Achieving a high internal quantum efficiency in GaAs/AlGaAs based light-emitting diodes (LEDs) for room-temperature operation at low current-density injection is crucial for applications such as optical up-converters based on the integration of LEDs and photodetectros. We report the experimental results as well as the theoretical analyses of the internal quantum efficiency of GaAs/AlGaAs LEDs as a function of the p-doping concentration of the active region for low current injection operation. By optimizing the doping concentration, we have achieved a close to 100% internal quantum efficiency for room-temperature operation of LEDs in the low injection current-density range, i.e., around 0.1 A/cm(2). An optical up-converter was fabricated using wafer-fusion technology by integrating the optimized GaAs/AlGaAs LED with an InGaAs/InP photodetector. The internal up-conversion quantum efficiency was measured to be 76%. (C) 2004 American Institute of Physics.
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[Anonymous], 1996, Devices for optoelectronics
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Ecole Polytech, UMR 7643 CNRS, Phys Mat Condensee Lab, F-91128 Palaiseau, FranceEcole Polytech, UMR 7643 CNRS, Phys Mat Condensee Lab, F-91128 Palaiseau, France
Benisty, H
De Neve, H
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De Neve, H
Weisbuch, C
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Karim, A
Abraham, P
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Abraham, P
Lofgreen, D
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Lofgreen, D
Chiu, YJ
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Chiu, YJ
Piprek, J
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Piprek, J
Bowers, J
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
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Ecole Polytech, UMR 7643 CNRS, Phys Mat Condensee Lab, F-91128 Palaiseau, FranceEcole Polytech, UMR 7643 CNRS, Phys Mat Condensee Lab, F-91128 Palaiseau, France
Benisty, H
De Neve, H
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机构:Ecole Polytech, UMR 7643 CNRS, Phys Mat Condensee Lab, F-91128 Palaiseau, France
De Neve, H
Weisbuch, C
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机构:Ecole Polytech, UMR 7643 CNRS, Phys Mat Condensee Lab, F-91128 Palaiseau, France
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Karim, A
Abraham, P
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Abraham, P
Lofgreen, D
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Lofgreen, D
Chiu, YJ
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Chiu, YJ
Piprek, J
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Piprek, J
Bowers, J
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA