Investigation of Carrier Transport Mechanisms in the Cu-Zn Based Hetero-Structure Grown by Sputtering Technique
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Date
2018
Authors
Gullu, H. H.
Sürücü, Özge
Terlemezoglu, M.
Bayrakli, O.
Güllü, Hasan Hüseyin
Yildiz, D. E.
Parlak, M.
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Publisher
Canadian Science Publishing
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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(-2)K(-2) by means of modified Richardson plot.
Description
parlak, mehmet/0000-0001-9542-5121; Yıldız, Dilber Esra/0000-0003-2212-199X; Terlemezoglu, Makbule/0000-0001-7912-0176; SURUCU, Özge/0000-0002-8478-1267
Keywords
Schottky barriers, junction diodes, surface and interface states, thermionic emission, sputtering
Turkish CoHE Thesis Center URL
Fields of Science
Citation
10
WoS Q
Q4
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Source
33rd International Physics Conference of Turkish-Physical-Society (TPS) -- SEP 06-10, 2017 -- Konacik, TURKEY
Volume
96
Issue
7
Start Page
816
End Page
825