2009
DOI: 10.1007/s00339-009-5199-x
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Enhanced luminance of organic light-emitting diodes with metal nanoparticle electron injection layer

Abstract: Improvement of the performance of organic lightemitting diodes (OLEDs) was achieved by implementing Magnesium-Nickel nanoparticles at the cathode-organic interface using pulsed laser deposition technique. The small geometry of Mg-Ni nanoparticles acts to enhance the localized electric field around them, thus increasing electron injection through tunneling, from the cathode to the organic layer. Improved current and luminance characteristics were demonstrated for both small molecule and polymer-based OLEDs when… Show more

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Cited by 22 publications
(10 citation statements)
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“…Light emitting diodes (LEDs) and photovoltaic cells may exploit optical and plasmonic functionalities of metal nanoparticles (NPs). [1][2][3] Field effect transistors (FETs) and non-volatile memory elements could employ NPs as charge storage centers, where depending on their charge state, the conductivity of the hybrid material may be modified by several orders of magnitude, allowing the devices to manifest a bistable electrical behavior. [4][5][6] The metal NP charge state change is usually achieved by driving an appropriate current through the device.…”
mentioning
confidence: 99%
“…Light emitting diodes (LEDs) and photovoltaic cells may exploit optical and plasmonic functionalities of metal nanoparticles (NPs). [1][2][3] Field effect transistors (FETs) and non-volatile memory elements could employ NPs as charge storage centers, where depending on their charge state, the conductivity of the hybrid material may be modified by several orders of magnitude, allowing the devices to manifest a bistable electrical behavior. [4][5][6] The metal NP charge state change is usually achieved by driving an appropriate current through the device.…”
mentioning
confidence: 99%
“…Consequently, 0.5 nm was selected as an optimum thickness for UTSL, since it increased luminous efficiency, lowered the driving voltage and improved the brightness and EQE. The J-V characteristics of the PLEDs showed improved current density when the UTSL was incorporated, which is a result of an improved electron injection from the cathode due to the amplified electric field by LRE [47,48]. LRE provides a direct and fast path for electron transport.…”
Section: Resultsmentioning
confidence: 98%
“…5). For carrier-limited materials, the quantum efficiency could be enhanced by inserting a layer that effectually transport electrons from the cathode and so this will improve the performance of optoelectronic devices [39][40][41][42][43][44][45][46][47][48][49][50].…”
Section: Resultsmentioning
confidence: 99%
“…Since the thickness of the Alq 3 layer is 60 nm and the luminescence layer thickness is around 10 nm, the non-luminescent Alq 3 layer together with the BCP layer serves as a spacer under this device. The J-V characteristics of the OLEDs show dramatically improved current density when the gold NPs are incorporated, which may result from improved electron injection from the cathode due to amplified electric field by the surface plasmon of gold NPs, 17 socalled lightning-rod effect. 12 Voltage-luminescence curves of the diodes are shown in Figure 5.…”
Section: Experimental Partmentioning
confidence: 99%