Fig. 3: Size-dependent efficiency loss in micro-LEDs.
From: Future trends of display technology: micro-LEDs toward transparent, free-form, and near-eye displays

a Comparison of micro-LEDs and other emissive LEDs. b EQE degradation based on micro-LED size. c Characteristics of InGaN- and AlGaInP-based red LEDs. d EQE variation based on the size of InGaN- and AlGaInP-based red LEDs