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Investigation of carrier transport mechanisms in the Cu-Zn-Se based hetero-structure grown by sputtering technique

Date

2018

Author

Güllü, Hasan Hüseyin
Terlemezoğlu, Makbule
Bayraklı Sürücü, Özge
Yıldız, Dilber Esra
Parlak, Mehmet

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Citation

Güllü, H. H., Terlemezoğlu, M., Bayraklı, Ö., Yıldız, D. E., Parlak, M. (2018). Investigation of carrier transport mechanisms in the Cu–Zn–Se based hetero-structure grown by sputtering technique. Canadian Journal of Physics, 96(7), 816-825.

Abstract

In this paper, we present results of the electrical characterization of n-Si/p-Cu-Zn-Se hetero-structure. Sputtered film was found in Se-rich behavior with tetragonal polycrystalline nature along with (112) preferred orientation. The band gap energy for direct optical transitions was obtained as 2.65 eV. The results of the conductivity measurements indicated p-type behavior and carrier transport mechanism was modelled according to thermionic emission theory. Detailed electrical characterization of this structure was carried out with the help of temperature-dependent current-voltage measurements in the temperature range of 220-360 K, room temperature, and frequency-dependent capacitance-voltage and conductance-voltage measurements. The anomaly in current-voltage characteristics was related to barrier height inhomogeneity at the interface and modified by the assumption of Gaussian distribution of barrier height, in which mean barrier height and standard deviation at zero bias were found as 2.11 and 0.24 eV, respectively. Moreover, Richardson constant value was determined as 141.95 Acm-2K-2 by means of modified Richardson plot. © 2018 Published by NRC Research Press.

Source

Canadian Journal of Physics

Volume

96

Issue

7

URI

https://doi.org/10.1139/cjp-2017-0777
https://hdl.handle.net/11491/488

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