Title :
Enhancement in external quantum efficiency of blue light-emitting diode by photonic crystal surface grating
Author :
Kim, T. ; Danner, A.J. ; Choquette, K.D.
Author_Institution :
Micro & Nanotechnol. Lab., Univ. of Illinois Urbana-Champaign, Urbana, IL, USA
Abstract :
Blue photonic crystal light-emitting diodes were evaluated with photonic crystal hole patterns. The diameter of the holes, lattice constant, and emission wavelength were selected to be 110, 220 and 450 nm, respectively, to attain a maximum enhancement in the wall-plug efficiency. The improvement in external quantum efficiency was 30-50%. Changes in voltage characteristics caused by the etched holes were found to be correlated with increased leakage current.
Keywords :
leakage currents; light emitting diodes; optical materials; photonic crystals; 110 nm; 220 nm; 450 nm; blue light-emitting diode; etched holes; external quantum efficiency; hole patterns; leakage current; photonic crystal surface grating; voltage characteristics; wall-plug efficiency;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20052643
