Temperature effect on dark electrical conductivity, Hall coefficient, space charge limited current and photoconductivity of TlGaS2 single crystals

Date

2005-05-01

Author

Qasrawi, AF
Hasanlı, Nızamı

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The dark electrical conductivity, Hall coefficient, space charge limited current, and illumination and temperature dependences of the photocurrent of TIGaS2 single crystals in the temperature regions of 100-350, 200-350, 200-290 and 100-350 K, respectively, have been measured and analysed. The Hall coefficient measurements revealed the extrinsic type of conduction with conductivity-type conversion from p- to n-type at a critical temperature of 315 K. The temperature dependence of the dark electrical conductivity exhibits activation behaviour with activation energies (0.360 +/- 0.005) eV and (0.240 +/- 0.005) eV at high and low temperatures, respectively. The space charge limited current analysis has shown that the energy level of (0.240 +/- 0.005) eV is a trapping state with trap density of (2.2-3.9) x 10(12) cm(-3). The data analysis of the photocurrent-temperature dependence has revealed two photoconductivity activation energies of (0.660 +/- 0.005) eV and (0.360 +/- 0.005) eV in the temperature regions of 290-350 K and 220-280 K, respectively. The illumination dependence of photoconductivity is found to exhibit linear and supralinear recombination mechanisms above and below 290 K, respectively.

Subject Keywords

Electrical and Electronic Engineering, Materials Chemistry, Electronic, Optical and Magnetic Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/35239

Journal

SEMICONDUCTOR SCIENCE AND TECHNOLOGY

DOI

https://doi.org/10.1088/0268-1242/20/5/021

Collections

Department of Physics, Article

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Citation Formats

A. Qasrawi and N. Hasanlı, “Temperature effect on dark electrical conductivity, Hall coefficient, space charge limited current and photoconductivity of TlGaS2 single crystals,” SEMICONDUCTOR SCIENCE AND TECHNOLOGY, pp. 446–452, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35239.