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1
The effect of sulphur amount in sulphurization stage on secondary phases in Cu2SnS3(CTS) films

Sozak Işil Merve Songür,Yorulmaz Uğur,Atay Ferhunde,Akyüz Idris 한국물리학회 2021 Current Applied Physics Vol.26 No.-
Cu2SnS3 is a promising absorber for green thin film solar cells because of its suitable optoelectrical properties and environment friendly components. In this study, CTS films were prepared by sulphurization of stacked metallic precursors deposited by thermal evaporation. Some physical properties were investigated by changing the amount of sulphur used in sulphurization stage. Highly crystalline tetragonal-CTS phase was obtained for all samples. However, Cu3SnS4 and CuS secondary phases were also determined at low amounts. Cu/Sn ratio approached to desired stoichiometry of CTS with increasing sulphur amount. Absorption spectra showed that there are two discrete absorption regions that are related to tetragonal-CTS and secondary phases. Thickness and optical constants were determined using spectroscopic ellipsometry. Atomic force microscope was used to evaluate the effects of sulphur amount on the morphology of CTS films. As a result, this study suggests a way of minimizing the secondary phases to obtain single phase tetragonal CTS.
2
The Behavior Rating Inventory of Executive Function and Continuous Performance Test in Preschoolers with Attention Deficit Hyperactivity Disorder

H. Tuna Cak,S. Ebru Cengel Kultur,Bahar Gokler,Ferhunde Oktem,Candan Taskiran 대한신경정신의학회 2017 PSYCHIATRY INVESTIGATION Vol.14 No.3
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  KCI
  
  스콜라
Objective-The aim of this study is to examine performance-based measures and behavioral ratings of executive functions (EF) as a component of preschool attention deficit hyperactivity disorder (ADHD). Methods-Twenty-one 4-to-6-year-old children with ADHD and 52 children with no psychopathology, matched on age, gender, socioeconomic status, and parental education, were enrolled. Parents were interviewed with the use of The Schedule for Affective Disorders and Schizophrenia for School-Age Children Present and Lifetime version. The Conners’ Kiddie Continuous Performance Test (K-CPT) was administered to the children, and the Behavior Rating Inventory of Executive Function-Preschool version (BRIEF-P) and the Conners’ Parent Rating Scale-Revised/Short Form (CPRS-R/S) were filled out by the parents. Results-All BRIEF-P and CPRS-R/S scores, the K-CPT measures of inattention and impulsivity were higher in the ADHD group. The CPRS-R/S ADHD index was strongly correlated with inhibition and related indexes in the BRIEF-P and was moderately correlated with inattention measures in the K-CPT. Conclusion-The current study is one of the few to investigate the features of preschool ADHD with the use of behavioral ratings of EF and a performance-based measure. Our results suggest that the BRIEF-P was able to identify behavioral difficulties in inhibition and working memory and that the K-CPT identified difficulties indicating inattention. The findings of this study support the use of a combination of methods for a complete evaluation of preschoolers with inattentive and hyperactive/impulsive behavior, the application of rating scales for screening ADHD symptoms, and the measurement of behavioral correlates of EF, along with performance-based measures.