Recycling of guided mode light emission in planar microcavity light ling diodes

摘要

Results are presented on planar microcavity light emitting diodes with different device diameters. A record external quantum efficiency of 20 is achieved for a 1.5 mm light emitting diode. The strong dependence of the quantum efficiency on current density and device size are compared with theoretical results. A good correspondence is obtained when spectral broadening and photon recycling are taken into account. # 1997 American Institute of Physics. S0003-6951 (97)02007-X