Abstract
We fabricated Ag nanoparticle (NP) film in organic light emission diodes (OLEDs), and a 23 times increase in electroluminescence (EL) at 518 nm was probed by time-resolved EL measurement. The luminance and relative external quantum efficiency (REQE) were increased by 5.4 and 3.7 times, respectively. There comes a new energy transport way that localized surface plasmons (LSPs) would absorb energy that corresponds to the electron-hole pair before recombination, promoting the formation of electron-hole pair and exciting local surface plasmon resonance (LSPR). The extended lifetime of Alq3 indicates the existence of strong interaction between LSPR and exciton, which decreases the nonradiative decay rate of OLEDs.
Highlights
Organic light emission diodes (OLEDs) have been widely used in TV, mobile phone, and lighting source because of their unique advantages such as flexibility, high brightness, low power consumption, and wide view [1,2,3]
Because the absorption spectra of Ag NP film overlap with the emission light, there would be a strong interaction between the exciton and localized surface plasmon resonance (LSPR)
In summary, we have demonstrated the enhancement of OLEDs by inserting the Ag NP film
Summary
Organic light emission diodes (OLEDs) have been widely used in TV, mobile phone, and lighting source because of their unique advantages such as flexibility, high brightness, low power consumption, and wide view [1,2,3]. Nearly 100 % of inner quantum efficiency can be obtained using phosphorescence [8, 9] and delayed fluorescence [10,11,12,13] materials. The delayed fluorescence depends heavily on the depositing conditions and the quantum efficiency is usually much lower than 100 %. In order to design OLEDs with better performance, the quantum efficiency of fluorescence needs to improve by using new technology and theory. Surface plasmon resonance (SPR) [14,15,16,17,18] and localized surface plasmon resonance (LSPR) [19,20,21,22] associated with metal film and nanoparticles (NPs) have become the most attractive methods to enhance electroluminescence (EL) of OLEDs. The enhanced factor for photoluminescence (PL) can reach to as high as 1010 theoretically
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
