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Marcinkevičius, Saulius; Yapparov, Rinat; Chow, Yi_Chao; Lynsky, Cheyenne; Nakamura, Shuji; DenBaars, Steven_P; Speck, James_S (, Applied Physics Letters)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 (∼2 × 108 cm−2) shows that these extended defects do not notably affect the carrier recombination.more » « less
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Yapparov, Rinat; Chow, Yi Chao; Lynsky, Cheyenne; Wu, Feng; Nakamura, Shuji; Speck, James S.; Marcinkevičius, Saulius (, Journal of Applied Physics)null (Ed.)
