ion. However,...

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Excitation-Independent Emission of Carbon Quantum Dot Solids

Advances in Materials Science and Engineering ◽

10.1155/2020/9643168 ◽

2020 ◽

Vol 2020 ◽

pp. 1-5

Author(s):

Xuan-Dung Mai ◽

Yen Thi Hai Phan ◽

Van-Quang Nguyen

Keyword(s):

Solid State ◽

Solvothermal Method ◽

Blue Emission ◽

Carbon Quantum Dots ◽

Solid State Lighting ◽

Optical And Electrical Properties ◽

Red Emission ◽

Solid Films ◽

Carbon Quantum Dot ◽

S States

Solid assemblies of carbon quantum dots (CQDs) are important for diverse applications including LEDs, solar cells, and photosensors; their optical and electrical properties have not been explored yet. Herein, we used amphiphilic CQDs synthesized from citric acid and thiourea by a solvothermal method to fabricate CQD solid films. Optical properties of CQDs studied by UV-Vis and photoluminescence spectroscopies indicate that CQDs possess three different emission centers at 425 nm, 525 nm, and 625 nm originating from C sp2 states, N-states, and S-states, respectively. In a solid state, π-π stacking quenched the blue emission, while the red emission increased. Importantly, CQD films exhibited excitation independence, which is important to design solid-state lighting applications.

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Obtaining Efficiently Tunable Red Emission in Ca3-δLnδWO6:Mn4+ (Ln = La, Gd, Y, Lu, δ = 0.1) Phosphors Derived from Nearly Nonluminescent Ca3WO6:Mn4+ via Ionic Substitution Engineering for Solid-State Lighting

ACS Sustainable Chemistry & Engineering ◽

10.1021/acssuschemeng.0c02444 ◽

2020 ◽

Vol 8 (19) ◽

pp. 7256-7261

Author(s):

Kai Li ◽

Rik Van Deun

Keyword(s):

Solid State ◽

Solid State Lighting ◽

Red Emission ◽

Ionic Substitution

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Vertical GaN based Light Emitting Diodes on Metal Alloy Substrate for Solid State Lighting Application

10.1117/12.673987 ◽

2006 ◽

Cited By ~ 6

Author(s):

T. Doan ◽

C. Chu ◽

C. Chen ◽

W. Liu ◽

J. Chu ◽

...

Keyword(s):

Solid State ◽

Light Emitting Diodes ◽

Metal Alloy ◽

Solid State Lighting ◽

Light Emitting ◽

Alloy Substrate ◽

Lighting Application

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Blue Upconversion Luminescence from Phosphor Tm3+/Yb3+ Co-Doped Gd2Mo3O9

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.683.3 ◽

2013 ◽

Vol 683 ◽

pp. 3-6

Author(s):

Jia Yue Sun ◽

Bing Xue ◽

Guang Chao Sun ◽

Dian Peng Cui ◽

Hai Yan Du

Keyword(s):

Solid State ◽

Upconversion Luminescence ◽

Blue Emission ◽

Solid State Reaction Method ◽

Solid State Lighting ◽

Red Emission ◽

Reaction Method ◽

X Ray ◽

Strong Blue Emission ◽

Co Doped

The upconversion (UC) luminescence properties of phosphor Tm3+/Yb3+co-doped Gd2Mo3O9were investigated in detail. Tm3+/Yb3+co-doped Gd2Mo3O9was prepared by solid-state reaction method using Na2CO3as flux and characterized by powder X-ray diffractometry. Under 980nm excitation, Tm3+/Yb3+co-doped Gd2Mo3O9has exhibited a weak red emission near 651nm and strong blue emission at 476nm. Tm3+/Yb3+co-doped Gd2Mo3O9phosphor has been considered as a better candidate in solid-state lighting applications.

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