Optimization of multiphase transport and deformation in novel baking process

Şumnu, Gülüm S.
Şahin, Serpil
Keskin, Semin Özge


Optimization of metalization in crystalline silicon solar cells
Demircioğlu, Olgu; Turan, Raşit; Ünalan, Hüsnü Emrah; Department of Micro and Nanotechnology (2012)
Production steps of crystalline silicon solar cells include several physical and chemical processes like etching, doping, annealing, nitride coating, metallization and firing of the metal contacts. Among these processes, the metallization plays a crucial role in the energy conversion performance of the cell. The quality of the metal layers used on the back and the front surface of the cell and the quality of the electrical contact they form with the underlying substrate have a detrimental effect on the amou...
Canar, Hasan Hüseyin; Turan, Raşit; Erçelebi, Ayşe Çiğdem; Department of Physics (2022-6)
PECVD deposited SiNx has been used in PV industry especially for PERC solar cell as anti-reflection coating (ARC) and passivating layer [1]. However, its limited optical and electrical properties create a barrier for achieving higher solar cell efficiencies. For that reason, an alternative is introduced that is SiOxNy thin film with adjustable refractive index can be tuned as low as SiO2 [2]. In this thesis, deposited SiNx and SiOxNy films were characterized by various measurement methods such as SE, FTIR,...
Optimization of open-tube furnace diffusion with Bbr3 liquid source for industrial p-type boron doping process
Orhan, Efe; Kökbudak, Gamze; Semiz, Emel; Es, Fırat; Turan, Raşit (Middle East Technical University; 2018-07-06)
In this study, optimization of boron emitter for n-type crystalline Si solar cells has been studied in detail. Industrial open-tube (atmospheric) furnace with BBr3 as liquid B source was utilized which is a preferred dopant for the diffusion process of n-type wafers in industry [1] [2]. During the processes, full boat (270 wafers) n-type square samples were used to investigate the uniformity from gas zone to door zone and inside the wafer. To achieve uniform boron emitters on large n-type substrates, parame...
Optimization of macrostructure in aluminium foams
Tan, Serdar; Öztürk, Tayfur; Department of Metallurgical and Materials Engineering (2003)
Pure aluminium and aluminium-5wt % TiO2 aluminium foams were produced by powder metallurgy technique with the use of TiH2 as foaming agent. Two sizes of TiH2 were used: 20æm and 3æm. It has been confirmed that high level of compaction is the primary requirement in foaming. It was shown that hot swaging could be used as a method of compaction for foaming as it leads to values close to full density. Pure aluminium foamed at 675°C and 725°C leads to a volume expansion between 90-180 %. A model was developed fo...
Optimization of mechanical and microstructural properties of weld joints between aluminium - magnesium and aluminium - magnesium - silicon alloys with different thicknesses
Ekşi, Murat; Ögel, Bilgehan; Batıgün, Caner; Department of Metallurgical and Materials Engineering (2012)
For the last decades usage of aluminium alloys have been increasing tremendously. They have been used in aerospace industry widely and now aluminium alloys are becoming more and more popular in automotive and defense industries. Consequently; successful welding of aluminium alloys gains importance. In this study a research is carried out on eldability of plates having different thicknesses of composition 5754 aluminium and 6063 aluminium in T-fillet geometry using Gas-metal Arc Welding technique. It was aim...
Citation Formats
G. S. Şumnu, S. Şahin, and S. Ö. Keskin, “Optimization of multiphase transport and deformation in novel baking process,” 2006. Accessed: 00, 2020. [Online]. Available: https://app.trdizin.gov.tr/publication/project/detail/TnpFd01qST0.