Flexible Quantum-Dot Light-Emitting Diodes Using Embedded Silver Mesh Transparent Electrodes Manufactured By An Ultraprecise Deposition Method
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A first design is finished, a complete explanation of the targeted functionality is included, and the targeted printer technology has been provided. This AME design also provides a model which is proven to fulfill the targeted functionality. Furthermore, the AME structure has been printed and validated by measurements. A complete set of the measurement setup and results is provided. This AME design is part of a system that has reached product level and has passed a specified set of environmental tests. The specifications of the performed tests and the results are provided.
Flexible substrates with transparent conductive electrodes (TCEs) are essential components of organic-light-emitting diodes (OLEDs). However, Indium tin oxide (ITO), the prevailing transparent and conductive electrode material, is ill-suited for flexible devices due to its brittleness.
Łukasz Witczak, Mateusz Łysień, Artur Podhorodecki, Piotr Sitarek & Maciej Chrzanowski introduced a new method for producing flexible, transparent, and conductive electrodes for optoelectronic purposes using a silver metal mesh and ultraprecise deposition (UPD) technique.
Fabricated mesh exhibits:
🟢 an 80% (λ = 550 nm) optical transmittance
🟢 a sheet resistance of 11 Ω/sq.
To evaluate its performance, the polymer-embedded Ag-mesh is utilized as an anode in a quantum-dot light-emitting diode (QLED). The fabricated QLED is characterized by:
🟢 the maximum external quantum efficiency (EQE) of 2%
🟢 a current efficiency (CE) of 6 cd/A,
🟢 reaching the maximum luminance (L) of 3200 cd/m2 at a current density of 100 mA/cm2.
This method offers a convenient and fast way to create optoelectronic devices, without the need for any specialized equipment or complicated treatments.
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