期刊
APPLIED PHYSICS LETTERS
卷 119, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/5.0063237
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资金
- Swedish Energy Agency [2018-04783]
- Swedish Research Council [45390-1]
- Solid State Lighting and Energy Electronics Center (SSLEEC)
- Simons Foundation [601952]
- National Science Foundation (NSF) RAISE program [DMS-1839077]
- Swedish Research Council [2018-04783] Funding Source: Swedish Research Council
Time-resolved and quasi-cw photoluminescence spectroscopy was used to measure the internal quantum efficiency of c-plane InGaN single quantum wells. The low temperature IQE was found to be 100%, with IQE over 60% for QWs emitting in green and green-yellow spectral regions at 300 K. Extended defects like threading dislocations and V-defects did not significantly affect carrier recombination.
Time-resolved and quasi-cw photoluminescence (PL) spectroscopy was applied to measure the internal quantum efficiency (IQE) of c-plane InGaN single quantum wells (QWs) grown on sapphire substrates using metal-organic chemical vapor deposition. The identical temperature dependence of the PL decay times and radiative recombination times at low temperatures confirmed that the low temperature IQE is 100%, which allowed evaluation of the absolute IQE at elevated temperatures. At 300 K, the IQE for QWs emitting in green and green-yellow spectral regions was more than 60%. The weak nonradiative recombination in QWs with a substantial concentration of threading dislocations and V-defects (similar to 2 x 10(8) cm(-2)) shows that these extended defects do not notably affect the carrier recombination.
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