From the dependence of the photovoltage of the p-n junction on the temperature of black body radiation, with which the junction is illuminated, the optical activation energy of germanium E0=0.62±0.02 eV at 300 ∘K is determined. On the basis of this measurement, and an analysis of the conductivity and optical measurements given in the literature, reasons are presented which render probable the conclusion that the optical activation energy of germanium is equal to the width of the band of forbidden energy values, of magnitude EG=0.75−4.10−4T eV.
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It is my agreeable duty to extend my thanks to K. Šmirous for the preparation of suitable samples, and A. Abrahám and V. Ondříčková for their aid in the experimental work.
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Tauc, J. Determination of the optical activation energy of germanium by the method of photoelectric lines. Czech J Phys 4, 311–314 (1954). https://doi.org/10.1007/BF01687416
- Activation Energy
- Optical Measurement
- Optical Activation