Advances in OptoElectronics / 2012 / Article / Fig 2

Research Article

Room Temperature Direct Band Gap Emission from Ge p-i-n Heterojunction Photodiodes

Figure 2

Electroluminescence spectrum of the Ge p-i-n heterojunction photodiode as function of the electrical drive current density. The inset shows the intensity of the electroluminescence at peak position in dependence of the current driven trough the device.