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Photocurrent spectra of the QDIP at different bias voltages measured in the normal incidence geometry at .
Peak intensity dependence of the peak and the peak with respect to the positive bias voltage. The connection line between data points is guide to the eye.
The photocurrent spectrum at together with a fitting (dashed line) by two deconvoluted Lorentzian peaks (dotted line).
Proposed conduction band diagram with the involved transitions in the QDIP for a small (a) and a large (b) positive bias voltage. and are the two bound states of the dots while and show the two separate continuum states. The closed circle shows a state occupied with an electron and the open circle corresponds to an empty state. (c) depicts the shapes of wave function for , , , as well as .
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