Pub Date : 2020-01-01DOI: 10.21272/jnep.12(6).06001
A. Boulgheb, M. Lakhdara, N. Kherief, S. Latreche
The main purpose of this paper is to determine the impact of germanium percentage within the base of a SiGe heterojunction bipolar transistor (HBT) in order to analyze the effect of the device self-heating. We use the COMSOL Multiphysics commercial software. The model links the semiconductor module to the HTS (Heat Transfer in Solids) module. This allows to simulate the temperature distribution across the SiGe HBT device for germanium levels ranging from x 10 %, 20 % to x 30 %. We first determine the static gain () of the SiGe HBT by varying the percentages of germanium. In addition, we analyze the heat distribution on the component surface for the three considered levels of germanium in order to record the maximum temperature Tmax in the device. Indeed, for x 10 %, the maximum temperature is Tmax 377 K and is close to the base-collector junction. When the germanium fraction in the SiGe alloy is increased (x 20 %), the maximum temperature of self-heating decreases (Tmax 366 K), while for x 30 % the temperature of self-heating decreases more (Tmax 354 K) and it spreads over the entire component. This phenomenon degrades seriously the electrical performances of the HBT.
{"title":"Analysis of Self-heating of a SiGe HBT Designed for RF Applications According to the Percentage of Germanium","authors":"A. Boulgheb, M. Lakhdara, N. Kherief, S. Latreche","doi":"10.21272/jnep.12(6).06001","DOIUrl":"https://doi.org/10.21272/jnep.12(6).06001","url":null,"abstract":"The main purpose of this paper is to determine the impact of germanium percentage within the base of a SiGe heterojunction bipolar transistor (HBT) in order to analyze the effect of the device self-heating. We use the COMSOL Multiphysics commercial software. The model links the semiconductor module to the HTS (Heat Transfer in Solids) module. This allows to simulate the temperature distribution across the SiGe HBT device for germanium levels ranging from x 10 %, 20 % to x 30 %. We first determine the static gain () of the SiGe HBT by varying the percentages of germanium. In addition, we analyze the heat distribution on the component surface for the three considered levels of germanium in order to record the maximum temperature Tmax in the device. Indeed, for x 10 %, the maximum temperature is Tmax 377 K and is close to the base-collector junction. When the germanium fraction in the SiGe alloy is increased (x 20 %), the maximum temperature of self-heating decreases (Tmax 366 K), while for x 30 % the temperature of self-heating decreases more (Tmax 354 K) and it spreads over the entire component. This phenomenon degrades seriously the electrical performances of the HBT.","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"25 1","pages":"06001-1-06001-5"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88738882","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}
Pub Date : 2020-01-01DOI: 10.21272/jnep.12(1).01017
C. Sheng, Y. M. Alrababah
In this work, room-temperature treated CdS nanoparticles were prepared in KOH solution via precipitation at different pH values by varying the ammonium nitrate (NH4NO3) concentration. The crystallite phase and size, surface morphology and infrared frequencies of functional groups were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy, respectively. The SEM images show that the CdS nanoparticles are spherical in shape. Meanwhile, the FTIR result reveals that a broad band occurred in the range of 400-700 cm − 1 could be attributed to the molecular bonding structure of CdS. The XRD patterns exhibit four well-resolved crystalline peaks that represents the diffraction planes of a cubic CdS phase. Nevertheless, a minor decrement in the intensity for both infrared and crystalline bands denotes a slight reduction in structure crystallinity and further indicates that a higher purity of finer CdS nanoparticles is obtained as the pH value decreases. Also, the diffraction peak becomes slightly widen that implies a decrease in the mean crystallite size as validated by Debye-Scherrer method. Owing to their unique nanostructural and morphological features, the CdS nanoparticles obtained in this study have potential applications in photonic devices, optoelectronics, photocatalysis and solar cells.
{"title":"The Role of pH on Infrared Spectral, Structural and Morphological Properties of Room-temperature Precipitated CdS Nanoparticles","authors":"C. Sheng, Y. M. Alrababah","doi":"10.21272/jnep.12(1).01017","DOIUrl":"https://doi.org/10.21272/jnep.12(1).01017","url":null,"abstract":"In this work, room-temperature treated CdS nanoparticles were prepared in KOH solution via precipitation at different pH values by varying the ammonium nitrate (NH4NO3) concentration. The crystallite phase and size, surface morphology and infrared frequencies of functional groups were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy, respectively. The SEM images show that the CdS nanoparticles are spherical in shape. Meanwhile, the FTIR result reveals that a broad band occurred in the range of 400-700 cm − 1 could be attributed to the molecular bonding structure of CdS. The XRD patterns exhibit four well-resolved crystalline peaks that represents the diffraction planes of a cubic CdS phase. Nevertheless, a minor decrement in the intensity for both infrared and crystalline bands denotes a slight reduction in structure crystallinity and further indicates that a higher purity of finer CdS nanoparticles is obtained as the pH value decreases. Also, the diffraction peak becomes slightly widen that implies a decrease in the mean crystallite size as validated by Debye-Scherrer method. Owing to their unique nanostructural and morphological features, the CdS nanoparticles obtained in this study have potential applications in photonic devices, optoelectronics, photocatalysis and solar cells.","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"11 1","pages":"01017-1-01017-4"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90501881","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}
Pub Date : 2020-01-01DOI: 10.21272/jnep.12(1).01013
V. Mandzyuk, I. Mironyuk, Y. Kulyk, N. A. Bezruka, Lviv Ukraine Mefodiy St.
{"title":"Structural-morphological and Conductive Properties of С-Al2O3 Composite Materials","authors":"V. Mandzyuk, I. Mironyuk, Y. Kulyk, N. A. Bezruka, Lviv Ukraine Mefodiy St.","doi":"10.21272/jnep.12(1).01013","DOIUrl":"https://doi.org/10.21272/jnep.12(1).01013","url":null,"abstract":"","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"61 1","pages":"01013-1-01013-6"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86636504","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}
Pub Date : 2020-01-01DOI: 10.21272/jnep.12(1).01006
R. Muminov, G. Ergashev, A. Saymbetov, Yo. K. Toshmurodov, S. Radzhapov, A. Mansurova, N. Japashov, Ye. A. Svanbayev
This paper describes the use of an additional inspection drift to improve the electro physical dimensions of a large-sized Si (Li) p-i-n structure.
本文介绍了使用额外的检测漂移来改善大尺寸Si (Li) p-i-n结构的电物理尺寸。
{"title":"Application of Additional Leveling Drift Process to Improve the Electrophysical Parameters of Large Sized Si (Li) p-i-n Structures","authors":"R. Muminov, G. Ergashev, A. Saymbetov, Yo. K. Toshmurodov, S. Radzhapov, A. Mansurova, N. Japashov, Ye. A. Svanbayev","doi":"10.21272/jnep.12(1).01006","DOIUrl":"https://doi.org/10.21272/jnep.12(1).01006","url":null,"abstract":"This paper describes the use of an additional inspection drift to improve the electro physical dimensions of a large-sized Si (Li) p-i-n structure.","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"26 1","pages":"01006-1-01006-5"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87116027","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}
Pub Date : 2020-01-01DOI: 10.21272/jnep.12(5).05034
Parisa Shirvani, H. Shirzadfar
Telemedicine is a form of remote medical practice using information and communication technologies which facilitates distance mediation between the patient and the medical staff. In rural or remote areas where many of the specialized medical services required by the community do not reach, telemedicine can be a viable and reliable alternative to facilitate access to these services as the use of telemedicine technology leads to higher levels of health care and treatment. As in telemedicine systems antennas have an important role, we focus on the optimal design of used antennas to achieve better results. The role of an antenna is to convert the electrical energy of a signal into electromagnetic energy, or conversely to convert electromagnetic energy into electrical energy. A transmitting antenna is a device that transmits energy between an emitter and the free space where this energy will propagate. The rapid development of wireless communication systems has led to numerous improvements in telecommunication antennas and systems to meet the needs of telemedicine applications. The microstrip patch antenna is a planar antenna that has received a lot of attention due to its flat geometry. These types of antennas are very popular among designers and are used in many applications. This paper presents an improved patch antenna and array antenna with microstrip feed line using three kinds of metamaterial (MTM) structures that can be very useful in telemedicine systems. A metamaterial is an artificial composite material with unnatural electromagnetic properties. Different structures are considered and analyzed to reach a good performance antenna. Proposed structures increase the gain of antennas which are used in telemedicine systems. The structures of the mushroom-like electromagnetic band gap (EBG), the one layer and two-layer woodpile EBG in straight and curved forms have been discussed and analyzed. The operating frequency is 2.45 GHz for telemedicine applications. The simulation process has been done through High Frequency Structure Simulator (HFSS) software and the results are compared.
{"title":"Gain Enhancement of Microstrip Patch Antenna and Array Antenna Using Different Metamaterial Structures for Telemedicine Applications","authors":"Parisa Shirvani, H. Shirzadfar","doi":"10.21272/jnep.12(5).05034","DOIUrl":"https://doi.org/10.21272/jnep.12(5).05034","url":null,"abstract":"Telemedicine is a form of remote medical practice using information and communication technologies which facilitates distance mediation between the patient and the medical staff. In rural or remote areas where many of the specialized medical services required by the community do not reach, telemedicine can be a viable and reliable alternative to facilitate access to these services as the use of telemedicine technology leads to higher levels of health care and treatment. As in telemedicine systems antennas have an important role, we focus on the optimal design of used antennas to achieve better results. The role of an antenna is to convert the electrical energy of a signal into electromagnetic energy, or conversely to convert electromagnetic energy into electrical energy. A transmitting antenna is a device that transmits energy between an emitter and the free space where this energy will propagate. The rapid development of wireless communication systems has led to numerous improvements in telecommunication antennas and systems to meet the needs of telemedicine applications. The microstrip patch antenna is a planar antenna that has received a lot of attention due to its flat geometry. These types of antennas are very popular among designers and are used in many applications. This paper presents an improved patch antenna and array antenna with microstrip feed line using three kinds of metamaterial (MTM) structures that can be very useful in telemedicine systems. A metamaterial is an artificial composite material with unnatural electromagnetic properties. Different structures are considered and analyzed to reach a good performance antenna. Proposed structures increase the gain of antennas which are used in telemedicine systems. The structures of the mushroom-like electromagnetic band gap (EBG), the one layer and two-layer woodpile EBG in straight and curved forms have been discussed and analyzed. The operating frequency is 2.45 GHz for telemedicine applications. The simulation process has been done through High Frequency Structure Simulator (HFSS) software and the results are compared.","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"30 1","pages":"05034-1-05034-5"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86172400","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}
Pub Date : 2020-01-01DOI: 10.21272/jnep.12(2).02019
P. Suthar, P. Gajjar
{"title":"Theoretical Study of Structural and Dynamical Properties of Liquid Ag74Ge26 Alloys Using Pseudopotential Method","authors":"P. Suthar, P. Gajjar","doi":"10.21272/jnep.12(2).02019","DOIUrl":"https://doi.org/10.21272/jnep.12(2).02019","url":null,"abstract":"","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"26 1","pages":"02019-1-02019-3"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86189385","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}
Pub Date : 2020-01-01DOI: 10.21272/jnep.12(6).06007
A. Bandyopadhyay, K. Arun, A. Batra, M. Aggarwal
The sensitivity and performance of an integrated pyroelectric infrared detector depend not only on the material characteristics of a sensor element, but also on the thermal performance of the complete structure of detector design, including associated electronics. Thus, we have derived the thermal transfer function by solving the one-dimensional thermal diffusion equation for a single element n -layer structure, from which the performance of the detector structure of any number of layers can be obtained, predicted and optimized. Various single sensor configurations on the flexible substrate, polyimide, and pyroelectric and thermal parameters of modified lead strontium titanate (PST) film are utilized to predict the current re-sponsivity of an integrated detector system. The results obtained are compared with silicon as a substrate and found to be attractive for the development of a flexible thin-film based detector system
{"title":"Enhanced Performance of an Integrated Pyroelectric Infrared Detector on a Flexible Substrate: Modeling and Simulation","authors":"A. Bandyopadhyay, K. Arun, A. Batra, M. Aggarwal","doi":"10.21272/jnep.12(6).06007","DOIUrl":"https://doi.org/10.21272/jnep.12(6).06007","url":null,"abstract":"The sensitivity and performance of an integrated pyroelectric infrared detector depend not only on the material characteristics of a sensor element, but also on the thermal performance of the complete structure of detector design, including associated electronics. Thus, we have derived the thermal transfer function by solving the one-dimensional thermal diffusion equation for a single element n -layer structure, from which the performance of the detector structure of any number of layers can be obtained, predicted and optimized. Various single sensor configurations on the flexible substrate, polyimide, and pyroelectric and thermal parameters of modified lead strontium titanate (PST) film are utilized to predict the current re-sponsivity of an integrated detector system. The results obtained are compared with silicon as a substrate and found to be attractive for the development of a flexible thin-film based detector system","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82638703","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}
Pub Date : 2020-01-01DOI: 10.21272/jnep.12(6).06035
F. Brik, A. Labbani, Constantine Algeria Semiconductors
{"title":"Optimization of a Tunable Photonic Crystal Filter for Coarse Wavelength Division Multiplexing","authors":"F. Brik, A. Labbani, Constantine Algeria Semiconductors","doi":"10.21272/jnep.12(6).06035","DOIUrl":"https://doi.org/10.21272/jnep.12(6).06035","url":null,"abstract":"","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"25 1","pages":"06035-1-06035-4"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82786209","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}
Pub Date : 2020-01-01DOI: 10.21272/jnep.12(3).03023
C. Zegadi, Bp El-Mnaouer Oran Algeria Laboratoire de Micro et de Nanophysique, M. Adnane, D. Chaumont, A. Haichour, A. Kaddour, Z. Lounis, D. Ghaffor
1 Laboratoire de Micro et de Nanophysique (LaMiN), Ecole Nationale Polytechnique d’Oran Maurice AUDIN (ENPO-MA), BP 1523 El-Mnaouer, 31000 Oran, Algeria 2 Laboratory of Electron Microscopy and Materials Sciences, University of Science and Technology of Oran, P.O. Box 1505, El-Mnaouer, 31000 Oran, Algeria 3 Équipe NanoForm, Laboratoire ICB, Université de Bourgogne, 9, Ave Alain Savary, 21078 Dijon, France 4 Laboratory of LABMAT, National Polytechnic School of Oran, ENP OranMaurice AUDIN, Oran, Algeria
{"title":"Effect of Fe-incorporation on Structural and Optoelectronic Properties of Spin Coated p/n Type ZnO Thin Films","authors":"C. Zegadi, Bp El-Mnaouer Oran Algeria Laboratoire de Micro et de Nanophysique, M. Adnane, D. Chaumont, A. Haichour, A. Kaddour, Z. Lounis, D. Ghaffor","doi":"10.21272/jnep.12(3).03023","DOIUrl":"https://doi.org/10.21272/jnep.12(3).03023","url":null,"abstract":"1 Laboratoire de Micro et de Nanophysique (LaMiN), Ecole Nationale Polytechnique d’Oran Maurice AUDIN (ENPO-MA), BP 1523 El-Mnaouer, 31000 Oran, Algeria 2 Laboratory of Electron Microscopy and Materials Sciences, University of Science and Technology of Oran, P.O. Box 1505, El-Mnaouer, 31000 Oran, Algeria 3 Équipe NanoForm, Laboratoire ICB, Université de Bourgogne, 9, Ave Alain Savary, 21078 Dijon, France 4 Laboratory of LABMAT, National Polytechnic School of Oran, ENP OranMaurice AUDIN, Oran, Algeria","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"26 1","pages":"03023-1-03023-6"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81050513","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}
Pub Date : 2020-01-01DOI: 10.21272/jnep.12(4).04017
M. Veerabhadrayya, R. Kumari, G. Nagaraju, Udayabhanu Udayabhanu, Y. T. Ravikiran, B. Chethan, Tumakuru India. Commerce
{"title":"Structural, Optical and Electrical Properties of Ce Doped SnO2 Nanoparticles Prepared by Surfactant Assisted Gel Combustion Method","authors":"M. Veerabhadrayya, R. Kumari, G. Nagaraju, Udayabhanu Udayabhanu, Y. T. Ravikiran, B. Chethan, Tumakuru India. Commerce","doi":"10.21272/jnep.12(4).04017","DOIUrl":"https://doi.org/10.21272/jnep.12(4).04017","url":null,"abstract":"","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"32 4 1","pages":"04017-1-04017-6"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83643118","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}
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