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Estimated IQEs for the blue LED plotted in (a) linear and (b) log scales for current.
Estimated IQEs for the green LED plotted in (a) linear and (b) log scales for current.
EL spectra at 10 mA for (a) blue and (b) green LEDs measured at different temperatures. The main peaks are normalized to give the same value.
Overflow ratio for blue and green LEDs at 50 K, estimated from the IQE curves.
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