Internal quantum efficiency in 6.1 Å superlattices of 77% for mid-wave infrared emitters
| Autor: | J. T. Olesberg, John P. Prineas, Aaron J. Muhowski, A. M. Muellerleile |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) Condensed Matter::Other Infrared business.industry Superlattice Maxwell–Boltzmann statistics 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology 01 natural sciences law.invention Condensed Matter::Materials Science Abc model law 0103 physical sciences Optoelectronics Quantum efficiency 0210 nano-technology business Light-emitting diode |
| Zdroj: | Applied Physics Letters. 117:061101 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | Two new superlattices with high internal quantum efficiency at high injection, InAs/AlGaInSb and InAs/GaInSb/InAs/AlAsSb, are presented and compared with state-of-the-art InAs/GaSb and InAs/InAsSb superlattices. The internal quantum efficiency peaks at 44% and 77% for the InAs/AlGaInSb and InAs/GaInSb/InAs/AlAsSb samples, respectively, which suggests that they are excellent candidates for high-efficiency mid-wave infrared LEDs. These values have been measured without invoking the ABC model to eliminate the assumption of Boltzmann statistics. The calculated superlattice band structures are used qualitatively to explain the internal quantum efficiency results. |
| Databáze: | OpenAIRE |
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