Yazar "Olgar, Mehmet Ali" için listeleme
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Characterization of Cu(In,Ga)(Te,S)(2) thin films grown on stainless steel foil substratesIo
Karaca, Abdullah; Başol, Bülent M.; Olgar, Mehmet Ali; Büyüklimanlı, Temel; Tomakin, Murat; Küçükömeroğlu, Tayfur; Bacaksız, Emin (IOP Publishing, 2023)In this study, Cu(In,Ga)(Te,S)(2) (CIGTS) thin films with [Ga]/([In] +/- [Ga]) atomic ratios in the ranges of 0.22-0.28 and 0.50-0.67 were fabricated using a two-stage technique. During the first stage of the technique, ... -
Cu(In,Ga)(Se,Te)(2) films formed on metal foil substrates by a two-stage process employing electrodeposition and evaporation
Atasoy, Yavuz; Başol, Bülent M.; Olgar, Mehmet Ali; Tomakin, Murat; Bacaksız, Emin (Elsevier Science Sa, 2018)Cu(In,Ga)(Se,Te)(2) or CIGST films were grown over molybdenum coated stainless steel foil substrates using a two-stage technique. the process involved deposition of a Cu-In-Ga/Se-Te precursor stack over the Mo layer using ... -
CZTS layers formed under sulfur-limited conditions at above atmospheric pressure
Olgar, Mehmet Ali; Bacaksız, Emin; Tomakin, Murat; Küçükömeroğlu, Tayfur; Başol, Bülent M. (Elsevier Sci Ltd, 2019)In this study CZTS thin films were grown by a two-stage process that involved sequential sputter deposition of metallic Cu, Zn, and Sn layers on Mo coated glass substrates followed by RTP annealing in a sulfur atmosphere ... -
Effect of heat treating metallic constituents on the properties of Cu2ZnSnSe4 thin films formed by a two-stage process
Olgar, Mehmet Ali; Başol, Bülent M.; Atasoy, Yavuz; Tomakin, Murat; Aygün, Gülnur; Özyüzer, Lütfi; Bacaksız, Emin (Elsevier Science Sa, 2017)In this study Cu2ZnSnSe4 (CZTSe) thin films were grown by a two-stage process that involved sputter deposition of a Cu/Sn/Zn/Cu metallic stack, annealing the stack at various temperatures for 30 min, evaporation of a Se ... -
Growth and characterization of CT(S,Se) thin films and Al/n-Si/p-CT(S,Se)/Mo heterojunction diode application employing a two-stage process
Bayazıt, Tuğba; Olgar, Mehmet Ali; Küçükömeroğlu, Tayfur; Bacaksız, Emin; Tomakin, Murat (Elsevier, 2023)Cu2SnS3 (CTS), Cu2Sn(S,Se)3 (CTSSe), and Cu2SnSe3 (CTSe) thin films were deposited on n-type silicon wafer substrates using a two-stage process. This process involved drop-coating Cu-Sn precursors, which is different from ... -
Growth and characterization of Cu2SnS3 (CTS), Cu2SnSe3 (CTSe), and Cu2Sn(S,Se)(3) (CTSSe) thin films using dip-coated Cu-Sn precursor
Bayazıt, Tuğba; Olgar, Mehmet Ali; Küçükömeroğlu, Tayfur; Bacaksız, Emin; Tomakin, Murat (Springer, 2019)Ternary compounds Cu2SnS3, Cu2SnSe3 and Cu2Sn(S,Se)(3) thin films used in thin film solar cell applications were prepared at the first time by such a two-stage process that includes dip-coating of Cu-Sn precursors as ... -
Growth of Cu2ZnSnS4 (CZTS) thin films using short sulfurization periods
Olgar, Mehmet Ali; Tomakin, Murat; Küçükömeroğlu, Tevfik; Bacaksız, Emin (Iop Publishing Ltd, 2019)In this study CZTS thin films were grown by a two-stage process that involved sequential sputter deposition of metallic Cu, Zn, and Sn layers on Mo coated glass substrates followed by RTP annealing at 530 and 560 degrees ... -
Hybrid transparent conductive electrode structure for solar cell application
Altuntepe, Ali; Olgar, Mehmet Ali; Erkan, Serkan; Hasret, Onur; Keçeci, Ahmet Emin; Kökbudak, Gamze; Tomakin, Murat; Seyhan, Ayşe; Turan, Raşit; Zan, Recep (Elsevier, 2021)This study draws on our experiences with graphene to perform a hybrid TCO structure composed of AZO and graphene. We first set out to enhance the electrical and optical properties of AZO to enable its use especially in the ... -
Impact of in/ex situ annealing and reaction temperature on structural, optical and electrical properties of SnS thin films
Olgar, Mehmet Ali; Çiriş, Ali; Tomakin, Murat; Zan, Recep (Elsevier, 2021)In this work, SnS thin films were prepared by in situ and ex situ annealing process of precursor films deposited by RF (Radio Frequency) magnetron sputtering employing binary SnS target. In situ annealing treatment was ... -
Influence of copper composition and reaction temperature on the properties of CZTSe thin films
Olgar, Mehmet Ali; Atasoy, Yıldız; Başol, Bülent M.; Tomakin, Murat; Aygün, Gülnur; Özyüzer, Lütfi; Bacaksız, Emin (Elsevier Science Sa, 2016)In this study Cu2ZnSnSe4 (CZTSe) compound layers were grown using a two-stage technique that involved deposition of metallic precursors (Cu, Zn, and Sn) and Se in the first stage, followed by reaction of all the species ... -
Influence of deposition pressure of elemental Sn on structural, optical, electrical and schottky diode properties of SnS thin films grown by two-stage method
Çiriş, Ali; Atasoy, Yavuz; Tomakin, Murat; Olgar, Mehmet Ali (Springer, 2023)In the present study, SnS thin films were grown by two-stage method including sputtering deposition of elemental Sn films at various deposition pressures (6, 9, 12 ,15 and 18 mTorr) followed by sulfurization process carried ... -
Influence of pre-annealing Cu-Sn on the structural properties of CZTSe thin films grown by a two-stage process
Olgar, Mehmet Ali; Başol, Bülent M.; Tomakin, Murat; Seyhan, Ayşe; Bacaksız, Emin (Elsevier Sci Ltd, 2018)In this study CZTSe thin film were synthesized by a two-stage process that included sequential sputter deposition of Cu and Sn layers forming a Cu/Sn structure, pre-annealing the Cu/Sn structure at 200-380 degrees C for ... -
Performance of Si-based solar cell utilizing optimized Al-doped ZnO films as TCO layer
Altuntepe, Ali; Erkan, Serkan; Hasret, Onur; Yagmyrov, Atajan; Yazıcı, Duygu; Tomakin, Murat; Olgar, Mehmet Ali; Zan, Recep (Springer, 2023)luminum-doped zinc oxide (AZO) is one of the most popular transparent conducting oxide layers that can be employed in many optoelectronic applications in particular in photovoltaic devices due to being a low-cost and ... -
Phase transformation in Cu2SnS3 (CTS) thin films through pre-treatment in sulfur atmosphere
Olgar, Mehmet Ali; Başol, Bülent M.; Tomakin, Murat; Bacaksız, Emin (Springer, 2021)In this study, Cu2SnS3 (CTS) thin films prepared by a two-step sulfurization process were characterized. Cu and Sn metallic layers were first deposited on glass substrates by sputtering and then annealed in-situ while in ... -
Photodetector properties of CdSe thin films grown by close space sublimation method
Olgar, Mehmet Ali; Başol, Bülent M.; Polat, İsmail; Tomakin, Murat; Küçükömeroğlu, Tayfur; Bacaksız, Emin (Springer, 2023)In the present study, CdSe thin films were grown by Close Space Sublimation (CSS) method on glass substrates at elevated temperatures. The prepared films were analyzed through several characterization techniques such as ... -
Physical properties of CdS:Ga thin films synthesized by spray pyrolysis technique
Yılmaz, Salih; Polat, İsmail; Olgar, Mehmet Ali; Tomakin, Murat; Töreli, S. B.; Bacaksız, Emin (Springer, 2017)This paper reports the investigation of physical properties of CdS:Ga thin films grown for the first time by a simple spray pyrolysis method as a function of Ga-doping level from 0 to 8 at.%. X-ray diffraction (XRD), ...
