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Absorption edge and urbach's rule in ZnO
Author(s) -
Hvedstrup Jensen G.,
Skettrup T.
Publication year - 1973
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220600118
Subject(s) - absorption edge , absorption (acoustics) , condensed matter physics , phonon , enhanced data rates for gsm evolution , physics , materials science , optics , telecommunications , computer science , band gap
Measurements of the absorption edge of ZnO up to 4000 cm −1 for 11 K < T < 878 K are presented. The results are analyzed in terms of Urbach's rule. For T < 350 K, Urbach's rule is reasonably well fulfilled, and the parameters of the rule are derived. Both LO‐phonons and acoustic phonons seem to be involved in the absorption process. For T > 350 K, Urbach's rule in its usual form is no longer valid.