CdSe粉末の電気的性質
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概要
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Hereunder is given a brief report of investigation that was made of Cl-doped CdSe powders, with particular reference to that metal being nonlinear in its current-voltage curve. In view of the hypothesis if the said current-voltage relation is dependent on the particle size, microscopic observation of CdSe under electron beams was performed, and it has been concluded as its result that the nonlinearity of the material has originated in the areas where the particles come in contact with one another, as will be confirmed by the similar case with interparticle contact in spherical crystals.The experiments that were carried out within the temperature region between 123°K and 293 °K show that the current-voltage relation is best expressed as proportional to the product of terms A and B as below.A: its dependence on temperatureB: its dependence on voltageConcerning the causes of the nonlinear current-voltage characteristics there are five things that can be considered as possible factors as follows.(1) The space-charge limited current(2) The thermal breakdown(3) The avalanche breakdown(4) The thermal current(5) The tunnelingOf these five potential causes, the last, (5), will best explain the results of the experiments, though it is not known yet what sort of barriar the electron current must tunnel through.
- 社団法人 日本材料学会の論文