Enhancement of electroluminescence in GaN-based light-emitting diodes by metallic nanoparticles

Jun-Ho Sung; Jeong Su Yang; Bo-Soon Kim; Chul-Hyun Choi; Min-Woo Lee; Seung-Gol Lee; Park, Se-Geun; El-Hang Lee; Beom-Hoan O
June 2010
Applied Physics Letters;6/28/2010, Vol. 96 Issue 26, p261105
Academic Journal
The enhanced electroluminescence of GaN-based light-emitting diodes (LEDs) with noble metallic nanoparticles (MNPs) is demonstrated. The sample with well-designed Ag MNPs has shown the best performance enhancement of 126% in electroluminescent intensity compared with a conventional LED sample, even though the MNPs are placed at least 200 nm away from the quantum-well active layer. The MNPs provide enhanced photon scattering and coupling between localized surface plasmon resonance (LSPR) modes and photon modes internally trapped in a device. To investigate this effect, the peculiarities of the LSPR and the corresponding structural properties of the MNPs are discussed through the effective medium approach.


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