Effects of antimony diffusion into porous silicon light emitting diodes

Porous silicon (PS) light emitting diodes (LEDs) consisting of n-PS/p-PS/p-Si or n-PS/p-Si structures fabricated by postanodical Sb diffusion were characterized for assessment of the effect of Sb diffusion upon PS-LED characteristics. The homogeneity of electrical characteristics of PS-LEDs was improved by Sb diffusion. Consequently, the average series resistance of the Sb-diffused PS-LEDs was found to be lower than that of nondiffused PS-LEDs. The average external quantum efficiency of the PS-LEDs was also enhanced by Sb diffusion. The experimental results ii-ere discussed.