Photoeffects in Fe2O3 sintered semiconductors
- 1 January 1979
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 50 (1) , 369-373
- https://doi.org/10.1063/1.325672
Abstract
Polycrystalline sintered pellets of α‐Fe2O3 have been studied by capacitance and photoelectrochemical techniques. The pellets exhibit (i) photocurrent saturation at a given wavelength with increasing applied voltage, (ii) large dark currents at low applied voltage (0.76 μA cm−2 at +0.2 V SCE), (iii) cathodic and anodic photocurrent transients at low levels of monochromatic irradiation, (iv) photocurrent onset at photon energies greater than 2.1 eV, and (v) flat‐band potentials of −0.67 V SCE and pH=4. Capacitance measurements followed a Mott‐Schottky relationship indicating a predominance of the semiconductor space‐charge layer over surface states and electrolyte effects. No degradation of the semiconductor properties could be observed at pH=4.This publication has 18 references indexed in Scilit:
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