Abstract
We investigate the use of photonic crystals for light extraction from high-brightness thin-film AlGaInP light-emitting diodes with different etch depths, lattice constants, and two types of lattices (hexagonal and Archimedean). Both simulations and experimental results show that the extraction of high order modes with a low effective index n(eff) is most efficient. The highest external quantum efficiency without encapsulation is 19% with an Archimedean A7 lattice with reciprocal lattice constant G=1.5 k(0), which is 47% better than an unstructured reference device. (C) 2008 American Institute of Physics.
Original language | English |
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Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 93 |
DOIs | |
Publication status | Published - 28 Jul 2008 |
Keywords
- SPONTANEOUS EMISSION