Abstract
The room temperature crystal data, Debye temperature, dark and photoelectrical properties of the Bridgman method grown Tl~2~InGaTe~4~ crystals are reported for the first time. The Xβray diffraction technique has revealed that Tl~2~InGaTe~4~ is a single phase crystal of tetragonal bodyβcentered structure belonging to the space group. A Debye temperature of 124 K is calculated from the results of the Xβray data. The currentβvoltage measurements have shown the existence of the switching property of the crystals at a critical voltage of 80 V. The dark electrical resistivity and Hall effect measurements indicated the n βtype conduction with an electrical resistivity, electron density and Hall mobility of 2.49Γ10^3^ Ξ© cm, 4.76Γ10^12^ cm^β3^ and 527 cm^2^V^β1^s^β1^, respectively. The photosensitivity measurements on the crystal revealed that, the variation of photocurrent with illumination intensity is linear, indicating the domination of monomolecular recombination at room temperature. Moreover, the spectral distribution of the photocurrent allowed the determination of the energy band gap of the crystal studied as 0.88 eV. (Β© 2007 WILEYβVCH Verlag GmbH & Co. KGaA, Weinheim)