High efficiency planar microcavity LED's: comparison of design and experiment

Abstract

This paper describes the design of substrate emitting microcavity LED's and a comparison of experimental results with modeling results. The modeling is based on a simulation tool which accounts for guided modes, quantum well reabsorption and photon recycling. The overall quantum efficiencies of X/2 and X cavities both with a 60% and a !M% reflecting DBR mirror are compared and a good qualitative correspondence is found between theory and experiment. The maximum theoretical overall quantum efficiency for the considered structures is expected to be around 14%' whereas the best experimental value amounts to 10.2%.

Effect of SiO2/Si3N4 dielectric distributed Bragg reflectors (DDBRs) for Alq3/NPB thin-film resonant cavity organic light emitting diodes

“…Due to a redirection of the Airy mode inside the escape window, the extraction efficiency of RCLED is higher than that of the conventional LED. Besides, RCLED also takes the advantages of lower divergence of output beams, higher spectral purity, better temperature stability and higher modulation bandwidth as compared to the conventional LEDs [7][8][9][10][11]. Some pioneers have presented the effects of emission color and view angle for OLED with SiO 2 /Si 3 N 4 DBRs.…”

650nm Resonant-cavity light-emitting diodes with dielectric distributed Bragg reflectors

“…Streubel et al [5] indicated that RCLEDs have an extraction efficiency of one order in magnitude than the conventional planar LEDs, and this result has been proven in many literatures [6][7][8]. Besides, RCLEDs also have the advantages of lower divergence of output beams, higher spectral purity, better temperature stability and higher modulation bandwidth as compared to the conventional LEDs [9][10][11][12][13].…”

Textured zinc oxide prepared by liquid phase deposition (LPD) method and its application in improvement of extraction efficiency for 650nm resonant-cavity light-emitting diode (RCLED)

“…Due to a redirection of the Airy mode inside the escape window, the RCLEDs have higher extraction efficiency than the conventional LEDs. Streubel et al [16] indicated that RCLEDs have an extraction efficiency of one order in magnitude stronger than the conventional planar LEDs, and this result has been proven in many literatures [17][18][19]. In order to perform the practicability of LPD-ZnO, the textured LPD-ZnO film was applied to AlGaInP/GaInP resonant cavity light emitting diodes (RCLEDs) to meliorate the extraction efficiency.…”