Title :
Utilizing two dimensional photonic crystals to study the relation between the air duty cycle and the light extraction efficiency of InGaN-based Light-Emitting Diodes
Author :
Ming-Lun Lee ; Cheng-Ju Hsieh ; Su, Vincent ; Yao-Hong You ; Po-Hsun Chen ; Hung-Chou Lin ; Han-Bo Yang ; Chieh-Hsiung Kuan
Author_Institution :
Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
In this paper, we have fabricated two-dimensional (2-D) photonic crystals (PhCs) in order to obtain the high light extraction efficiency of InGaN-based Light Emitting Diodes (LEDs) and then we used front-side illuminated micro-photoluminescence (μ-PL) spectroscopy to measure the PL intensity of our InGaN-based LEDs, we also used back-side illuminated inverted microscopy to double check our PL intensity results. From the PL intensity results, not only a nearly threefold increase in the PL intensity was observed, but also that the light output intensity has the air duty cycle dependent characteristic was demonstrated.
Keywords :
III-V semiconductors; gallium compounds; indium compounds; optical microscopy; photoluminescence; photonic crystals; spectroscopy; wide band gap semiconductors; InGaN; air duty cycle; back-side illuminated inverted microscopy; front-side illuminated microphotoluminescence spectroscopy; light extraction efficiency; light-emitting diodes; two dimensional photonic crystals; Light emitting diodes; Measurement by laser beam; Microscopy; Photonic crystals; Spectroscopy; Temperature measurement; Wavelength measurement;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2013 13th IEEE Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-0675-8
DOI :
10.1109/NANO.2013.6720959
