Luminescent Properties of Ca2-XBO3Cl:xDy3+ Phosphors for White Light-Emitting Diodes

2010 ◽  
Vol 663-665 ◽  
pp. 434-436
Author(s):  
Qing Xuan Yang ◽  
Xiao Guang Fu ◽  
Xiao Jun Wang
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Uv Light ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Luminescent Properties ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Optimal Doping Concentration ◽  
White Light Emitting Diodes

Novel single-phase Ca2-xBO3Cl:xDy3+ phosphors were synthesized at 900 oC in an activated carbon reducing atmosphere, and their luminescent properties were investigated by photoluminescence (PL) and photoluminescence excitation (PLE) spectra. The optimal doping concentration of Dy3+ ions is found to be x=0.03 mol, and the nature of resonance energy transfer for Dy3+ ions is also discussed. Generation of white-light excited by 390 near-ultraviolet (n-UV) light shows that all the investigated phosphors lie within white region and the colour coordinate of Ca1.95BO3Cl:0.05Dy3+ (0.272, 0.326) is closer to the equal-energy white light point, which is potentially a good candidate as an n-UV-converted phosphor for white light-emitting diodes (LEDs).

NOVEL BLUE-EMITTING KSrBP2O8: Eu2+ PHOSPHOR FOR NEAR-UV LIGHT-EMITTING DIODES

2012 ◽  
Vol 05 (04) ◽  
pp. 1250048 ◽  
Author(s):  
YAN WEN ◽  
YUHUA WANG ◽  
BITAO LIU ◽  
FENG ZHANG ◽  
YURONG SHI
Keyword(s):  
White Light ◽  
Emission Band ◽  
Light Emitting Diodes ◽  
Uv Light ◽  
Light Emitting ◽  
Long Wavelength ◽  
Near Ultraviolet ◽  
Optimal Sample ◽  
Strong Excitation ◽  
White Light Emitting Diodes

A blue-emitting borophosphate KSrBP2O8: Eu2+ is synthesized and evaluated as a candidate for near ultraviolet white light emitting diodes. This phosphor shows strong excitation band in 250~420 nm, and a broad and asymmetry emission band with a tail on the long-wavelength side. According to investigating on the crystal structure, the asymmetry emission band results from the certain degree of substitutional disorder of Eu 2+ in KSrBP2O8: Eu2+ . The emission intensity of the optimal sample with 5% Eu 2+ is reached to 89% of that of the commercial BaMgAl10O17: Eu2+ under excitation at 365 nm, and the quantum efficiency of the optimal sample is 48.9%. The results reveal that the potential application of KSrBP2O8: 5% Eu2+ as a blue-emitting UV convertible phosphor for white light emitting diodes is feasible.

Studies on Föster Resonance Energy Transfer in Blends of Thienylene Vinylenes for White Light Emitting Diodes

2010 ◽  
Vol 2 (3) ◽  
pp. 231-234 ◽  
Author(s):  
Soundaram Jeevarathinam Ananthakrishnan ◽  
Narayanasastri Somanathan ◽  
Muthuramalingam Prakash ◽  
Venkatesan Subramanian ◽  
Asit Baran Mandal
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Light Emitting Diodes ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Light Emitting ◽  
White Light Emitting Diodes

scholarly journals Preparation of CdTe superparticles for white light-emitting diodes without Förster resonance energy transfer

RSC Advances ◽  
2019 ◽  
Vol 9 (53) ◽  
pp. 30797-30802
Author(s):  
Haoyang Zou ◽  
Deli Wang ◽  
Baijuan Gong ◽  
Yi Liu
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Light Emitting Diodes ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Förster Resonance Energy Transfer ◽  
Light Emitting ◽  
Conversion Materials ◽  
White Light Emitting Diodes ◽  
Color Conversion

CdTe superparticles are used as the color conversion materials for the fabrication of WLEDs without FRET.

A novel near-ultraviolet-light excitable Eu3+-doped Sr2LaTaO6 red phosphor for white-light-emitting diodes

Optik ◽  
2021 ◽  
Vol 240 ◽  
pp. 166908
Author(s):  
Qifeng Tang ◽  
Tao Yang ◽  
Haifeng Huang ◽  
Jinqing Ao ◽  
Biyou Peng ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
White Light ◽  
Light Emitting Diodes ◽  
Red Phosphor ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
White Light Emitting Diodes

scholarly journals Broad near-ultraviolet and blue excitation band induced dazzling red emissions in Eu3+-activated Gd2MoO6 phosphors for white light-emitting diodes

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3170-3178 ◽  
Author(s):  
Peng Du ◽  
Yue Guo ◽  
Soo Hyun Lee ◽  
Jae Su Yu
Keyword(s):  
Citric Acid ◽  
White Light ◽  
Light Emitting Diodes ◽  
Sol Gel ◽  
Excitation Band ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Blue Excitation ◽  
White Light Emitting Diodes

A series of Eu3+-activated Gd2MoO6 phosphors were synthesized via a citric acid-assisted sol–gel route.

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