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Efficiency droop in AlGaInP and GaInN light-emitting diodes
- Authors
- Shim, Jong-In; Han, Dong-Pyo; Kim, Hyunsung; Shin, Dong-Soo; Lin, Guan-Bo; Meyaard, David S.; Shan, Qifeng; Cho, Jaehee; Schubert, E. Fred; Shim, Hyunwook; Sone, Cheolsoo
- Issue Date
- Mar-2012
- Publisher
- American Institute of Physics
- Keywords
- QUANTUM-WELL LASERS
- Citation
- Applied Physics Letters, v.100, no.11, pp.1 - 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- Applied Physics Letters
- Volume
- 100
- Number
- 11
- Start Page
- 1
- End Page
- 5
- ISSN
- 0003-6951
- Abstract
- At room temperature, AlGaInP pn-junction light-emitting diodes (LEDs) emitting at 630 nm do not exhibit an efficiency droop. However, upon cooling the AlGaInP LEDs to cryogenic temperatures, they show a pronounced efficiency droop. We attribute the efficiency droop in AlGaInP LEDs to electron-drift-induced reduction in injection efficiency (i.e., carrier leakage out of the active region) mediated by the asymmetry of the pn junction, specifically the disparity between electron and hole concentrations and mobilities, with the concentration disparity exacerbated at low temperatures. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3694044]
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Related Researcher
- Shin, Dong Soo
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY (DEPARTMENT OF PHOTONICS AND NANOELECTRONICS)