276145.fig.002a
(a)
276145.fig.002b
(b)
Figure 2: Experimental characteristics: linear scale in (a) and semi-log in (b). The measurements are taken in dark conditions (solid lines) for several values of between 0.1 V and 0.5 V. The dotted lines result from the calculated current according to the proposed unified model. For clarity, only results obtained for  V and  V are presented. The domains of the operation modes are specified in (b).