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Center for Solar Energy Research and Applications (GÜNAM)

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Publication (26)
Project (9)

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Author
Turan, Raşit (19)
Ünal, Mustafa (8)
Çiftpınar, Emine Hande (5)
Bek, Alpan (4)
Tankut, Aydin (4)

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

Date Issued
2011 - 2020 (35)

Recent Submissions

Integrating National Research Agendas on Solar Heat for Industrial Processes (INSHIP)
Baker, Derek Keıth(2020-12-31)
Despite process heat is recognized as the application with highest potential among solar heating and cooling applications, Solar Heat for Industrial Processes (SHIP) still presents a modest share of about 0.3% of total ins...
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...
Impacts of a photovoltaic power plant for possible heat island effect
Demirezen, Emre; Ozden, Talat; Akınoğlu, Bülent Gültekin (2018-07-06)
Today, solar energy conversion technologies take a significant place within the efforts of obtaining renewable and sustainable energy around the world, and show a rapid progress. One of the most common technologies is phot...
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 dopan...
The Status of MCT Detector Development at ASELSAN
Eker, Suleyman Umut; Kaldirim, Melih; Sasmaz, Emrah; Demircioğlu, Olgu; Tolunguc, Alp; Asici, Burak; San, Ayse; Barutcu, Berna; Eroglu, Huseyin Cuneyt; Ozer, Selcuk (2018-04-19)
ASELSAN A. S., the largest defense company in Turkey, initiated research activities on developing Mercury Cadmium Telluride (MCT) detectors in 2014. These research activities include bulk crystal growth and surface prepara...
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...
Lazer Kristalizasyon Yöntemi ile Yüksek Verimli İnce Film Kristal Si Güneş Gözesi Geliştirilmesi
Turan, Raşit; Bek, Alpan; Toffoli, Hande(2018)
Gerçeklestirdigimiz projede silisyum tabanlı polikristal-amorf silisyum ince film günes gözesiüretimine özellesmis bir lazerle kristalizasyon platformunun sanayi-üniversite isbirligisayesinde gelistirilmesi saglanmıstır. Y...
Heteroeklem Güneş Hücreleri için Elektron Geçirgen Tabaka Geliştirilmesi
Yerci, Selçuk; Yılmaz, Onur(2017-12-31)
Silisyumun alüminyum, boron gibi 3A grubu ve fosfor, arsenik gibi 5A grubu elementleri ile katkılanmasıyla homoeklem güneş hücreleri üretilebilir. Silisyum ve germanyum haricindeki güneş hücreleri heteroeklem yapı olarak a...
İnce film kristal silisyum heteroeklem üretimi
Bek, Alpan; Çınar, Kamil; Idikut, Firat; Birant, Gizem(2017-12-31)
Amorf silisyum (a-Si) n-tipi katkılı ince filmlerin plazma yardımlı kimyasal buhar biriktirme (PECVD) ve elektron demet buharlaştırma (e-beam) yöntemleri kullanılarak p tipi kristal Si (c-Si) üzerine kaplanmasıyla heteroek...
GÜNEŞ GÖZELERİNDE KULLANILMA AMAÇLI OLARAK, FARKLI PLAZMA DEŞARJLARDA TiOx, ve SiOx KAPLAMA YÖNTEMLERİNİN DENEYSEL ÇALIŞILMASI ve KARAKTERİZASYONLARI
Uzun Kaymak, İlker Ümit; Mansuroğlu, Doğan(2017-12-31)
Güneş enerjisi gözelerinde kullanılmak üzere silikon (Si) yüzey üzerine TiOx, ve SiOx tipi malzemelerin radyo frekanslı (RF) ya da direk akım(DC) tipi üretilen plazma deşarj yöntemleriyle farklı soy gazlar altında kaplanma...