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(a) Sample and experimental setup for measurement of photoemission from a self-supporting nc-PS layer. A cw laser (He–Cd: in wavelength) was used for excitation. (b) and (c) Stationary photocurrent and the photoemission current vs applied voltage at temperatures of 300 and .
Experimental configuration for TOF measurements. An UV laser pulse ( in wavelength and in duration) was used for excitation. Transient photocurrent is observed with a digital oscilloscope.
Transient photocurrent signals under various field strengths for a -thick self-supporting nc-PS layer at temperatures of (a) and (b).
Estimated values of electron drift velocity in nc-PS as a function of electric field. The values in reported by Canali et al. (Ref. 15) are also shown for reference.
Estimated values of electron mean free path in nc-PS as a function of electric field. The values in reported by Canali et al. (Ref. 15) are also shown for reference.
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