Front Cover Picture: Laser & Photon. Rev. 7(3)/2013


An efficiency versus current curve of a conventional GaInN-based LED showing the droop phenomenon. Proposed droop mechanisms including Auger recombination and carrier leakage together with radiative recombination are illustrated on an energy band diagramof a GaInN-based LED.

(Picture: J. Cho, E. F. Schubert, J.KyuKim, pp.408–421, in this issue)