Ultra-high color rendering warm-white light-emitting diodes based on an efficient green-emitting garnet phosphor for solid-state lighting

2021 ◽  
Vol 405 ◽  
pp. 126950 ◽  
Author(s):  
Xiaoyong Huang ◽  
Jia Liang ◽  
Sami Rtimi ◽  
Balaji Devakumar ◽  
Zongjie Zhang
Keyword(s):  
Solid State ◽  
White Light ◽  
Light Emitting Diodes ◽  
Solid State Lighting ◽  
Light Emitting ◽  
Warm White Light ◽  
White Light Emitting Diodes ◽  
Color Rendering

scholarly journals Color Rendering Index Thermal Stability Improvement of Glass-Based Phosphor-Converted White Light-Emitting Diodes for Solid-State Lighting

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Chun-Chin Tsai
Keyword(s):  
Thermal Stability ◽  
Solid State ◽  
White Light ◽  
Light Emitting Diodes ◽  
Solid State Lighting ◽  
Light Emitting ◽  
Warm White Light ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering

High color rendering index performance has been required for phosphor-converted warm-white light-emitting diodes (PC-WWLEDs) in lighting industry. The characteristics of low-temperature fabricated phosphor (yellow: Ce3+:YAG, green: Tb3+:YAG, and red: CaAlClSiN3:Eu2+) doped glass were presented for applications to high color rendering index warm-white-light-emitting diodes. Color coordinates (x, y) = (0.36, 0.29), quantum yield (QY) = 55.6%, color rending index (CRI) = 85.3, and correlated color temperature (CCT) = 3923 K were characterized. Glass-based PC-WWLEDs was found able to maintain good thermal stability for long-time high-temperature operation. QY decay, CRI remenance, and chromaticity shift were also analyzed for glass- and silicone-based high-power PC-WLEDs by thermal aging at 150°C and 250°C for industrial test standard’s aging time 1008 hours. Better than the silicone’s, thermal stability of glass-based PC-WLEDs has been improved. The resulted high color rendering index (CRI) glass phosphor potentially can be used as a phosphor layer for high-performance and low-cost PC-WLEDs used in next-generation indoor solid-state lighting applications.

Novel Mn4+-activated layered oxide-fluoride perovskite-type KNaMoO2F4 red phosphor for wide gamut warm white light-emitting diodes backlight

2021 ◽  
Author(s):  
Jiao Wu ◽  
Bo Wang ◽  
Zhiyuan Liu ◽  
Kang Zhang ◽  
Xiaoshuang Li ◽  
...  
Keyword(s):  
Solid State ◽  
White Light ◽  
Light Emitting Diodes ◽  
Solid State Lighting ◽  
Red Phosphor ◽  
Red Emission ◽  
Light Emitting ◽  
Warm White Light ◽  
White Light Emitting Diodes ◽  
Perovskite Type

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,...

Promotion of solid-state lighting for ZnCdSe quantum dot modified-YAG-based white light-emitting diodes

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 51989-51996 ◽  
Author(s):  
Shu-Ru Chung ◽  
Sheng-Shiun Chen ◽  
Kuan-Wen Wang ◽  
Cyuan-Bin Siao
Keyword(s):  
Solid State ◽  
Quantum Dot ◽  
White Light ◽  
Light Emitting Diodes ◽  
Solid State Lighting ◽  
Light Emitting ◽  
Photoluminescence Quantum Yield ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering

In this study, the effect of quantum dot (QD) addition and photoluminescence quantum yield (PL QY) of QDs on the luminous efficacy and color rendering index (CRI) of white light-emitting diodes (LEDs) has been investigated.

53% Efficient Red Emissive Carbon Quantum Dots for High Color Rendering and Stable Warm White‐Light‐Emitting Diodes

2017 ◽  
Vol 29 (37) ◽  
pp. 1702910 ◽  
Author(s):  
Zifei Wang ◽  
Fanglong Yuan ◽  
Xiaohong Li ◽  
Yunchao Li ◽  
Haizheng Zhong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Carbon Quantum Dots ◽  
Light Emitting ◽  
Warm White Light ◽  
White Light Emitting Diodes ◽  
Color Rendering

Bandgap trimming and optical properties of Si3N4:Al microbelt phosphors for warm white light-emitting diodes

CrystEngComm ◽  
2019 ◽  
Vol 21 (43) ◽  
pp. 6566-6573
Author(s):  
Dongyi Shen ◽  
Yiran Shao ◽  
Yingchun Zhu
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
White Light ◽  
Light Emitting Diodes ◽  
Bandgap Energy ◽  
Light Emitting ◽  
Warm White Light ◽  
Yellow Orange ◽  
White Light Emitting Diodes ◽  
Blue Chip

The bandgap energy of Si3N4:Al is precisely and gradually tailored from 2.58 to 2.85 eV by increasing the Al concentration. Si3N4:Al:Eu phosphors exhibiting a yellow-orange emission are promising for solid-state warm white lighting under blue chip excitation.

Red Phosphor Rb2NbOF5:Mn4+ for Warm White Light-Emitting Diodes with a High Color-Rendering Index

2018 ◽  
Vol 58 (1) ◽  
pp. 456-461 ◽  
Author(s):  
Zhengliang Wang ◽  
Zhiyu Yang ◽  
Zhaofeng Yang ◽  
Qianwen Wei ◽  
Qiang Zhou ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Red Phosphor ◽  
Light Emitting ◽  
Warm White Light ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering

High-Efficiency Tris(8-hydroxyquinoline)aluminum (Alq3) Complexes for Organic White-Light-Emitting Diodes and Solid-State Lighting

2011 ◽  
Vol 17 (33) ◽  
pp. 9076-9082 ◽  
Author(s):  
César Pérez-Bolívar ◽  
Shin-ya Takizawa ◽  
Go Nishimura ◽  
Victor A. Montes ◽  
Pavel Anzenbacher
Keyword(s):  
Solid State ◽  
White Light ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Solid State Lighting ◽  
Light Emitting ◽  
White Light Emitting Diodes
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