研究目的
To reduce the influence of surface plasmon polaritons (SPP) and micro-cavity effect between two metal electrodes on the performance of optical light out-coupling of Top-emitting organic light-emitting diode (OLED) and enhance the light extraction efficiency.
研究成果
The TEOLED structure with Ag nanograting anode is able to reduce the SPP mode and waveguide mode of TEOLED devices, and the FDTD simulation predicts that 60% enhancement of light extraction efficiency could be implemented by Ag grating anode on the TEOLED with period at 500 nm. The proposed structure shows good viewing angle properties, promising the commercial application potential of the metallic anode TEOLED.
研究不足
The study focuses on reducing losses caused by the SPP on the anode and the micro-cavity effects, but other factors influencing the performance of TEOLEDs are not addressed.
1：Experimental Design and Method Selection:
The study proposes an electromagnetic model of top-emitting organic light-emitting diode (TEOLED) with metallic grating anode. The simulation is based on the Finite Element method (FEM) and Finite difference time domain (FDTD).
2：Sample Selection and Data Sources:
The models of TEOLED with flat metal film anode and conventional BEOLED are adopted and analyzed as the comparison of metallic grating anode.
3：List of Experimental Equipment and Materials:
The materials include AL/Aluminum 8-hydroxyquinolinate (Alq3), N, N -bis(naphthalene-1-yl)-N, N-bis(phenyl) benzidine (NPB), and Al for the cathode.
4：Experimental Procedures and Operational Workflow:
The FEM methods is applied to show the field distribution of TEOLED with flat Ag film and grating Ag anode respectively, and different period of nanograting is simulated through FDTD to optimize the efficiency of TEOLED.
5：Data Analysis Methods:
The field distribution and transmission spectrum of proposed TEOLED model are analyzed to indicate the ability of metallic grating anode to improve the light extraction efficiency.
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