The formation mechanism, improved photoluminescence and LED applications of red phosphor K2SiF6:Mn4+

2014 ◽  
Vol 2 (20) ◽  
pp. 3879-3884 ◽  
Author(s):  
Lifen Lv ◽  
Xianyu Jiang ◽  
Shaoming Huang ◽  
Xi'an Chen ◽  
Yuexiao Pan
Keyword(s):  
Formation Mechanism ◽  
Manganese Oxides ◽  
Experimental Results ◽  
Red Phosphor ◽  
White Leds ◽  
Luminescence Efficiency

The formation mechanism of red phosphor K2SiF6:Mn4+ free of manganese oxides has been discussed based on detailed experimental results. Significant improvements in the luminescence efficiency make it a good candidate for applications in “warm” white LEDs.

Optimized photoluminescence of red phosphor K2TiF6:Mn4+synthesized at room temperature and its formation mechanism

2015 ◽  
Vol 3 (9) ◽  
pp. 1935-1941 ◽  
Author(s):  
Lifen Lv ◽  
Zhen Chen ◽  
Guokui Liu ◽  
Shaoming Huang ◽  
Yuexiao Pan
Keyword(s):  
Formation Mechanism ◽  
Luminescence Intensity ◽  
Room Temperature ◽  
Synthetic Process ◽  
Red Phosphor ◽  
White Leds ◽  
Red Phosphors ◽  
Color Rendering

The formation mechanism for red phosphors K2TiF6:Mn4+synthesized at room temperature has been discussed. The luminescence intensity has been improved by optimizing the synthetic process. Encapsulation of the red phosphor K2TiF6:Mn4+with YAG:Ce on a GaN layer produces “warm” white LEDs with color rendering 86 at 3251 K.

A novel double-perovskite Gd2ZnTiO6:Mn4+red phosphor for UV-based w-LEDs: structure and luminescence properties

2016 ◽  
Vol 4 (12) ◽  
pp. 2374-2381 ◽  
Author(s):  
Hui Chen ◽  
Hang Lin ◽  
Qingming Huang ◽  
Feng Huang ◽  
Ju Xu ◽  
...  
Keyword(s):  
Double Perovskite ◽  
Luminescence Properties ◽  
Red Phosphor ◽  
White Leds

This work highlights a novel double-perovskite red phosphor Gd2ZnTiO6:Mn4+for UV-based warm white LEDs.

Optimized photoluminescence of red phosphor Na2 SnF6 :Mn4+ as red phosphor in the application in “warm” white LEDs

2017 ◽  
Vol 100 (5) ◽  
pp. 2005-2015 ◽  
Author(s):  
Luqing Xi ◽  
Yuexiao Pan ◽  
Xian Chen ◽  
Shaoming Huang ◽  
Mingmei Wu
Keyword(s):  
Red Phosphor ◽  
White Leds

scholarly journals Spectroscopic investigation of La7Ta3W4O30:Sm3+ orange-red phosphor for white LEDs

2020 ◽  
Vol 13 (6) ◽  
pp. 5581-5592
Author(s):  
Yu Wang ◽  
Bin Deng ◽  
Yuee Ke ◽  
Shuang Shu ◽  
Rixin Liu ◽  
...  
Keyword(s):  
Spectroscopic Investigation ◽  
Red Phosphor ◽  
White Leds

Effects of nano-copper particles on the properties of Sn58Bi composite solder pastes

2017 ◽  
Vol 34 (1) ◽  
pp. 40-44 ◽  
Author(s):  
Hao Zhang ◽  
Yang Liu ◽  
Fenglian Sun ◽  
Gaofang Ban ◽  
Jiajie Fan
Keyword(s):  
Formation Mechanism ◽  
Composite Solder ◽  
Defect Formation ◽  
Void Formation ◽  
Experimental Results ◽  
Solder Paste ◽  
Content Type ◽  
Weight Percentage ◽  
Copper Particles ◽  
Solder Pastes

Purpose This paper aimed to investigate the effects of nano-copper particles on the melting behaviors, wettability and defect formation mechanism of the Sn58Bi composite solder pastes. Design/methodology/approach In this paper, the mechanical stirring method was used to get the nano-composite solder pastes. Findings Experimental results indicated that the addition of 3 wt.% (weight percentage) 50 nm copper particles showed limited effects on the melting behaviors of the Sn58Bi composite solder paste. The spreading rate of the Sn58Bi composite solder paste showed a decreasing trend with the increase of the weight percentage of 50 nm copper particles from 0 to 3 wt.%. With the addition of copper particles of diameters 50 nm, 500 nm or 6.5 μm into the Sn58Bi solder paste, the porosities of the three types of solder pastes showed a similar trend. The porosity increased with the increase of the weight percentage of copper particles. Based on the experimental results, a model of the void formation mechanism was proposed. During reflow, the copper particles reacted with Sn in the matrix and formed intermetallic compounds, which gathered around the voids produced by the volatilization of flux. The exclusion of the voids was suppressed and eventually led to the formation of defects. Originality/value This study provides an optimized material for the second and third level packaging. A model of the void formation mechanism was proposed.

Novel polygonal structure Mn4+ activated In3+-based Elpasolite-type hexafluorides red phosphor for warm white light-emitting diodes (WLEDs)

2019 ◽  
Vol 48 (4) ◽  
pp. 1376-1385 ◽  
Author(s):  
Feng Hong ◽  
Haiming Cheng ◽  
Chao Song ◽  
Guixia Liu ◽  
Wensheng Yu ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Synthetic Methods ◽  
Red Phosphor ◽  
Light Emitting ◽  
White Leds ◽  
Red Phosphors ◽  
Polygonal Structure ◽  
Warm White Light ◽  
White Light Emitting Diodes

Red phosphors (NH4)2NaInF6:Mn4+ with controllable morphology were synthesized via different synthetic methods, which can be fabricated for warm white LEDs.

scholarly journals Facile synthesis of the desired red phosphor Li 2 Ca 2 Mg 2 Si 2 N 6 :Eu 2+ for high CRI white LEDs and plant growth LED device

2019 ◽  
Vol 103 (3) ◽  
pp. 1773-1781 ◽  
Author(s):  
Xian Yang ◽  
Yu Zhang ◽  
Xuejie Zhang ◽  
Jian Chen ◽  
Haisen Huang ◽  
...  
Keyword(s):  
Plant Growth ◽  
Facile Synthesis ◽  
Red Phosphor ◽  
White Leds
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