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Wavelength‐Modulated Absorption Spectra of Pseudodirect Bandgap A 2 B 4 C Compounds

1974; Wiley; Volume: 62; Issue: 1 Linguagem: Inglês

10.1002/pssb.2220620137

1521-3951

G.-J. Babonas, G. Ambrazevičius, V. S. Grigoreva, V. Neviera, A. Šileika,

Quantum Dots Synthesis And Properties

Abstract The wavelength‐modulated absorption spectra of ZnGeP 2 , ZnSiAs 2 , ZnSiP 2 , and CdSiP 2 chalcopyrite crystals have been investigated with polarized light in the region of the absorption edge at 77 and 300 °K. Structures due to the pseudodirect optical transitions derived from indirect ones in sphalerite have been observed. The valence band structure and the relative location of the energy levels in the conduction band of the pseudodirect‐band gap A 2 B 4 C compounds have been determined.