The application of Zn0.8Cd0.2S nanocrystals in white light emitting diodes devices

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87667-87671 ◽  
Author(s):  
Ya-Ching Chen ◽  
Cyuan-Bin Siao ◽  
Hong-Shuo Chen ◽  
Kuan-Wen Wang ◽  
Shu-Ru Chung
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Quantum Yields ◽  
Light Emitting ◽  
High Quantum ◽  
Ternary Semiconductor ◽  
White Light Emitting Diodes

In this study, colloidal ternary semiconductor Zn0.8Cd0.2S (ZnCdS) nanocrystals (NCs) with wide emission and high quantum yields (QYs) have been prepared and used as nanophosphors in white light emitting diodes (WLEDs).

scholarly journals Aqueous Synthesis of ZnSe/ZnS-2-R-Benzothiazole Nanocrystals with White Emission

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Ying-Fan Liu ◽  
Yan-Hui Zhang ◽  
Guo-Qing Wang ◽  
Kai-Ming Mao ◽  
Shao-Ming Fang ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Water Soluble ◽  
Quantum Yields ◽  
Aqueous Synthesis ◽  
Light Emitting ◽  
White Emission ◽  
White Light Emitting Diodes ◽  
Nm Range

We prepared water-soluble white light-emitting ZnSe/ZnS-2-R-benzothiazole nanocrystals (NCs), R = 2-hydroxy-5-(2,5-dimethyl-thienyl)-phenyl. The penicillamine (Pen) capped ZnSe/ZnS NCs were firstly prepared with high photoluminescence quantum yields (PL QY) of 40%. Then they bond to 2-R-benzothiazole molecules, resulting in white light-emitting ZnSe/ZnS-2-R-benzothiazole NCs with QY of 75% over a 375 to 650 nm range of emission, which can be applied to white light-emitting diodes. The ZnSe/ZnS-2-R-benzothiazole NCs with two emission bands at around 451 and 557 nm were discussed and the possible mechanism of the interaction of ZnSe/ZnS NCs with 2-R-benzothiazole was also proposed.

Eu2+-Doped NaBa4(AlB4O9)2X3 (X = Cl, Br) phosphors with intense two-center blue emission and high color purity for n-UV pumped white light-emitting diodes

2016 ◽  
Vol 4 (34) ◽  
pp. 7959-7965 ◽  
Author(s):  
Zhipeng Lian ◽  
Qingfeng Yan
Keyword(s):  
Quantum Efficiency ◽  
White Light ◽  
Light Emitting Diodes ◽  
Blue Emission ◽  
Color Purity ◽  
High Quantum Efficiency ◽  
Light Emitting ◽  
High Quantum ◽  
White Light Emitting Diodes ◽  
High Color Purity

Highly efficient blue-emitting NaBa4(AlB4O9)2X3 (X = Cl, Br):Eu2+ phosphors exhibit high quantum efficiency and better color purity than BAM:Eu2+.

scholarly journals Stable blue-emissive aluminum acetylacetonate nanocrystals with high quantum yield of over 80% and embedded in polymer matrix for remote UV-pumped white light–emitting diodes

Nanophotonics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1509-1518
Author(s):  
Hong Zheng ◽  
Bingkun Chen ◽  
Lifu Shi ◽  
Fa Zhang ◽  
Ziheng Zhao ◽  
...  
Keyword(s):  
Composite Film ◽  
White Light ◽  
Light Emitting Diodes ◽  
Composite Films ◽  
Blue Emission ◽  
Quantum Yields ◽  
Aluminum Compound ◽  
Light Emitting ◽  
Air Atmosphere ◽  
White Light Emitting Diodes

AbstractBlue-emissive nanocrystals (NCs) with high photoluminescence quantum yields (PL QYs) and excellent stability are essential for lighting and displays. Here, a facile top-down approach (including two steps: thermal annealing and ultrasonic treatment) by using aluminum acetylacetonate (Al(acac)3) as a precursor is adopted to fabricate blue-emissive Al(acac)3 NCs with high PL QY reaching 81.8%, the highest reported value for the aluminum compound-based NCs so far. Additionally, the as-fabricated Al(acac)3 NC solution (in toluene) exhibits high stability under air atmosphere condition, maintaining 61.2% of initial PL QY after 1 year. Furthermore, solution-processed Al(acac)3 NCs/poly(methyl methacrylate) (PMMA) composite film with blue emission is demonstrated. Finally, combinations of the blue-emitting Al(acac)3 NCs/PMMA composite film with red-emitting and green-emitting CuInS2 composite films are realized, resulting in remote ultraviolet-pumped white light-emitting diodes with a high color rendering index of 91. These findings inform new blue-emissive NCs and composite films, potentially paving the way to design new structures of lighting and display devices.

Broadband yellow light emitting performance based on zero-dimensional hybrid lead bromide trimers

2020 ◽  
Vol 44 (48) ◽  
pp. 21146-21151
Author(s):  
Xing-Yu Sun ◽  
Wei-Feng Zhang ◽  
Hong-Mei Pan ◽  
Yue-Yu Ma ◽  
Zhi-Hong Jing
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Quantum Yields ◽  
Yellow Light ◽  
Inorganic Hybrid ◽  
Light Emitting ◽  
Lead Bromide ◽  
White Light Emitting Diodes

Two new zero-dimensional organic–inorganic hybrid lead halides based on linear [Pb3Br12]6− trimers display broadband yellow light emissions with high photoluminescence quantum yields, exhibiting potential in the fabrications of white-light emitting diodes.

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