Yazar "Bayhan, Habibe" için listeleme
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Admittance and impedance spectroscopy on Cu(In,Ga)Se2 solar cells
The present work reports some experimental results on the electrical properties of high efficiency ZnO/CdS/Cu(In,Ga)Se2 heterojunction solar cells. Admittance spectroscopy has been employed for characterisation of the bulk ... -
An analysis of the effect of illumination to the reverse and forward bias current transport mechanisms in an efficient n-ZnO/n-CdS/p-Cu(In,Ga)Se-2 solar cell
Bayhan, Habibe; Bayhan, Murat (Pergamon-Elsevier Science Ltd, 2013)Temperature dependent current voltage measurements are used to determine the effect of white light illumination on the dominant current transport mechanism in an efficient n-ZnO/n-CdS/p-Cu(In,Ga)Se-2 heterojunction solar ... -
A comparison of the effect of CdCl2 and MgCl2 processing on the transport properties of n-CdS/p-CdTe solar cells and a simple approach to determine their back contact barrier height
Bayhan, Habibe; Özden, şadan; Major, J. D.; Bayhan, M.; Dağdeviren, E. T.; Durose, K. (Pergamon-Elsevier Science Ltd, 2016)A simple approach, which can estimate the barrier height of non-Ohmic back contacts for CdS/CdTe solar cell by using its temperature dependent forward biased current-voltage data, is explained. The method involves modelling ... -
Conduction Mechanism of an Infrared Emitting Diode: Impedance Spectroscopy and Current-Voltage Analysis
Dönmez, Adem; Bayhan, Habibe (Maik Nauka/Interperiodica/Springer, 2012)The bias dependent complex impedance spectra of a conventional GaAs based infrared emitting diode have been studied in the temperature range 150-300 K. It is found that for bias voltages lower than 0.7 V, the device behaves ... -
Determination of defect distribution in a Ga-rich ZnO/CdS/Cu (In, Ga) $Se_2$ solar cell by admittance spectroscopy
Bayhan, Habibe (2005)This article presents a study on the energy distribution of defects in efficient thin film ZnO/CdS/Cu(In,Ga)$Se_2$ heterojunction solar cell by the use of admittance spectroscopy. The capacitance spectra of the device has ... -
Exact analytical solution of the diode ideality factor of a pn junction device using Lambert W-function model
The paper presents a new analytical method for extracting the diode ideality factor of a p-n junction device using Lambert W-function model and the dark current-voltage data. The extracted values are found to be in good ... -
Forward and reverse current-voltage-temperature characteristics of a typical BPW34 photodiode
Bayhan, Habibe; Özden, Şadan (Pergamon-Elsevier Science Ltd, 2006)The dark forward and reverse current-voltage characteristics of a typical BPW34 silicon photodiode have been investigated in the temperature range 80-300 K. We propose that tunnelling enhanced recombination at or close to ... -
Frequency dependence of junction capacitance of BPW34 and BPW41 p-i-n photodiodes
Bayhan, Habibe; Ozden, Sadan (Indian Academy Sciences, 2007)This article investigates the frequency dependence of small-signal capacitance of silicon EPW34 and BPW41 (Vishay) p-i-n photodiodes. We show that the capacitance-frequency characteristics of these photodiodes are ... -
Measurement and comparison of complex impedance of silicon p-i-n photodiodes at different temperatures
Bayhan, Habibe; Ozden, S. (Maik Nauka/Interperiodica/Springer, 2007)The dark alternating current (ac) parameters of BPW34 and BPW41 (Vishay-Telefunken) silicon p-i-n photodiodes arc measured and compared at different temperatures using the impedance spectroscopy technique. The impedance ... -
Measurement and comparison of silicon p-i-n-photodiodes with ac impedance at different voltages
Özden, Şadan; Bayhan, Habibe; Donmez, A.; Bayhan, M. (Maik Nauka/Interperiodica/Springer, 2008)The dark alternating current (ac) parameters of commercially available silicon p-i-n-photodiodes are measured and compared at room temperature both in forward and reverse bias using the impedance spectroscopy technique. ... -
n -CdS/ p-Cu (In, Ga)Se2 heteroeklem güneş pilinde akım iletim mekanizmasının belirlenmesi
Bayhan, Habibe; Kavasoğlu, Sertap; Oktik, Şener (2001)Bu çalışmada Stuttgart Üniversitesi IPE laboratuarlarında hazırlanan ve emici tabakasını oluşturan materyallerin göreli ağırlık oranları; %22.26 Cu, %19.46 In,"%7.27 Ga ve %51.02 Se olan n-CdS/p-Cu(In,Ga)Se2 heteroeklem ... -
Origins of Reverse Bias Currents in a Typical BPW34 Photodiode
Bayhan, Habibe; Özden, Şadan (Scientific Technical Research Council Turkey-Tubitak, 2005)Measurements of the dark reverse current in a typical BPW34 silicon photodiode have been made in the temperature range 100-300 K at various reverse bias voltages ranging from 0 to 60 V. Various transport models have been ... -
Regimes of current transport mechanisms in CdS/CdTe solar cells
Bayhan, Habibe; Dağkaldiran, E. T.; Major, J. D.; Durose, K.; Bayhan, Murat (Iop Publishing Ltd, 2019)Forward bias recombination (current transport) mechanisms have been evaluated for thin film solar cells and correlated to the in-gap trap levels present. Here CdTe/CdS devices were chosen as an archetypal example of a ... -
Study of CdS/Cu(In,Ga)Se-2 heterojunction interface using admittance and impedance spectroscopy
Bayhan, Habibe; Kavasoglu, A. Sertap (Pergamon-Elsevier Science Ltd, 2006)The interface properties of an unusual CdS/Cu(In, Ga)Se-2 solar cell have been studied by admittance and impedance spectroscopy. The current transport in this device has previously appeared to be dominated by tunnelling ... -
Study of CdS/Cu(In,Ga)Se-2 interface by using n values extracted analytically from experimental data
Bayhan, Habibe (Pergamon-Elsevier Science Ltd, 2009)This paper presents that in analytical method based on Lambert W-function can be applied to estimate the value of the diode ideality factor n, of a ZnO/CdS/Cu(In,Ga)Se-2 (CIGS) solar cell by using its dark current-voltage ... -
Tunneling-Enhanced Recombination in Polycrystalline CdS/CdTe Solar Cells
Bayhan, Habibe (Scientific Technical Research Council Turkey-Tubitak, 2006)The dominant dark current transport mechanism in as-grown and CdCl2 processed CdS/CdTe heterojunction solar cells for temperatures below 300 K was investigated. The current-voltage properties of these solar cells is explained ... -
Tunnelling enhanced recombination in polycrystalline CdS/CdTe and CdS/Cu(In,Ga)Se-2 heterojunction solar cells
Bayhan, Habibe; Kavasoğlu, Abdulkadir Sertap (Pergamon-Elsevier Science Ltd, 2005)This article investigates the results of current-voltage measurements made at different temperatures on vacuum deposited ZnO/CdS/Cu(In,Ga)Se-2 and CdS/CdTe heterojunction solar cells. We propose that the current-voltage ...
