Crystal structure, tunable emission and applications of Ca1−xAl1−xSi1+xN3−xOx:RE (x = 0–0.22, RE = Ce3+, Eu2+) solid solution phosphors for white light-emitting diodes

2016 ◽  
Vol 4 (47) ◽  
pp. 11219-11230 ◽  
Author(s):  
Shuxing Li ◽  
Le Wang ◽  
Qiangqiang Zhu ◽  
Daiming Tang ◽  
Xuejian Liu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid Solution ◽  
White Light ◽  
Light Emitting Diodes ◽  
Bandgap Engineering ◽  
Luminous Efficacy ◽  
Light Emitting ◽  
White Light Emitting Diodes ◽  
Tunable Emission

The designed Ca1−xAl1−xSi1+xN3−xOx:Eu2+/Ce3+red or yellow phosphors by structure and bandgap engineering afford wLEDs with high color rendition and luminous efficacy.

scholarly journals Tuning crystal structure and luminescence of Eu2+-activated LiSr1–xBaxPO4 solid solution for white light-emitting diodes

2021 ◽  
Author(s):  
Shuzhen Liao ◽  
Yao Zhang ◽  
Ying Li ◽  
Jilin Zhang ◽  
Zhen Chen ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid Solution ◽  
White Light ◽  
Light Emitting Diodes ◽  
Spectral Tuning ◽  
Light Emitting ◽  
White Light Emitting Diodes

Emission spectral tuning is an important issue for phosphors. Here in we report a Eu2+-activated solid-solution LiSr1-xBaxPO4 based on a recently discovered monoclinic LiSrPO4, which has only one Sr2+ crystallographic...

Coordination Units of Mn2+ Modulation toward Tunable Emission in Zero-Dimensional Bromides for White Light-Emitting Diodes

2022 ◽  
Author(s):  
Guojun Zhou ◽  
Jialiang Ding ◽  
Xing-Xing Jiang ◽  
Jian Zhang ◽  
Maxim Molokeev ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Lead Free ◽  
Metal Halides ◽  
Light Emitting ◽  
High Efficient ◽  
White Light Emitting Diodes ◽  
Multifunctional Platform ◽  
Tunable Emission

Organic-inorganic metal halides have become a multifunctional platform for manipulating photoluminescence due to high-efficient and tunable emissions, especially for lead-free Mn2+-based halides. Herein, the zero-dimensional (0D) bromides of (C5H14N3)2MnBr4 and...

Crystal structure tailoring and luminescence tuning of Sr1−Ba Al2Si2O8:Eu2+ phosphors for white-light-emitting diodes

2019 ◽  
Vol 776 ◽  
pp. 554-559 ◽  
Author(s):  
Baochen Wang ◽  
Ziyao Wang ◽  
Yangai Liu ◽  
Tao Yang ◽  
Zhaohui Huang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
White Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
White Light Emitting Diodes

Efficient and controllable photoluminescence in novel solid solution Ca1−xSrxHf4(PO4)6:Eu2+ phosphors with high thermal stability for white light emitting diodes

CrystEngComm ◽  
2018 ◽  
Vol 20 (31) ◽  
pp. 4383-4394 ◽  
Author(s):  
Shuangyu Xin ◽  
Miao Gao ◽  
Chuang Wang ◽  
Xuejiao Wang ◽  
Ge Zhu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solid Solution ◽  
Quantum Efficiency ◽  
White Light ◽  
Light Emitting Diodes ◽  
High Thermal Stability ◽  
Photoluminescence Properties ◽  
Light Emitting ◽  
White Light Emitting Diodes

The tunable photoluminescence properties of (Ca,Sr)Hf4(PO4)6:Eu2+ solid solution phosphors with high thermal stability and quantum efficiency were investigated.

Modification of the crystal structure of Sr2−xBaxSi(O,N)4: Eu2+ phosphors to improve their luminescence properties

CrystEngComm ◽  
2015 ◽  
Vol 17 (47) ◽  
pp. 9123-9134 ◽  
Author(s):  
Xiaojun Li ◽  
Youjie Hua ◽  
Hongping Ma ◽  
Degang Deng ◽  
Shiqing Xu
Keyword(s):  
Crystal Structure ◽  
White Light ◽  
Light Emitting Diodes ◽  
Luminescence Properties ◽  
Light Emitting ◽  
Red Phosphors ◽  
White Light Emitting Diodes

A series of Sr1.98−xBaxSi(O,N)4: 0.02Eu2+ (0 ≤ x ≤ 0.5) phosphors were synthesized. We anticipate that these materials can be used as green or red phosphors in white light emitting diodes.

scholarly journals Improvement in Luminous Efficacy and Thermal Performance Using Quantum Dots Spherical Shell for White Light Emitting Diodes

Nanomaterials ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 618 ◽  
Author(s):  
Songmao Chen ◽  
Caiman Yan ◽  
Yong Tang ◽  
Jiasheng Li ◽  
Xinrui Ding ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Spherical Shell ◽  
Thermal Performance ◽  
White Light ◽  
Shell Structure ◽  
Light Emitting Diodes ◽  
Planar Structure ◽  
Luminous Efficacy ◽  
Light Emitting ◽  
White Light Emitting Diodes

White light-emitting diodes (WLEDs) based on quantum dots (QDs) are gaining increasing attention due to their excellent color quality. QDs films with planar structure are universally applied in WLEDs for color conversion, while they still face great challenges in high light extraction and thermal stability. In this study, a QDs film with a spherical shell structure was proposed to improve the optical and thermal performance for WLEDs. Compared with the conventional planar structure, the luminous efficacy of the QDs spherical shell structure is improved by 12.9% due to the reduced total reflection effect, and the angular-dependent correlated color temperature deviation is decreased from 2642 to 283 K. Moreover, the highest temperature of the WLED using a QDs spherical shell is 4.8 °C lower than that of the conventional WLED with a planar structure, which is mainly attributed to larger heat dissipation area and separated heat source. Consequently, this QDs spherical shell structure demonstrates superior performance of QDs films for WLEDs applications.

Crystal structure and photoluminescence tuning of novel single-phase Ca8ZnLu(PO4)7:Eu2+,Mn2+ phosphors for near-UV converted white light-emitting diodes

2019 ◽  
Vol 7 (27) ◽  
pp. 8374-8382 ◽  
Author(s):  
Jing Yan ◽  
Ziwang Zhang ◽  
Dawei Wen ◽  
Jianbang Zhou ◽  
Yiqin Xu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
White Light ◽  
Single Phase ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Tunable ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering

A single phase color-tunable white light emitting Ca8ZnLu(PO4)7:Eu2+,Mn2+ phosphor with high color rendering index has been rationally designed via combination of cyan and red emissions.

Standard approach for energy transfer scheme and tunable emission for white light-emitting diodes (W-LEDs)

2016 ◽  
Vol 30 (25) ◽  
pp. 1650179
Author(s):  
S. T. Taide ◽  
N. B. Ingle ◽  
S. K. Omanwar
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Light Emitting Diodes ◽  
Precipitation Method ◽  
Energy Transfer Mechanism ◽  
Efficient Energy Transfer ◽  
Emission Analysis ◽  
Light Emitting ◽  
White Light Emitting Diodes ◽  
Tunable Emission

Rare-earth (RE) activated (Dy[Formula: see text]/Sm[Formula: see text] and Ce[Formula: see text]/Tb[Formula: see text]) polycrystalline CaSO4 phosphors were prepared by co-precipitation method. Powder XRD pattern confirmed their structure and phase, while FE-SEM investigation reflected the particle morphology. The optical absorption and emission analysis were carried out to find efficient energy transfer within codoped phosphors, a possible energy transfer mechanism was discussed and energy transfer efficiencies were calculated. The multicolor emission from these materials suggests sustainable and well-defined approach towards possibility of obtaining tunable emission for producing while light emission, which finds potential applications in field emission display (FED) and white light-emitting diodes (W-LEDs).

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