Abstract
In this work, a simple, rapid, and low-cost sputtering system was used to deposit Ag-Au composite nanoparticles (CNPs) onto an indium titanium oxide (ITO) anode for polymer light-emitting diodes (PLEDs) at room temperature. These Ag-Au CNPs on ITO surface serve as the resonators of electrons to result in a broader absorption under the visible light irradiation. The interlayer does not act as electron blocking layer, but hole injection enhancement by electron injection does seem to occur. Because of the localized surface plasmon resonance emission, the luminance efficiencies of the blue-, green-, and red-emitting PLEDs with Ag-Au CNPs increased by approximately 1.5-fold, compared to those of the reference devices. This method provided with the production of chemically stable Ag-Au CNPs under ambient conditions is well suited for enhancing the emission of large-area PLEDs in full color.
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