TY - JOUR
T1 - Strain effects on the energy band-gap in oxygenated CdTe thin films studied by photoreflectance
AU - Alejo-Armenta, L. N.
AU - Espinoza-Beltrán, F. J.
AU - Alejo-Armenta, C. A.
AU - Vázquez-López, C.
AU - Arizpe-Chávez, H.
AU - Ramírez-Bon, R.
AU - Zelaya-Angel, O.
AU - González-Hernández, J.
N1 - Funding Information:
This work was partially supported by CONACyT 4291-E9406, FOMES, and PROMEP-SEP from Mexico.
PY - 1999/6
Y1 - 1999/6
N2 - The incorporation of oxygen during the preparation of sputtered CdTe films produces a strong strain of the zincblende (cubic) lattice. First as a consequence of this, the energy band-gap shifts to lower energies and then, for larger strains, the degeneracy of the hole valence bands splits into two bands at the fundamental band-gap. These two transitions were measured using photo-reflectance spectroscopy (PRS) as a function of the oxygen content. The energy band-gap shift resulting from tensile stress in the films was calculated using the elastic constants and deformation potentials for CdTe as well as the measured interplanar spacing values of the (1 1 1) CdTe X-ray diffraction peak.
AB - The incorporation of oxygen during the preparation of sputtered CdTe films produces a strong strain of the zincblende (cubic) lattice. First as a consequence of this, the energy band-gap shifts to lower energies and then, for larger strains, the degeneracy of the hole valence bands splits into two bands at the fundamental band-gap. These two transitions were measured using photo-reflectance spectroscopy (PRS) as a function of the oxygen content. The energy band-gap shift resulting from tensile stress in the films was calculated using the elastic constants and deformation potentials for CdTe as well as the measured interplanar spacing values of the (1 1 1) CdTe X-ray diffraction peak.
UR - http://www.scopus.com/inward/record.url?scp=0032627503&partnerID=8YFLogxK
U2 - 10.1016/S0022-3697(98)00338-2
DO - 10.1016/S0022-3697(98)00338-2
M3 - Artículo
SN - 0022-3697
VL - 60
SP - 807
EP - 811
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 6
ER -