Abstract

A detailed theoretical derivation and calculation method of the difference coefficient between a light distribution pattern of a ${{30}} \times {{20}}\;\unicode{x00B5} {{\rm{m}}^2}$ green micro-LED array and Lambert source is proposed first in this paper, to the best of our knowledge, which establishes an accurate relationship between external quantum efficiency and current efficiency (cd/A). The variation of capacitance with voltage and wavelength blueshift is illustrated by a carrier recombination mechanism. The current efficiency reaches 132.5 cd/A for the ${{60}} \times {{50}}\;\unicode{x00B5} {{\rm{m}}^2}$ and 121.7 cd/A for the ${{25}} \times {{15}}\;\unicode{x00B5} {{\rm{m}}^2}$ arrays, and the mechanism caused by size dependence is analyzed in detail combined with the classical ABC model.

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