NiOx Improved with Li/Mg Doping

This study was financially supported by the Dokuz Eylul University, the Scientific Research Projects Coordinatorship with the project code 2019.KB.MLT.004. The authors are indebted to the infrastructural support from Dokuz Eylül University, the Center for Production and Applications of Electronic Materials (EMUM), Department of Metallurgical and Materials Engineering, Yıldız Technical University Department of Physics, and Universidade Nova de Lisboa, Centro de Investigação em Materiais (CENIMAT) where research was carried out. S.A.A. acknowledges funding for a post‐doc scholarship from TUBİTAK (The Scientific and Technological Research Council of Türkiye, 2219) through grant 1059B192200308. The study was also partially supported by FCT (Fundação para a Ciência e Tecnologia, project M‐ECO2 (Industrial cluster for advanced biofuel production, ref. C644930471‐00000041) co‐financed by PRR − Recovery and Resilience Plan of the European Union (Next Generation EU). Publisher Copyright: © 2024 The Authors. Advanced Materials Technologies published by Wiley-VCH GmbH.Nickel oxide (NiOx) has received a lot of attention as an inorganic hole transport material (HTM) in perovskite solar cells (PSCs) during the last decade, owing to its high hole mobility, chemical stability, good optical transparency, and suitable energy levels that align with the valance band of the perovskite absorber methylammonium lead iodide (MAPbI3). This study explores Li and Mg co-doped NiOx thin films physically-deposited from developed sputtering targets obtained through cold isostatic pressing and sintering. After sputtering, the structural, elemental, morphological, optical, and electrical properties of the layers are investigated by XRD, XPS, SEM, AFM, UV–vis spectrophotometer, and Hall-effect; revealing that crystalline, homogeneous, and smooth films are obtained. In particular, improvements in mobility and conductivity values are observed with Li and Mg doping, which contribute to enhanced PSC performance when used as an HTM layer in the glass-indium tin oxide (ITO)/NiOx-based HTM/MAPbI3/phenyl butryic acid methyl ester (PCBM)/bathocuproine (BCP)/Ag architecture. The champion solar cell achieves PCE of 15.52%. In addition, the average values of all samples are boosted, JSC (from 13.21 to 15.60 mA cm−2) and FF (from 59.32% to 67.7%), relative to pristine HTM, resulting in a pronounced PCE increment of up to 30% with the HTM film sputtered by a single target of co-doped material.publishersversionpublishe

Laboratuvardan Kliniğe Transplantasyon Pratiği

Transplantasyon; Temel Tıbbi Bilimler, Moleküler Tıp, Genetik ve İmmünolojiden klinik uygulamalardan destek alan multidisipliner bir tıp dalıdır. Temel bilimlerdeki başarılı çalışmaların kliniğe uygulanması, klinikte karşılaşılan sorunların da, oluşturulan deneysel hayvan modellerinde irdelenmesi, elde edilen bilgilerin klinik uygulamalara aktarılması; diğer deyişle tecrübelerin “Translational” özellikli olması günümüz transplantasyon çalışmalarında bir gerekliliktir. İmmün sistemin bileşenlerinin ve reaksiyonlarının iyi bilinmesi, hücreler arası ilişkilerde greftin reddi ya da kabul edilmesinin şartlarını doğru anlamak ve uygun laboratuvar yöntemleri ile klinik durumun aydınlatılması transplantasyonda stratejik önemdedir. Bu nedenle, klinik transplantasyon çalışmaları yapanlar temel bilimler bilgileri ile de donanımlı olmalıdırlar. Multidisipliner bir dal olma bilinci ile yapılan klinik transplantasyon çalışmalarında başarı yakalanmaktadır. Laboratuvardan Kliniğe Transplantasyon kitabımızda tüm yönleri ile transplantasyonun organizmaya etkileri ve bunların klinik sonuçlarını, çalışmalarımızın ışığında sunmayı ve tartışmayı hedefledik. Editör: Prof.Dr. Mesut İzzet TİTİZ Yardımcı Editör: Doç.Dr. Pınar AT

BANKING SECTOR OF TURKEY: ANY LESSONS FROM THE CRISIS?

The banking sector of Turkey faced a financial crisis that resulted in the closure of many banks in 2001. Transition to Strong Economy program put into effect for making structural changes in the financial system after the crisis and practices for financial stability was implemented by the Central Bank in the years following. This study aims to reveal descriptively effects of Transition to Strong Economy Program (GEGP) in the last 15 years and later on, policies executed intend to financial stability on banking system on the basis of banking sector indicators

Synthesis, structural and optical characterization of Nd: YAG powders via flame spray pyrolysis

In this study, undoped Y3Al5O12 (YAG) and neodymium (Nd3+) doped (Nd: YAG) powders were synthesized by Flame Spray Pyrolysis (FSP) for the first time in literature. The synthesized powders were investigated about structural, morphological, elemental and optical properties by using Thermogravimetric - Differential Thermal Analysis (DTA-TG), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Fourier Transformed Infrared Spectroscopy (FTIR), and photoluminescence spectroscopy (PL). The particle size range of undoped and Nd doped YAG powders produced by the FSP method was determined around 200-1100 nm. After calcination at 1000 degrees C, cubic YAG crystalline phases were successfully observed. The luminescence results as excitation, emission, and upconversion properties have been investigated for both undoped YAG (YG) and Nd3+ doped YAG with different dopant ratios as 1% (YG1), 3% (YG3) and %5 (YG5). When synthesized powders excited at 460 nm, the emission maxima observed at 540 nm and 808 nm. All YAG powders yielded bi-exponential decay curves. The highest decay time value was 1% Nd: YAG particle at 277 mu s. Furthermore, these powder

The effect of physicians' awareness on influenza and pneumococcal vaccination rates and correlates of vaccination in patients with diabetes in Turkey An epidemiological Study "diaVAX"

We aimed to examine the effect of increased physician awareness on the rate and determinants of influenza and pneumococcal vaccinations in diabetic patients. Diabetic patients (n = 5682, mean [SD] age: 57.3 [11.6] years, 57% female) were enrolled by 44 physicians between Sept 2010 and Jan 2011. The physicians were initially questioned regarding vaccination practices, and then, they attended a training program. During the last five years, the physicians recommended influenza and pneumococcal vaccinations to 87.9% and 83.4% of the patients, respectively; however; only 27% of the patients received the influenza and 9.8% received the pneumococcal vaccines. One year after the training, the vaccination rates increased to 63.3% and 40.7%, respectively. The logistic regression models revealed that variables which increased the likelihood of having been vaccinated against influenza were: longer duration of diabetes, presence of hyperlipidemia and more use of concomitant medications whereas more use of anti-hyperglycemic medications was associated with increased odds of vaccination. On the other hand, older age, longer duration of diabetes and presence of a cardiovascular disease were variables which decreased the likelihood of having been vaccinated against pneumococcal disease during the past five years. However, during the study period, variables which decreased the odds of having been vaccinated included: older age and anti-hyperglycemic medications for influenza, and presence of hyperlipidemia and a family history of hypertension for pneumococcal disease. While variables which increased the likelihood of vaccination in the same period were: increased number of co-morbidities for influenza, and family history of diabetes for pneumococcal disease. We conclude that increased awareness of physicians may help improve vaccination rates against influenza and pneumococcal disease. However, diabetic patients with more severe health conditions are less likely to having been vaccinated. More structural/systematic vaccination programs are needed to increase the vaccination rates in patients with diabetes

Synthesis and spectral characterization of Sr4Al14O25:Eu2+/Dy3+ blue-green phosphorous powders by sol-gel method

Highly intense, long persistent Sr4Al14O25:Eu2+/Dy3+ phosphorous powders were prepared for the first time by sol-gel method under argon atmosphere. 2.5 mol% of H3BO3 was added as fluxing agent. Characterization of the powders was carried out by X-ray diffractometer (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The average particle size of the fabricated phosphor powders was found to be 460 nm in dispersed form in pure water. UV-Vis, steady-state and time resolved fluorescence spectroscopy techniques were used for spectral characterization of the powders. The phosphors exhibited two different emission bands at 449 and 550 nm upon excitation at 400 nm. It is observed that the position and the intensity of the emission band strongly depends on the excitation wavelength and shifts toward lower energy and intensity with increasing wavelength of the excition source. The broad band luminescence characteristics of the Sr4Al14O25:EU2+/Dy3+ were observed at 492 nm in the absence of the excitation source. The Sr4Al14O25:Eu2+/Dy3+ phosphor can be efficiently excited with the visible fraction of the light and show persistent luminescence, long and strong afterglow up to 35 min after removal of the excitation source. (C) 2015 Elsevier Ltd. All rights reserved