The PeLEDs were driven by a Keithley 2450 source-meter as a voltage source in ambient air without encapsulation. The luminance, CE and EQE were collected with an Ocean Optics Flame spectrometer and an integrating sphere. Calibration of the spectrometer was done as reported in our previous work50 (link). The luminance was cross-checked using a luminance meter (Konica Minolta, CS-200).
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