Title :
Utilizing Two-Dimensional Photonic Crystals in Different Arrangement to Investigate the Correlation Between the Air Duty Cycle and the Light Extraction Enhancement of InGaN-Based Light-Emitting Diodes
Author :
Ming-Lun Lee ; Yao-Hong You ; Ray-Ming Lin ; Cheng-Ju Hsieh ; Vin-Cent Su ; Po-Hsun Chen ; Chieh-Hsiung Kuan
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
This paper demonstrates that the optimal light extraction enhancement of the 2-D photonic crystals (PhCs) light-emitting diodes (LEDs) among different air duty cycles (ADADCsCs) is independent of the geometry and the shape of the 2-D PhCs. Moreover, it also discusses that the side-directional emission property of the 2-D PhCs LEDs in hexagonal lattice arrangement (HLA) is better than that in square lattice arrangement (SLA). Finally, the light output power of the 2-D PhCs LEDs in SLA and in HLA with the ADC of 51% are significantly improved by 60.4% and 81.9%, respectively, as compared with the reference LED at an injection current of 350 mA.
Keywords :
III-V semiconductors; gallium compounds; indium compounds; light emitting diodes; optical materials; photonic crystals; wide band gap semiconductors; ADC; InGaN; InGaN-based light-emitting diodes; LED; air duty cycle; current 350 mA; hexagonal lattice arrangement; injection current; lattice arrangement; light extraction enhancement; optimal light extraction enhancement; two-dimensional photonic crystals; Correlation; Gallium nitride; Lattices; Light emitting diodes; Measurement by laser beam; Optical variables measurement; Semiconductor device measurement; Light-emitting diodes (LEDs); photonic crystals (PhCs);
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2014.2323304
