East European Journal of Physics最新文献_第2页

Influence of silicon characteristics on the parameters of manufactured photonics cells 硅特性对人造光子电池参数的影响

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East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-24

M. Kukurudziak, Volodymyr M. Lipka

{"title":"Influence of silicon characteristics on the parameters of manufactured photonics cells","authors":"M. Kukurudziak, Volodymyr M. Lipka","doi":"10.26565/2312-4334-2023-4-24","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-24","url":null,"abstract":"The paper investigates the influence of the electrophysical characteristics of silicon on the final parameters of photoelectronic elements using p-i-n photodiodes as an example. It has been found that photodiode samples made on the basis of silicon with a higher resistivity are more prone to the formation of inversion channels at the oxide-semiconductor interface. Also, the dark current and responsivity of such photodiodes reach saturation at a lower voltage. It has also been shown that silicon-based photodiodes with a longer lifetime of non-basic charge carriers have lower dark current values. It has been shown that products with crystallographic orientation [111] have a much lower density of surface dislocations after technological operations than in the case of silicon with orientation [100]. It was also found that materials with different crystallographic orientations have different phosphorus diffusion coefficients. It has been experimentally established that a silicon oxide film grows faster on the surface of crystallographic orientation silicon [111] than on the surface of crystallographic orientation silicon [100]. This is due to the difference in the surface density of silicon atoms inherent in different crystallographic planes.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":"55 6","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Heat Transfer Analysis on MHD Hybrid Nanofluid Flow Over a Porous Stretching Surface: An Application to Aerospace Features 多孔拉伸表面上 MHD 混合纳米流体流动的强化传热分析：航空特性应用

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East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-36

R. Chandra, Sekhar Reddy, G. Ramasekhar

{"title":"Enhanced Heat Transfer Analysis on MHD Hybrid Nanofluid Flow Over a Porous Stretching Surface: An Application to Aerospace Features","authors":"R. Chandra, Sekhar Reddy, G. Ramasekhar","doi":"10.26565/2312-4334-2023-4-36","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-36","url":null,"abstract":"The advancement of aircraft technology has presented manufacturers with new criteria and problems for the functioning of their devices. It is essential that, in order to guarantee the secure operation of aerospace machinery, the failure mechanisms be identified and the operational durability of critical structural components be improved as quickly as possible. New aviation materials have been developed in modern years. In an aviation engine, engine oil lubricates, cools, washes, maintains against rust, decreases sound, and accelerates. Most important is lubrication. All mechanical components would burn out if not maintained. The aim of this work is to minimize costs by extending the operational life of aircraft components (mechanical and motor parts) and enhancing fuel mileage and flying distance. Based on the importance of the inspiration on magnetohydrodynamic Aluminum Oxide-Cobalt hybrid nanofluid flow over a stretching surface (SS) in the existence of porous medium, and thermal radiation are investigated. In this model we used Engine oil mixed with Aluminum Oxide and Cobalt nanoparticles. By using the suitable self-similarity variables, the PDE is transformed into ODEs. After then, the dimensionless equations are solved by using the Maple built in BVP Midrich scheme. Graphs and tables explain how the operational factors affect fluid flow efficiency. Compared to nanofluids, hybrid nanofluids have a better heat transfer rate.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":"54 6","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum: First-Principles Calculation of Structural, Electronic, and Optical Properties of Cubic Perovskite CsPbF3 [East European Journal Of Physics. 3. 263-270 (2023)] 勘误：立方包晶 CsPbF3 结构、电子和光学特性的第一原理计算 [East European Journal Of Physics. 3. 263-270 (2023)]

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East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-49

Zozan Y. Mohammed, Sarkawt A. Sami, J. M. Salih

引用次数: 0

Assessment of Indoor Radon Gas Concentration in National Open University of Nigeria: A Case Study of Calabar Study Centre 尼日利亚国家开放大学室内氡气浓度评估：卡拉巴尔学习中心案例研究

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East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-47

Kolawole M. Lawal, E. Inyang, Efiong A. Ibanga, Funmilayo Ayedun

{"title":"Assessment of Indoor Radon Gas Concentration in National Open University of Nigeria: A Case Study of Calabar Study Centre","authors":"Kolawole M. Lawal, E. Inyang, Efiong A. Ibanga, Funmilayo Ayedun","doi":"10.26565/2312-4334-2023-4-47","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-47","url":null,"abstract":"The current work deals with indoor radon (222Rn) concentrations measurements in the Calabar Study Centre of the National Open University of Nigeria using a Corentium Arthings digital radon detector meter for seven days representing a short–term average measurement of indoor radon gas concentration level. The geographical coordinates were recorded using a hand-held geographical positioning system for the sample point. Measurement were taken for seven days and the following data where obtained 83±2.19 Bq/m3,80±3.69 Bq/m3,86±5.57 Bq/m3,84±1.59 Bq/m3,82±3.59 Bq/m3,81±4.89 Bq/m3 and 85 ±5.59 Bq/m3.The average radon(222Rn) concentration level was found to be 83 ± 3.87 Bq/m3 with a geometric mean of 82 ± 3.54 Bq/m3. It was observed that the radon concentration was below the reference level of 100 Bq/m3 recommended by the World Health Organization (WHO). Although the current exposure of members of the public to natural radiation is not critical, the situation could change abruptly when other activities commenced. The excess life time cancer risk calculated for 70 years, 60 years, 50 years, 40 years and 30 years were 1.72 × 10−3,1.65× 10−3,1.39× 10−3,1.44× 10−3 and 0.69× 10−3 respectively. The calculated values of the excess life time cancer risk are all higher than the set limit of 0.029 × 10−3 by International Commission on Radiological Protection. However, there are no observed cases of lung cancer epidemic in this Centre. Therefore, it is advised to use fans and effective ventilation techniques to reduce radon levels. Identifying the regions of the country where people are most at risk from radon exposure should be the main goal of any national radon policy.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":"66 2","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure Determination and Defect Analysis n-Si, p-Si Raman Spectrometer Methods 结构确定和缺陷分析 n-Si、p-Si 拉曼光谱仪方法

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-23

Khodjakbar S. Daliev, Sharifa B. Utamuradova, Zavkiddin E. Bahronkulov, Alisher Kh. Khaitbaev, Jonibek J. Hamdamov

引用次数: 0

Enhancing the Perfection of a Silicon Crystal Doped with Nickel and Zinc Impurities 提高掺杂镍和锌杂质的硅晶体的完美度

IF 0.4

East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-19

D. Esbergenov, E. M. Naurzalieva, Sabirbay A. Tursinbaev

{"title":"Enhancing the Perfection of a Silicon Crystal Doped with Nickel and Zinc Impurities","authors":"D. Esbergenov, E. M. Naurzalieva, Sabirbay A. Tursinbaev","doi":"10.26565/2312-4334-2023-4-19","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-19","url":null,"abstract":"This research paper presents the findings of an investigation into the interaction between zinc (Zn) and nickel (Ni) impurity atoms within a silicon (Si) matrix, which were doped sequentially in various combinations. The characterization techniques employed for this study encompass X-ray diffraction and IR-Fourier spectrometry. It is noteworthy that the degree of crystallinity exhibited by the silicon lattice, subject to the introduction of Zn and Ni impurities, is contingent upon the methodology employed for impurity incorporation. The results of this study reveal a distinctive trend in the optical properties of these doped silicon samples. Specifically, upon the introduction of Zn atoms into silicon that was pre-doped with Ni (Si), there is a concomitant reduction in the concentration of optically active oxygen atoms. Remarkably, this alteration in the dopant composition leads to a marked enhancement in the transparency of the silicon crystal. In stark contrast, when the doping sequence is reversed (Si Ni>), an opposing effect is observed, resulting in a diminishment of crystal transparency. These findings underscore the intricate interplay between the introduced impurity atoms, the dopant sequence, and their collective impact on the optical properties of the silicon matrix. Such insights contribute to our comprehension of the nuanced behavior of doped silicon and have implications for applications requiring tailored optical characteristics in semiconductor materials.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":"58 6","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the Properties of the Si-SiO2 Transition Layer in Multilayer Silicon Structures 论多层硅结构中二氧化硅-二氧化硅过渡层的特性

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East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-25

S. Daliev, F. A. Saparov

引用次数: 0

Capacitive Spectroscopy of Deep Levels in Silicon with Samarium Impurity 含钐杂质硅中深电平的电容光谱学

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East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-39

Sharifa B. Utamuradova, K. Daliev, S. Daliev, Uktam K. Erugliev

引用次数: 0

FLRW Universe in f(R,Lm) Gravity with Equation of State Parameter 带有状态方程参数的 f(R,Lm) 重力下的 FLRW 宇宙

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East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-48

B. K. Shukla, R. K. Tiwari, D. Sofuoğlu, A. Beesham

引用次数: 0

Design and Simulation of a Triple Absorber Layer Perovskite Solar Cell for High Conversion Efficiency 设计和模拟用于实现高转换效率的三吸收层 Perovskite 太阳能电池

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East European Journal of Physics Pub Date : 2023-12-02 DOI: 10.26565/2312-4334-2023-4-14

Abderrahim Yousfi, Okba Saidani, Z. Messai, Rafik Zouache, Mohamed Meddah, Younes Belgoumri

{"title":"Design and Simulation of a Triple Absorber Layer Perovskite Solar Cell for High Conversion Efficiency","authors":"Abderrahim Yousfi, Okba Saidani, Z. Messai, Rafik Zouache, Mohamed Meddah, Younes Belgoumri","doi":"10.26565/2312-4334-2023-4-14","DOIUrl":"https://doi.org/10.26565/2312-4334-2023-4-14","url":null,"abstract":"This paper presents a comprehensive simulation study on the influence of a triple absorber layer configuration in a perovskite-based solar cell using the SCAPS-1D software, under AM1.5 illumination. The simulated structure comprises a Cesium Tin-Germanium Triiodide (CsSn0.5Ge0.5I3) absorber layer sandwiched between Indium gallium zinc oxide (IGZO) and Cu2O layers. The main objective of this study is to enhance the power conversion efficiency (PCE) by optimizing the thicknesses of each layer. To validate our simulation results, we compare them with experimental data obtained from existing literature, and we observe a satisfactory agreement between the two. Our findings reveal that the maximum PCE of 28% can be achieved by utilizing specific thickness values for each layer. Specifically, the optimal thicknesses are determined to be 20 nm for the IGZO layer, 200 nm for the Cu2O layer, and 700 nm for the perovskite layer. These optimized thickness values lead to a significant improvement in the PCE of the solar cell, reaching 29%. This achievement highlights the effectiveness of our proposed triple absorber layer configuration and demonstrates its potential to enhance the overall performance of the perovskite-based solar cell. Overall, this study provides valuable insights into the optimization of the absorber layer configuration in perovskite solar cells, leading to improved power conversion efficiency.","PeriodicalId":42569,"journal":{"name":"East European Journal of Physics","volume":"20 6","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0