標題: Enhanced external quantum efficiency in GaN-based vertical-type light-emitting diodes by localized surface plasmons
作者: Yao, Yung-Chi
Hwang, Jung-Min
Yang, Zu-Po
Haung, Jing-Yu
Lin, Chia-Ching
Shen, Wei-Chen
Chou, Chun-Yang
Wang, Mei-Tan
Huang, Chun-Ying
Chen, Ching-Yu
Tsai, Meng-Tsan
Lin, Tzu-Neng
Shen, Ji-Lin
Lee, Ya-Ju
光電系統研究所
Institute of Photonic System
公開日期: 3-Mar-2016
摘要: Enhancement of the external quantum efficiency of a GaN-based vertical-type light emitting diode (VLED) through the coupling of localized surface plasmon (LSP) resonance with the wave-guided mode light is studied. To achieve this experimentally, Ag nanoparticles (NPs), as the LSP resonant source, are drop-casted on the most top layer of waveguide channel, which is composed of hydrothermally synthesized ZnO nanorods capped on the top of GaN-based VLED. Enhanced light-output power and external quantum efficiency are observed, and the amount of enhancement remains steady with the increase of the injected currents. To understand the observations theoretically, the absorption spectra and the electric field distributions of the VLED with and without Ag NPs decorated on ZnO NRs are determined using the finite-difference time-domain (FDTD) method. The results prove that the observation of enhancement of the external quantum efficiency can be attributed to the creation of an extra escape channel for trapped light due to the coupling of the LSP with wave-guided mode light, by which the energy of wave-guided mode light can be transferred to the efficient light scattering center of the LSP.
URI: http://dx.doi.org/10.1038/srep22659
http://hdl.handle.net/11536/134013
ISSN: 2045-2322
DOI: 10.1038/srep22659
期刊: SCIENTIFIC REPORTS
Volume: 6
起始頁: 0
結束頁: 0
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