Silica-encapsulated semiconductor polymer dots as stable phosphors for white light-emitting diodes

2015 ◽  
Vol 3 (28) ◽  
pp. 7281-7285 ◽  
Author(s):  
Kaiwen Chang ◽  
Xiaoju Men ◽  
Haobin Chen ◽  
Zhihe Liu ◽  
Shengyan Yin ◽  
...  
Keyword(s):  
Thermal Stability ◽  
White Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Polymer Dots ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering ◽  
Thermal Stability Of

Semiconductor polymer dots were encapsulated into a SiO2matrix to form highly fluorescent nanocomposites. The photostability and thermal stability of nanocomposites were greatly improved, making them promising candidates for white-light emitting devices with a high color-rendering index.

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.

White light-emitting diodes of high color rendering index with polymer dot phosphors

RSC Advances ◽  
2016 ◽  
Vol 6 (108) ◽  
pp. 106225-106229 ◽  
Author(s):  
Cheng Ruan ◽  
Xue Bai ◽  
Chun Sun ◽  
Haobin Chen ◽  
Changfeng Wu ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Luminous Efficacy ◽  
Light Emitting ◽  
Polymer Dots ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering

WLEDs were fabricated with commendable color rendering index, widely variable color temperatures and high luminous efficacy by combining green and red emitting polymer dots on YAG:Ce-based WLEDs.

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