Abstract
For a (0001) single crystal in contact with a 0.25M phosphate buffer solution, the transient charging current was recorded by time domain spectroscopy as a function of bias potential. The analysis showed a multiexponential relaxation current due to different space‐charge capacities and interface resistances at different surface areas. The single relaxation currents were dependent on the buffer and on the oxygen concentration in solution, which was interpreted by the adsorption of phosphate ions and oxygen onto the semiconductor and a subsequent change in surface charge and interface resistance. For adsorbed oxygen on , the interface resistance approximately doubles and the adsorption may be potential dependent. By comparison with previous results, it is concluded that only a fraction of the semiconductor‐aqueous electrolyte interface is covered with hydroxyl ions.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
