Center for Solar Energy Research and Applications (GÜNAM), Article

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Publication (17)

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Turan, Raşit (10)
Ünal, Mustafa (5)
Ameri, Mohsen (3)
Mohajerani, Ezeddin (3)
Çiftpınar, Emine Hande (3)

Electrical and Electronic Engineering (6)
Electronic, Optical and Magnetic Materials (6)
Condensed Matter Physics (5)
General Materials Science (3)
Renewable Energy, Sustainability and the Environment (3)

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2011 - 2020 (17)

Recent Submissions

Implementation of generalized Harvey-Shack theory in light scattering from rough surfaces
Gunoven, M.; Nasser, H.; Ünal, Mustafa; Aytekin, O.; Turan, Raşit; Bek, Alpan (2020-12-01)
We present a discrete implementation of generalized Harvey-Shack scalar scattering theory to calculate angular intensity distributions from height profiles of select randomly textured surfaces proposed for use in solar cel...
On the application of hole-selective MoOx as full-area rear contact for industrial scale p-type c-Si solar cells
Nasser, Hisham; Es, Fırat; Zolfaghari Borra, Mona; Semiz, Emel; Kokbudak, Gamze; Orhan, Efe; Turan, Raşit (Wiley, 2020-11-01)
We present the feasibility of integrating substoichiometric molybdenum oxide (MoOx) as hole-selective rear contact into the production sequence of industrial scale p-type crystalline silicon (c-Si) solar cells. Thin films ...
Angular Dependence of Solar Cell Parameters in Crystalline Silicon Solar Cells Textured with Periodic Array of Microholes
Altinoluk, Serra; Kumar, Naveen; Çiftpınar, Emine Hande; Demircioglu, O.; Turan, Raşit; Vasileska, Dragica (2020-09-01)
Surface texturing is an indispensable way of increasing absorption in solar cells. In order to properly characterize the effect of texturing, the angular dependence of the incidence light should be addressed. This is parti...
Solvent selection for fabrication of low temperature ZnO electron transport layer in perovskite solar cells
Ahmadi, S. Hamideh; Ghaffarkani, Mashhood; Ameri, Mohsen; Safari, Nasser; Mohajerani, Ezeddin (Elsevier BV, 2020-08-01)
Zinc Oxide (ZnO) with an easy synthesis method, low processing temperature, and high charge carrier mobility has been considered as a proper electron transport layer (ETL) for perovskite solar cells. Herein, we investigate...
Ultra-High Precision Radiation Dosimetry via Laser Bleaching the Color Centers in Fast Recovery Optical Fiber Sensors
Ghahrizjani, Reza Taheri; Ameri, Mohsen; Jahanbakhsh, Hossein; Sadeghi, Hossein; Mohajerani, Ezeddin (Institute of Electrical and Electronics Engineers (IEEE), 2020-06-01)
High energy electromagnetic radiation or heavy charged particles are extensively used for medical treatment of certain cancers. Precise prediction or measurements of energy deposition of any types of radiation on tissue is...
Phenomenological morphology design of hybrid organic-inorganic perovskite solar cell for high efficiency and less hysteresis
Ameri, Mohsen; Ghaffarkani, Mashhood; Ghahrizjani, Reza Taheri; Safari, Nasser; Mohajerani, Ezeddin (Elsevier BV, 2020-02-01)
In this report, a modeling approach is employed to study the effect of the grain boundaries (GBs) and their electronic activity on the performance parameters of the perovskite solar cells (PSCs). Our model is based on the ...
Enhanced metal assisted etching method for high aspect ratio microstructures: Applications in silicon micropillar array solar cells
Baytemir, Gulsen; Çiftpınar, Emine Hande; Turan, Raşit (Elsevier BV, 2019-12-01)
A solar cell device, fabricated on high density array cylindrical pillars, enables photogenerated carrier collection in the radial direction, thus shortening the path length of the carriers reaching the junction. It also p...
Electrical, optical and surface characterization of reactive RF magnetron sputtered molybdenum oxide films for solar cell applications
Mehmood, Haris; Bektaş, Gence; Yıldız, İlker; Tauqeer, Tauseef; Nasser, Hisham; Turan, Raşit (Elsevier BV, 2019-10-01)
Thin films of molybdenum oxide (MoOx) were fabricated by radio frequency (RF) reactive magnetron sputtering technique with various oxygen flow rates and the deposition pressure fixed at 4 mTorr. The stoichiometry, composit...
Alternative HF-free etching solution for aluminum induced texturing of glass surface with improved haze
Ünal, Mustafa; TANKUT, Aydın; Turan, Raşit (IOP Publishing, 2019-08-01)
Aluminum induced texturing (AIT) is a promising surface conditioning method applied on glass substrates. In conventional AIT process, the reaction products (i.e., Al2O3 and Si) are stripped off the glass surface using an H...
Mechanical and optical properties of SiO2 thin films deposited on glass
Simurka, Lukas; Ctvrtlik, Radim; Tomastik, Jan; Bektaş, Gence; Svoboda, Jan; Bange, Klaus (2018-09-01)
The optical and mechanical properties of amorphous SiO2 films deposited on soda-lime silicate float glass by reactive RF magnetron sputtering at room temperature were investigated in dependence of the process pressure. The...
Direct growth of type II InAs/GaSb superlattice MWIR photodetector on GaAs substrate
SERİNCAN, UĞUR; Arikan, Bulent; Senel, Onur (Elsevier BV, 2018-08-01)
We report on the direct growth and characterization of type-II InAs/GaSb superlattice (T2SL) MWIR photodetector structure grown on a GaAs substrate by molecular beam epitaxy. The designed photodetector structure contains 1...
Performance evaluation of InAs/GaSb superlattice photodetector grown on GaAs substrate using AlSb interfacial misfit array
Korkmaz, Melih; Arikan, Bulent; Suyolcu, Y. Eren; ASLAN, BÜLENT; SERİNCAN, UĞUR (IOP Publishing, 2018-03-01)
We report on the growth and opto-electronic characterization of type-II InAs/GaSb superlattice (SL) mid-wavelength infrared pin photodetector grown on a GaAs substrate. AlSb interfacial misfit array was employed at the GaA...
An X-ray photoelectron spectroscopy study on the annealing effects for Al/glass Interface during aluminum induced texturing process
Ünal, Mustafa; Tankut, Aydin; Yıldız, İlker; Sokmen, Ilkay; Turan, Raşit (2017-10-31)
The aluminum induced texturing method offers an effective light trapping scheme by random texture that is formed by U-shaped craters on the glass surface. The texture is mainly shaped by the reaction between Al and SiO2. H...
Near-unity haze by aluminum induced glass texturing: structural evolution of Al/glass interface and its impact on texturing
Ünal, Mustafa; Tankut, Aydin; Canlı, Sedat; Turan, Raşit (2017-09-01)
Aluminum induced texturing (AIT) is an effective method to enhance light trapping in thin film solar cells through texturing the surface of the glass substrate. The topography of the textured glass is closely related to th...
Aluminum induced texturing of sandy and prism glasses: Combination of micro/nano texture with macro texture
Ünal, Mustafa; Demircioglu, Zeynep; Donerscark, Ergi; Ozkol, Engin; Turan, Raşit (2017-08-01)
Aluminum induced texturing (AIT) is one of the most promising texturing methods, which can be applied on glass substrates for solar cell applications. Combination of different dimensional structures exhibits the opportunit...
Performance of solar cells fabricated on black multicrystalline Si by nanowire decoration
Es, Fırat; Çiftpınar, Emine Hande; Demircioğlu, Olgu; Günöven, Mete; Kulakci, Mustafa; Turan, Raşit (2015-03-30)
Vertically aligned Si nanowire (NW) arrays fabricated by metal-assisted etching technique were applied to industrial sized (156 mm x 156 mm) multicrystalline Si cells as an anti-reflective (AR) medium. The NW lengths (betw...
Forward and reverse bias current-voltage characteristics of Au/n-Si Schottky barrier diodes with and without SnO2 insulator layer
GÖKÇEN, MUHARREM; ALTINDAL, ŞEMSETTİN; Karaman, M.; Aydemir, U. (Elsevier BV, 2011-11-01)
The effects of interfacial insulator layer, interface states (N-ss) and series resistance (R-s) on the electrical characteristics of Au/n-Si structures have been investigated using forward and reverse bias current-voltage ...