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Optical Energy Gap of Tl2Te3

✍ Scribed by E. Cruceanu; St. Slâdaru; T. Boţilâ

Publisher
John Wiley and Sons
Year
1968
Tongue
English
Weight
115 KB
Volume
30
Category
Article
ISSN
0370-1972

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The optical properties of Te doped GaP single crystals were investigated in the spectral range of 0.20-3.0 ~tm. It was found that the spectral distributions of R, n, er and a,. reflect sharp structure due to valence to conduction-band transitions (E,, E0, El and E2) having the energies 2.16,2.75,3.6

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Crystals of the title compound were obtained by annealing a powder of Tl 2 Te 3 in a vertical temperature gradient (230 °C±240 °C, 4 weeks). Tl 2 Te 3 crystallizes in space group C2/c with lattice parameters of a = 13.275(1) A Ê , b = 6.562(1) A Ê , c = 7.918(1) A Ê , and b = 107.14°(2). The telluri