Space-charge-limited-current spectroscopy: Possibilities and limitations

Abstract
Criteria for space-charge-limited currents to be applied as a spectroscopical method for localized electron states elucidation are examined, namely, density of states, their energy position, and temperature. The “visibility’’ of the states is determined by the statistics of the occupation of the injected space charge. The resolving power of the method is increased by decreasing temperature during the experiment.