(a) Photoresponse measurements as a function of time for white light excitation. The highlighted area shows point where the light was switched on/off. KBr is hygroscopic, so already slight differences in air humidity and/or the time for handling the KBr disc and the actual measurement will lead to changes in the observed water bands. (b) The current of different wavelengths in time. (c) Photocurrent as a function of the illuminated light, normalized in respect to surface power density (given absorption efficiency), including the normalized transmission of the excitation filter characteristics from 300 nm to 1200 nm. (d) I-V characteristics for a linear microwire. Inset shows the device made by dielectrophoresis. The zinc phosphide wire is contacted between two metal electrodes (height: 100 nm) with a gap of ~60 μm. The known line for stability by two different measurements: the black initial is the original measurement and the red line is the measure after 7-day differences.