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Theoretical investigation of Auger recombination on internal quantum efficiency of blue light-emitting diodes |
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| Authors: | S-H Yen M-C Tsai M-L Tsai Y-J Shen T-C Hsu and Y-K Kuo |
| Institution: | (1) Department of Physics, Research Centre of Ultrafast Science, University of Cyprus, P.O. Box 20537, Nicosia, 1678, Cyprus;(2) Department of Mechanical and Manufacturing Engineering, Materials Science Group, Nanostructured Materials and Devices Laboratory, University of Cyprus, P.O. Box 20537, Nicosia, 1678, Cyprus |
| Abstract: | The Auger recombination is recently proposed as one of the possible origins for the deteriorated internal quantum efficiency of InGaN light-emitting diodes. The Auger recombination behavior is quite different under widely varied Auger coefficients. The effect of Auger coefficient on the efficiency and output power is investigated numerically. The simulation results indicate that the Auger recombination with large Auger coefficient greatly decreases the efficiency in the whole current range under study. It is found that the electron current leakage and nonuniform hole distribution are the possible mechanisms responsible for the efficiency droop at high injection current. |
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