Figure 2

Electrical characteristic for samples I, II, and III.
Semi-logarithmically plotted normalized light output power versus injection current at 300 K. The regions are divided two with variation of gradient. (red and white).

Electrical characteristic for samples I, II, and III.
Semi-logarithmically plotted normalized light output power versus injection current at 300 K. The regions are divided two with variation of gradient. (red and white).