Figure 5.

Photovoltage spectra obtained at 80 K. The diode is irradiated by the light of a tungsten lamp through a Si filter. The power density of light with hν<Eg(300 K) on the diode is shown in the legend in mW/cm2; dashed lines are guides to the eye.

Chizh et al. Nanoscale Research Letters 2013 8:177   doi:10.1186/1556-276X-8-177
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