Scientific Reports 4, Article number: 6974 (2014); Published: 10 November 2014; Updated: 13 March 2015

This Article contains an error in Figure 3. The y-axis should read ‘Current efficiency (cd/A)’. The correct Figure 3 appears below as Figure 1.

figure 1

There is also a typographical error in reference 27: “2024” should read “2014”.