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Electrical and Interfacial Properties of p-Si/P3HT Organic-on-Inorganic Junction Barrier

100%
Yakuphanoglu F., Shah M., Aslam Farooq W.
Acta Physica Polonica A
|
2011
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vol. 120
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issue 3
558-562
EN
The electrical characterization of the Al/p-Si/P3HT/Ag organic-on-inorganic diode was done by current-voltage, capacitance-voltage and conductance-voltage methods. The values of ideality factor and barrier height of the diode were determined from the current-voltage characteristics and found as 2.32 and 0.77 eV, respectively. These values were also determined from Cheung's functions and Norde's method due to the non-ideal behavior of the diode. The electronic parameters obtained from the various methods indicate a good consistency with each other. The density of interface states for Al/p-Si/P3HT/Ag organic-on-inorganic diode was found to be 7.64 × 10^{10} cm^{-2} eV^{-1}. The obtained electrical parameters of the Al/p-Si/P3HT/Ag organic-on-inorganic diode are higher than that of the conventional Ag/p-Si Schottky diodes. This indicates that the electrical properties of the silicon Schottky diodes can be controlled using organic interfacial layer.
2
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Frequency Dependent Electrical Characteristics οf Au/n-Si/CuPc/Au Heterojunction

88%
Ahmad Z., Sayyad M., Karimov K., Saleem M., Shah M.
Acta Physica Polonica A
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2010
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vol. 117
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issue 3
493-496
EN
Electrical characteristics of the heterojunction fabricated by thermal deposition of copper phthalocyanine (CuPc) on an n-silicon substrate have been investigated. The frequency has significant effect on capacitance (C), conductance (G) and series resistance (R_{s}) interface states (D_{it}) of the junction. Measured capacitance and conductance were corrected for R_{s}. The conductance technique was used to measure the density of the interface states. This method revealed the value of the interface state density distribution for the Au/n-Si/CuPc/Au interfaces of the order of 10^{12} cm^{-2} eV^{-1}.
3
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Experimental and Numerical Determination of Apparent Mass Variation of Granular Media Confined in Silo Geometry

76%
Qadir A., Ispalove N., Ali A., Chand R., Shah M., Khan A., Hussain K.
Acta Physica Polonica A
|
2016
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vol. 129
|
issue 3
378-382
EN
Granular materials have vast applications both in industry and in daily life. They display quite interesting and exceptional properties different from the other known forms of matter. To investigate the complex properties of particulate materials, experimental, analytical, and numerical techniques have been employed. In this paper the results of experimental and numerical tests of various grain sizes and coefficient of friction between granules and cylindrical walls on the mass measured at bottom of container, known as apparent mass, are reported. It is revealed that apparent mass augments with the grain size. Moreover, it is also found that the variation in apparent mass measurement is strongly dependent on bead diameter rather than the silo size. The results suggest that the conversion of vertical stresses into horizontal in silo is mainly due to the friction between the grain and system boundary than the arching phenomenon.
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