Studies On Applications Of Organic Optoelectronic Devices Based On Metal Nanoparticles Optical Regulate

Nowadays, electroluminescent devices based on organic materials are ofconsiderable concern owing to their attractive characteristics and potential applicationsto flat-panel displays and optoelectronic field hinge on their desirable advantages ofsimple fabrication process, long lifetime, widely view angle, low consumption,flexibility and so on. In this essay, we have demonstrated a new approach to stand upfor the light extraction enhancement in organic light-emitting diodes (OLEDs) byintroducing platinum–cobalt (Pt3Co) alloy nanoparticles (ANPs). The relevant processtends to be divided into the following three aspects in detail:First of all, systematic study on the devices with and without unannealed Pt3CoANPs compared with traditional materials illustrates that the efficiency with an upwardtrend is mainly thanks to the resonance of localized surface plasmon (LSP).Moreover, the current efficiencies peaked at19.2cd/A and29.3cd/A at a currentdensity of20mA/cm2, which are obtained for the device with Pt3Co ANPs unannealedand annealed, respectively. In contrast, they correspond to about46%and123%enhancement compared to the conventional device without Pt3Co ANPs. In addition，wecertainly improve the overall performance.Finally, the analysis of surface topography, angular-dependent EL spectra andtheoretical calculations of the devices with and without annealed Pt3Co ANPs revealsthat the annealing treatment of Pt3Co ANPs could result in a further enhancement inlight extraction dependent on the increased light scattering effect essentially.The highlights of this thesis reported are shown as followed:1. By using chemically synthetized Pt3Co ANPs, we effectively extract the light out-coupling and energy of surface plasmons.2. We have achieved a double-enhancement in light extraction by simultaneouslyrealizing the resonance of LSP and the light scattering effect comprehensively.3. Magnetic field effect on the OLEDs employing the Pt3Co ANPs presents anefficient pathway to boost the EL efficiency of the fluorescent OLEDs.4. In order to acquire a deep understanding of the increase mechanism, we have runFinite Difference Time Domain (FDTD) simulations theoretically.Eventually, this work is expected to put forward a new look at the benefit of ANPsfor applications in the construction of advanced electronic devices and focus on makingfull use of collective of nano-materials obviously. Only by this way, can we anticipate abetter and brighter future.