Corrugated organic light emitting diodes for enhanced light extraction

Photonic crystal electrode to be used in organic LED structures

“…For this reason, a deeper pillar depth with a larger Bragg diffraction effect can be realized and it is possible to obtain a good Bragg reflection effect by combining the two effects in a proper way. By introducing the PE-DOT:PSS layer it is possible to prevent the formation of cracks and sharp edges that can cause leakages current and a drastic efficiency reduction, vanishing the PC effect [27]. Finally, in this way it is not necessary to make further process steps to realize the photonic structure below the anode [28], by obtaining a good jump of refractive index useful for the release of trapped light [13,29] and using a very thin TCO (50-100 nm), which in turn fosters a better optical coupling [30].…”

P-158: Enhanced Efficiency of Organic Light-Emitting Diodes by Inserting Nanosized Dot Pattern by Laser Interference Lithography

“…Reason of higher operating voltage is that dot layer acts like insulator, so partially current does not flow into organic layers. Fig.3 This can be explained by increase of interface area of layers and rise of electric-field intensity [9]. Fig.3.d shows how specific wavelength enhanced through our fabricated device.…”

Enhanced performance of organic light-emitting diodes (OLEDs) and OLED-based photoluminescent sensing platforms by novel microstructures and device architectures

“…To achieve better light extraction, various methods have been utilized, which can be classified into three major categories: (i) Modification of the emitting species, e.g., increasing the population of horizontally oriented emitting dipoles [73]; (ii) Modification of the ITO/substrate structure or interface [14,16,74,75]; (iii) Modification of the substrate/air interface [15,[76][77][78]. Recent studies have also shown that optimizing cavity effects and plasmon modes coupled with reflecting electrodes are also of major importance, affecting the outcoupling efficiency.…”