Abstract
For quite a long time the optical gap of trigonal Selenium was not well understood. Even after the gap was known to be indirect [1, 2] a definitive assignment of the involved valence band maxima and conduction band minima was not possible. The knowledge of these properties could provide a key to understand important features of the conductivity in Se. In this work the assignment of the gap is derived from luminescence measurements; the results are consistent with calculations of the electronic structure and explain earlier optical measurements. Compared to earlier luminescence measurements [3] the most important features of these experiments are:
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excellent samples
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resonant excitation of the luminescence.
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Moreth, B. (1979). Identification of the Indirect Transition in Trigonal Selenium. In: Gerlach, E., Grosse, P. (eds) The Physics of Selenium and Tellurium. Springer Series in Solid-State Sciences, vol 13. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-81398-6_20
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DOI: https://doi.org/10.1007/978-3-642-81398-6_20
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