Numerical Analysis of Light Extraction Efficiency of a Core-shell Nanorod Light-emitting Diode
- Resource Type
- Article
- Authors
- 김광석; 주기준; 김영현
- Source
- Current Optics and Photonics, 7(5), pp.496-503 Oct, 2023
- Subject
- 물리학
- Language
- English
- ISSN
- 2508-7274
2508-7266
We present a detailed analysis of the light extraction efficiency (LEE) of a core-shell nanorod light emitting diode (LED) using finite-difference time-domain (FDTD) simulations. We found that the LEE has a deep dependence on source positions and polarization directions based on the calculated LEE results for every x and z position inside the core-shell nanorod structure. The LEEs are different for the upper part (pyramid) and the lower part (sidewall) of the core-shell nanorod owing to total internal reflection (TIR) and the generated optical modes in the structure. As a result, the LEE of sidewall is much larger than that of pyramid. The averaged LEE of the core-shell nanorod LED is also investigated with variable p-GaN thickness, n-GaN thickness, and height for the design guidelines for the optimized LEE of core-shell nanorod LEDs.