A Two-dimensional Numerical Simulation of Organic Light-Emitting Devices
نویسندگان
چکیده
In this paper, we employ a two-dimensional numerical model to simulate and explore the electrical characteristics of organic light-emitting devices (OLEDs). The spatial distributions of charge and electric field are investigated for structure design of OLEDs. The two-dimensional numerical simulation of the current continuity and Poisson equations are carefully extended to treat the interfaces of multilayer OLED structure. To hand the interface property of the realistic OLED structure, traps are introduced in this simulation. A lower Schottky barrier height will increase both the current density and radioactive recombination rate. The effect of the trap density saturates around 10 12 cm -2 ; therefore, such high trap density is not preferred in OLED fabrication.
منابع مشابه
Influences of Device Architectures on Characteristics of Organic Light-Emitting Devices Incorporating Ambipolar Blue-Emitting Ter(9,9-diarylfluorenes)
In this article, we report the studies of various device architectures of organic lightemitting devices (OLEDs) incorporating highly efficient blue-emitting and ambipolar carriertransport ter(9,9-diarylfluorene)s, and their influences on device characteristics. The device structures investigated include single-layer devices and multilayer heterostructure devices employing the terfluorene as one...
متن کاملThin-film Encapsulation of Organic Light-Emitting Diodes Using Single and Multilayer Structures of MgF2, YF3 and ZnS
In this research, the lifetime of green organic light emitting diodes (OLEDs) is studied using four passivation layers. To encapsulate the OLEDs, MgF2, YF3, composed of alternating MgF2/ZnS and YF3/ZnS layers were grown by thermal vacuum deposition. Measurements show that the device lifetime is significantly improved by using YF3 and ZnS as passivation layers. However, diodes encapsulated by Mg...
متن کاملOptimized efficiency and angular emission characteristics of white top-emitting organic electroluminescent diodes
The concept of an additional capping layer, which is deposited onto the semitransparent top contact, is applied to minimize microcavity effects for white light emission from top-emitting organic light emitting devices OLEDs . The influence on the optical properties of such devices with silver as top electrode material is discussed using an analytical method and numerical simulations. The result...
متن کاملNumerical Analysis Using Finite Element Method On Phosphorescent Organic Light Emitting Diodes
In this paper, we report our numerical simulation on the electronic-optical properties of the phosphorescent organic light emitting diodes (PHOLEDs) devices. In order to calculate the electrical and optical characteristics such as the transport behavior of carriers, recombination kinetics, and emission property, we undertake the finite element method (FEM). Our model includes Poisson’s equation...
متن کاملThe Effect of Antenna Movement and Material Properties on Electromagnetically Induced Transparency in a Two-Dimensional Metamaterials
Increasing development of nano-technology in optics and photonics by using modern methods of light control in waveguide devices and requiring miniaturization and electromagnetic devices such as antennas, transmission and storage as well as improvement in the electromagnetic tool, have led researchers to use the phenomenon of electromagnetically induced transparency (EIT) and similar phenomena i...
متن کامل