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Bandgap and defect engineered amorphous silicon based nipin photo diodes can be used as color detectors. Changing the applied voltage from [minus ]1.5 V to [minus ]0.6 V and 1.0 V shifts the responsivity from red, to green, to blue, respectively. Wavelength dependent voltage switching and switching-on the illumination experiments are carried out to investigate the transient behavior and to determine...