2018
DOI: 10.1002/adom.201701244
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Enhanced Light Extraction from OLEDs Fabricated on Patterned Plastic Substrates

Abstract: A key scientific and technological challenge in organic light-emitting diodes (OLEDs) is enhancing the light outcoupling factor η out , which is typically <20%. This paper reports experimental and modeling results of a promising approach to strongly increase η out by fabricating OLEDs on novel flexible nanopatterned substrates that result in a >2× enhancement in green phosphorescent OLEDs (PhOLEDs) fabricated on corrugated polycarbonate (PC). The external quantum efficiency (EQE) reaches 50% (meaning η out ≥50… Show more

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Cited by 33 publications
(49 citation statements)
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(68 reference statements)
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“…The response time can be extremely short and the power consumption can be considerably reduced relative to that of inorganic light-emitting devices. Contrarily to inorganic diodes that can only fabricated on rigid substrates (i.e., glass), OLEDs can be prepared on flexible substrates, such as polymers and the resulting devices can thus be light-weight [6][7][8]. Fully flexible OLEDs can also be elaborated using solution-processing methods, thus becoming particularly promising, owing to large-area low-cost fabrication potential and compatibility with flexible plastic substrates.…”
Section: Introductionmentioning
confidence: 99%
“…The response time can be extremely short and the power consumption can be considerably reduced relative to that of inorganic light-emitting devices. Contrarily to inorganic diodes that can only fabricated on rigid substrates (i.e., glass), OLEDs can be prepared on flexible substrates, such as polymers and the resulting devices can thus be light-weight [6][7][8]. Fully flexible OLEDs can also be elaborated using solution-processing methods, thus becoming particularly promising, owing to large-area low-cost fabrication potential and compatibility with flexible plastic substrates.…”
Section: Introductionmentioning
confidence: 99%
“…The CsPbBr 3 NPs LED is fabricated with the device structure of ITO/NiO x /PVK/CsPbBr 3 NPs/1,3,5‐tris(1‐phenyl‐1 H ‐benzo[d]imidazol‐2‐yl)benzene (TPBi)/LiF/Al, in which NiO x is chosen as hole injection layer (HIL) to replace the traditional hole injection material PEDOT:PSS due to the higher stability and conductivity . The transmittance of NiO x films with different annealing temperature at the wavelength of 350–700 nm is shown in Figure S7a (Supporting Information), and the transmittance at 510–520 nm for annealing temperature of 350 °C is the highest, which ensures higher light out‐coupling efficiency . Besides, the XRD of NiO x films with different annealing temperature (Figure S7b, Supporting Information) indicates the better crystallization as the temperature is at 350 °C.…”
Section: Resultsmentioning
confidence: 99%
“…As predicted theoretically, an OLED can achieve internal efficiency up to 100% by utilizing different techniques. However, only 20% external quantum efficiency (EQE) can be achieved due to its light loss at waveguide mode, electrode absorption, and, most importantly, the SP at the metal junction …”
Section: Mechanism Of Plasmonic‐assisted Devicesmentioning
confidence: 99%