Abstract
The rise of cryogenic technologies such as quantum computing [P. Platzman and M. Dykman, Science 284, 1967 (1999)] calls for semiconductor devices that can operate efficiently and with low thermal leak at low temperatures. To better understand the behavior of light-emitting diodes (LEDs) at these extreme temperatures, we derive the LED forward characteristics in the case of an InGaAs single-quantum well. We demonstrate the benefits of composition grading for increasing LED current, especially at low temperatures. This is done by deriving the optimum indium composition as a function of position. The results of the derivation are compared with COMSOL Multiphysics simulations and are found to match well.
Original language | English (US) |
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Article number | 175701 |
Journal | Journal of Applied Physics |
Volume | 128 |
Issue number | 17 |
DOIs | |
State | Published - Nov 7 2020 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy