White-light-emitting flexible display devices based on double network hydrogels crosslinked by YAG:Ce phosphors

2020 ◽  
Vol 8 (1) ◽  
pp. 247-252 ◽  
Author(s):  
Yawen Xu ◽  
Jing Chen ◽  
Hua Zhang ◽  
Hua Wei ◽  
Linjie Zhou ◽  
...  
Keyword(s):  
White Light ◽  
Flexible Display ◽  
Light Emitting ◽  
Double Network ◽  
Display Devices

Stretchable and tough double network hydrogels with YAG:Ce phosphors as crosslinkers are synthesized for flexible white-light-emitting display devices.

scholarly journals Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide

2019 ◽  
Vol 10 ◽  
pp. 760-770 ◽  
Author(s):  
Jeff L Nyalosaso ◽  
Rachod Boonsin ◽  
Pierre Vialat ◽  
Damien Boyer ◽  
Geneviève Chadeyron ◽  
...  
Keyword(s):  
White Light ◽  
Fluorescent Dyes ◽  
Light Emission ◽  
Organic Dyes ◽  
Light Emitting Diode ◽  
Composite Films ◽  
Visible Spectrum ◽  
Light Emitting ◽  
Blue Led ◽  
Display Devices

A new luminescent composite film resulting from the dispersion of luminescent organic dyes in a single-layered hydroxide (SLH)-type inorganic matrix has been developed. Two fluorescent organic dyes emitting visible light upon blue LED excitation were investigated in this study: dicyanomethylene (DCM) and pyranine (HPTS). These dyes exhibit broad emission bands that cover a large part of the visible spectrum. The concept developed in our work consisted in keeping SLH in its wet form to ensure a good dispersion of the fluorescent dyes prior to immobilizing the hybrid materials in a silicone polymer to achieve luminescent composite films. We demonstrate that these coatings stacked upon each other and placed above a blue LED lead to white-light emission with suitable photometric parameters for applications in lighting or display devices: colour temperature of 5409 K and colour rendering index (CRI) of 81.

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