The hottest screen printing compound can greatly i

Printing compound can greatly improve the luminous efficiency of OLED

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core tip: German researchers found that white OLED with printing scattering layer can achieve 57lm/w (102cd/a) performance at 2000cd/m2 brightness, Significantly improve the luminous efficiency by 56%. Researchers from karlsruhr Institute of technology in Germany and Heidelberg innovationlab joined hands with OSRAM and found a cost-effective way to improve the luminous efficiency of organic light emitting diodes (OLEDs) by increasing the capture of light

[China Packaging News] German researchers found that the white OLED using the plate printing scattering layer can achieve the performance of 57lm/w (102cd/a) at the brightness of 2000cd/m2, significantly improving the luminous efficiency by 56...

researchers from the Karlsruhe Institute of technology; kit in Germany and Heidelberg innovationlab joined hands with OSRAM OLED GmbH, and found a cost-effective method, The luminous efficiency of organic light emitting diodes (OLEDs) can be improved by increasing the capture of light

this study was published in ACS photonics. The researchers described this method in detail in an article entitled "large area screen printed internal extraction layers for organic light emitting diodes"

researchers printed a series of high refractive index titanium dioxide (TiO2) nanoparticles in the form of plate printing. Before the glass substrate received the complete OLED stack, it was embedded in the multi-component polymer. There was also a correlation between the thrust and delamination during the moment cutting process. This is simpler than using complex multi cycle shutter or random disorder structure. The composition of plate printing is suitable for high-throughput roll to roll (R2R) process, and it is very easy to expand for large area OLED panels

white light OLED does not use lithography (above) and any problems within the warranty period. The light capture layer of lithography (below)

"low light level capture (from OLED) comes from the generated photon coupling substrate, waveguide, surface plasmon polariton mode and subsequent transmission and absorption," while the additional layer effectively couples the propagation of photons in the internal mode. The composite layer is only 10 μ M thick, 8.82% of the weight (diameter 21mm) of TiO2 nanoparticles. It can be used as a volumetric light scattering medium, which improves the luminous efficiency of white OLED by 56%, and has spectral and angle invariance

researchers at 15 × On a 15cm2 substrate, 5 × 5 array 13.4 × With the help of training channels such as provincial entrepreneur training and foreign training of the Provincial Bureau of foreign experts 4mm2 white OLED, and micro display for reference design components without internal retrieval layer (IEL)

although the efficiency of this reference component without internal capture layer is about 35lm/w (68cd/a), the white OLED with printing scattering layer can achieve the efficiency performance of 57lm/w (102cd/a) at the brightness of 2000cd/m2. In terms of cd/a and lm/w, it is equivalent to an increase of 56% efficiency, which shows that this approach has achieved effective waveguide substrate mode coupling

the scattering layer can also achieve better angular stability of the emission spectrum without causing any electrical defects