Photovoltaic Effect and Space Charge Limited Current Analysis in TlGaTe_2 Crystals

• Authors: A. Qasrawi , T. Yaseen , B. Eghbariy , N. Gasanly
• Languages of publication: EN

Abstracts

EN

Anisotropic space charge limited current density analysis and photovoltaic effect in TlGaTe_2 single crystals has been investigated. It is shown that, above 330 K, the crystal exhibits intrinsic and extrinsic type of conductivity along (c-axis) and perpendicular (a-axis) to the crystal's axis, respectively. The current density (J) is found to be space charge limited. It is proportional to the square and three halves power of voltage (V) along the a- and c-axis, respectively. Along the a-axis and at sufficiently low electric field values, the activation energy of the current density is found to depend on the one half power of electric field. At high electric fields, the activation energy is field invariant. This behavior is found to be due to the Pool-Frenkel effect and due to a trap set located at 0.26 eV, respectively. Along the c-axis the crystal is observed to operate under the Child-Langmuir space charge limited regime. TlGaTe_2 crystals are found to exhibit photovoltaic properties. The open circuit photovoltage is recorded as a function of illumination intensity at room temperature.

Keywords

EN

72.20.-i; 72.20.Ht; 72.40.+w

Discipline

• 72.20.Ht: High-field and nonlinear effects
• 72.20.-i: Conductivity phenomena in semiconductors and insulators(see also 66.70.-f Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves)
• 72.40.+w: Photoconduction and photovoltaic effects

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 1
• Pages: 152-155

Dates

published

2012-07

received

2010-12-08

Contributors

author

A. Qasrawi

• Department of Physics, Arab-American University, Jenin, West Bank, Palestine
• Group of Physics, Faculty of Engineering, Atilim University, 06836 Ankara, Turkey

author

T. Yaseen

• Department of Physics, Arab-American University, Jenin, West Bank, Palestine

author

B. Eghbariy

• Department of Physics, Arab-American University, Jenin, West Bank, Palestine

author

N. Gasanly

• Department of Physics, Middle East Technical University, 06531 Ankara, Turkey

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Identifiers

DOI

10.12693/APhysPolA.122.152