scholarly journals Enhancement of light extraction efficiency of OLEDs using Si_3N_4-based optical scattering layer

2014 ◽  
Vol 22 (10) ◽  
pp. 12392 ◽  
Author(s):  
Sang-Jun Park ◽  
Yang Doo Kim ◽  
Ho Won Lee ◽  
Hyung Jin Yang ◽  
Joong-Yeon Cho ◽  
...  
Keyword(s):  
Extraction Efficiency ◽  
Optical Scattering ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Scattering Layer

scholarly journals FDTD analysis of the light extraction efficiency of OLEDs with a random scattering layer

2014 ◽  
Vol 22 (1) ◽  
pp. 498 ◽  
Author(s):  
Jun-Whee Kim ◽  
Ji-Hyang Jang ◽  
Min-Cheol Oh ◽  
Jin-Wook Shin ◽  
Doo-Hee Cho ◽  
...  
Keyword(s):  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Scattering Layer

Nanoparticle-loaded encapsulation materials for light-emitting diode applications

2006 ◽  
Vol 955 ◽  
Author(s):  
Frank Wilhelm Mont ◽  
H. Luo ◽  
M. F. Schubert ◽  
J. K. Kim ◽  
E. F. Schubert ◽  
...  
Keyword(s):  
Extraction Efficiency ◽  
Light Emitting Diode ◽  
Scattering Length ◽  
Three Dimensional ◽  
Average Diameter ◽  
Optical Scattering ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Light Emitting ◽  
Uniform Dispersion

ABSTRACTNanoparticle-loaded encapsulants provide unique optical and material properties for the enhancement of light extraction efficiency in light-emitting diodes (LEDs). We report on the uniform dispersion of TiO2 nanoparticles with average diameter of 40 nm in epoxy, and the demonstration of a refractive index (n)of 1.68 at 400 nm wavelength, higher than that of pure epoxy (n = 1.53). It is found that proper chemical surfactants and nanoparticle preparation are critical to eliminate agglomeration of nanoparticles. Theoretical analysis of optical scattering in nanoparticle-loaded encapsulation materials reveals that although the size and loading factor of nanoparticles greatly influence scattering, specular transparency of the encapsulant film occurs if the thicknesses of the films are kept below the optical scattering length. Furthermore, the encapsulants benefit from an optimized scattering coefficient as demonstrated by three-dimensional ray-tracing simulations showing light extraction efficiency enhancements greater than 50%.

ZnO Nano-arrays on High Power Blue LED Chip for Enhanced Light Extraction Efficiency

2012 ◽  
Vol 27 (7) ◽  
pp. 716-720
Author(s):  
Bing XU ◽  
Jun-Liang ZHAO ◽  
Jian-Ming ZHANG ◽  
Xiao-Wei SUN ◽  
Fu-Wei ZHUGE ◽  
...  
Keyword(s):  
High Power ◽  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Blue Led
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