Artificial Intelligence (AI) has become one of the most frequently used terms in the technical jargon (and often in not-so-technical jargon). Recent advancements in the field of AI have certainly contributed to the AI hype, and so have numerous applications and results of using AI technology in practice. Still, just like with any other hype, the AI hype has its controversies. This paper critically examines developments in the field of AI from multiple perspectives – research, technological, social and pragmatic. Part of the controversies of the AI hype stem from the fact that people use the term AI differently, often without a deep understanding of the wider context in which AI as a field has been developing since its inception in Mid 1950s.
{"title":"Is this artificial intelligence?","authors":"V. Devedzic","doi":"10.2298/fuee2004499d","DOIUrl":"https://doi.org/10.2298/fuee2004499d","url":null,"abstract":"Artificial Intelligence (AI) has become one of the most frequently used terms in the technical jargon (and often in not-so-technical jargon). Recent advancements in the field of AI have certainly contributed to the AI hype, and so have numerous applications and results of using AI technology in practice. Still, just like with any other hype, the AI hype has its controversies. This paper critically examines developments in the field of AI from multiple perspectives – research, technological, social and pragmatic. Part of the controversies of the AI hype stem from the fact that people use the term AI differently, often without a deep understanding of the wider context in which AI as a field has been developing since its inception in Mid 1950s.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"62 2 1","pages":"499-529"},"PeriodicalIF":0.6,"publicationDate":"2020-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87738507","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}
This paper presents the bibliographic review of smart systems implemented so far and their application. Also this paper is dedicated to new smart mobile system developed for monitoring microclimatic parameters. This system is primarily intended for monitoring real-time microclimatic parameters, such as air quality where the presence of carbon monoxide (CO) is monitored, as well as other microclimatic parameters. The mobile system which will be described in this manuscript can be installed in public transport (to obtain information on microclimatic parameters on a known route). Also, to obtain information on microclimatic parameters from a random route, it is possible to install the system in a taxi vehicle. This system provides the ability to generate a map using the data provided by the system based on GPS coordinates. The system is based on a group of embedded sensors, GPS module, PIC microcontroller as a core and server system, and wireless internet using Global System for Mobile Telecommunications (GSM) module with General Packet Radio Service (GPRS) as a communication protocol.
{"title":"A review of real time smart systems developed at University of Nis","authors":"D. Danković, M. Djordjevic","doi":"10.2298/fuee2004669d","DOIUrl":"https://doi.org/10.2298/fuee2004669d","url":null,"abstract":"This paper presents the bibliographic review of smart systems implemented so\u0000 far and their application. Also this paper is dedicated to new smart mobile\u0000 system developed for monitoring microclimatic parameters. This system is\u0000 primarily intended for monitoring real-time microclimatic parameters, such\u0000 as air quality where the presence of carbon monoxide (CO) is monitored, as\u0000 well as other microclimatic parameters. The mobile system which will be\u0000 described in this manuscript can be installed in public transport (to obtain\u0000 information on microclimatic parameters on a known route). Also, to obtain\u0000 information on microclimatic parameters from a random route, it is possible\u0000 to install the system in a taxi vehicle. This system provides the ability to\u0000 generate a map using the data provided by the system based on GPS\u0000 coordinates. The system is based on a group of embedded sensors, GPS module,\u0000 PIC microcontroller as a core and server system, and wireless internet using\u0000 Global System for Mobile Telecommunications (GSM) module with General Packet\u0000 Radio Service (GPRS) as a communication protocol.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"63 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76887598","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}
Graphene is the newest member of the multidimensional graphite carbon family. Graphene is a two-dimensional atomic crystal formed by the arrangement of carbon atoms in the hexagonal network. It is the most rigid and thinnest material ever discovered and has a wide range of uses regarding its unique characteristics. It is expected that this material will create a revolution in the electronics industry. Graphene is a very powerful superconductor as the movability of charged particles is high on it, and additionally, because of the high surface energy and ? electrons being free, graphene can be used in manufacturing many electronics devices. In this paper, the applications of graphene nanoparticles reinforced polymer nanocomposites in the computer and electronics industry are investigated. These nanoparticles have received much attention from researchers and craftsmen, because graphene has unique thermal, electrical and mechanical properties. Its use as a filler in very small quantities substantially enhances the properties of nanocomposites. There are various methods for producing graphene-reinforced polymer nanocomposites. These methods affect the amount of graphene dispersion within the polymer substrate and the final properties of the composite. The application and the properties of graphene-reinforced polymer nanocomposites are discussed along with examples of results published in the papers. To better understand such materials, the applications of these nanocomposites have been investigated in a variety of fields, including batteries, capacitors, sensors, solar cells, etc., and the barriers to the growth and development of these materials application as suggested by the researchers are discussed. As the use of these nanocomposites is developing and many researchers are interested in working on it, the need to study and deal with these substances is increasingly felt.
{"title":"Graphene-reinforced polymeric nanocomposites in computer and electronics industries","authors":"H. Kardanmoghaddam, MohamadReza Maraki, A. Rajaei","doi":"10.2298/fuee2003351m","DOIUrl":"https://doi.org/10.2298/fuee2003351m","url":null,"abstract":"Graphene is the newest member of the multidimensional graphite carbon family.\u0000 Graphene is a two-dimensional atomic crystal formed by the arrangement of\u0000 carbon atoms in the hexagonal network. It is the most rigid and thinnest\u0000 material ever discovered and has a wide range of uses regarding its unique\u0000 characteristics. It is expected that this material will create a revolution\u0000 in the electronics industry. Graphene is a very powerful superconductor as\u0000 the movability of charged particles is high on it, and additionally, because\u0000 of the high surface energy and ? electrons being free, graphene can be used\u0000 in manufacturing many electronics devices. In this paper, the applications\u0000 of graphene nanoparticles reinforced polymer nanocomposites in the computer\u0000 and electronics industry are investigated. These nanoparticles have received\u0000 much attention from researchers and craftsmen, because graphene has unique\u0000 thermal, electrical and mechanical properties. Its use as a filler in very\u0000 small quantities substantially enhances the properties of nanocomposites.\u0000 There are various methods for producing graphene-reinforced polymer\u0000 nanocomposites. These methods affect the amount of graphene dispersion\u0000 within the polymer substrate and the final properties of the composite. The\u0000 application and the properties of graphene-reinforced polymer nanocomposites\u0000 are discussed along with examples of results published in the papers. To\u0000 better understand such materials, the applications of these nanocomposites\u0000 have been investigated in a variety of fields, including batteries,\u0000 capacitors, sensors, solar cells, etc., and the barriers to the growth and\u0000 development of these materials application as suggested by the researchers\u0000 are discussed. As the use of these nanocomposites is developing and many\u0000 researchers are interested in working on it, the need to study and deal with\u0000 these substances is increasingly felt.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"53 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88112704","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}
Hitherto described microwave modalities for detection of internal inhomogeneities in human tissues such as breasts and heads are by image reconstruction, requiring time-consuming computational resources. The method developed at MDH is instead based on the use of a magnetic field transducer, creating an essentially circular electrical field. This is in turn diffracted by the dielectric inhomogenity and that signal is received by an E-field sensor in an appropriate position. The transmitting applicator is unique by no need to contact the object under study (OUS) and does not generate any surface waves at it. The primary field has properties behaving as coming from a magnetic monopole. The receiving 3D contacting applicator contains a high-permittivity ceramic and is resonant in order to provide the desired field polarisation sensitivity. The desired system properties are achieved by optimized use of the orthogonality properties of the primary magnetic, induced electric, and diffracted electric fields. Key words: Diffraction, magnetic field, applicator, internal inhomogeneity.
{"title":"Various diffraction effects and their importance for detection of inhomogeneites in human tissues","authors":"N. Petrovic, P. Risman","doi":"10.2298/fuee2003445p","DOIUrl":"https://doi.org/10.2298/fuee2003445p","url":null,"abstract":"Hitherto described microwave modalities for detection of internal\u0000 inhomogeneities in human tissues such as breasts and heads are by image\u0000 reconstruction, requiring time-consuming computational resources. The method\u0000 developed at MDH is instead based on the use of a magnetic field transducer,\u0000 creating an essentially circular electrical field. This is in turn\u0000 diffracted by the dielectric inhomogenity and that signal is received by an\u0000 E-field sensor in an appropriate position. The transmitting applicator is\u0000 unique by no need to contact the object under study (OUS) and does not\u0000 generate any surface waves at it. The primary field has properties behaving\u0000 as coming from a magnetic monopole. The receiving 3D contacting applicator\u0000 contains a high-permittivity ceramic and is resonant in order to provide the\u0000 desired field polarisation sensitivity. The desired system properties are\u0000 achieved by optimized use of the orthogonality properties of the primary\u0000 magnetic, induced electric, and diffracted electric fields. Key words:\u0000 Diffraction, magnetic field, applicator, internal inhomogeneity.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"167 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80540348","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}
M. Mileusnic, P. Petrovic, V. Kosjer, A. Lebl, B. Pavić
In this paper we compared the time required for the successful jamming of remote controlled improvised explosive devices activation using active and responsive jamming methods. As a representative of active jamming method we analyzed jamming signal generation using frequency sweep. For the analysis of the possible activating signal presence based on responsive jamming procedures we first supposed Fast Fourier Transform (FFT) implementation and compared its analysis rate to the rate of sweep jamming. Taking into account the current technology state, it is proved that the time required to achieve the successful jamming relied on FFT analysis may be less than in the case of active sweep jamming. After that we considered pros and cons for energy detector and matched filter detector implementation in responsive jamming. For these two detector types it is shown how to determine the number of analysis blocks to achieve approximately the same number of collected samples as in the case of FFT implementation, starting from the probabilities of false detection and miss of detection.
{"title":"Reliability analysis of different RCIED activation signal responsive jamming techniques and their comparison to active jamming","authors":"M. Mileusnic, P. Petrovic, V. Kosjer, A. Lebl, B. Pavić","doi":"10.2298/fuee2003459m","DOIUrl":"https://doi.org/10.2298/fuee2003459m","url":null,"abstract":"In this paper we compared the time required for the successful jamming of\u0000 remote controlled improvised explosive devices activation using active and\u0000 responsive jamming methods. As a representative of active jamming method we\u0000 analyzed jamming signal generation using frequency sweep. For the analysis\u0000 of the possible activating signal presence based on responsive jamming\u0000 procedures we first supposed Fast Fourier Transform (FFT) implementation and\u0000 compared its analysis rate to the rate of sweep jamming. Taking into account\u0000 the current technology state, it is proved that the time required to achieve\u0000 the successful jamming relied on FFT analysis may be less than in the case\u0000 of active sweep jamming. After that we considered pros and cons for energy\u0000 detector and matched filter detector implementation in responsive jamming.\u0000 For these two detector types it is shown how to determine the number of\u0000 analysis blocks to achieve approximately the same number of collected\u0000 samples as in the case of FFT implementation, starting from the\u0000 probabilities of false detection and miss of detection.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"47 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91039180","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}
F. Tahiri, A. Harrouz, D. Belatrache, F. Bekraoui, Ouledali Omar, I. Boussaid
The present paper is a part of the study of Direct Torque Control based (DTC) on space vector modulation using predictive controller (Predictive SVM) of a permanent magnet synchronous motor (PMSM) powered by a photovoltaic (PV) source. In the conventional direct torque control (DTC) of a permanent magnet synchronous motor (PMSM), hysteresis controllers are used to choose the proper voltage vector resulting in large torque ripples. The direct torque control can accelerate the torque responses but increases the torque ripple at same time. Nowadays, exist some other alternative approaches to reduce the torque ripples based on (Predictive SVM) technique. This method is based on the replacement of hysteresis comparators (used in conventional DTC) by Proportional Integral (PI) regulators and the selection table by space vector modulation (SVM). The simulation results confirm that this proposed method where the control of the switching frequency is well controlled, allows us to reduce the oscillations of the electromagnetic torque and flux by 20 % and 30%, respectively with a good dynamic response compared with conventional DTC.
{"title":"Technique of control PMSM powered by PV panel using predictive controller of DTC-SVM","authors":"F. Tahiri, A. Harrouz, D. Belatrache, F. Bekraoui, Ouledali Omar, I. Boussaid","doi":"10.2298/fuee2003429t","DOIUrl":"https://doi.org/10.2298/fuee2003429t","url":null,"abstract":"The present paper is a part of the study of Direct Torque Control based (DTC)\u0000 on space vector modulation using predictive controller (Predictive SVM) of a\u0000 permanent magnet synchronous motor (PMSM) powered by a photovoltaic (PV)\u0000 source. In the conventional direct torque control (DTC) of a permanent\u0000 magnet synchronous motor (PMSM), hysteresis controllers are used to choose\u0000 the proper voltage vector resulting in large torque ripples. The direct\u0000 torque control can accelerate the torque responses but increases the torque\u0000 ripple at same time. Nowadays, exist some other alternative approaches to\u0000 reduce the torque ripples based on (Predictive SVM) technique. This method\u0000 is based on the replacement of hysteresis comparators (used in conventional\u0000 DTC) by Proportional Integral (PI) regulators and the selection table by\u0000 space vector modulation (SVM). The simulation results confirm that this\u0000 proposed method where the control of the switching frequency is well\u0000 controlled, allows us to reduce the oscillations of the electromagnetic\u0000 torque and flux by 20 % and 30%, respectively with a good dynamic response\u0000 compared with conventional DTC.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"53 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90468354","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}
Power transformers are constantly exposed to mechanical, thermal and electrical stresses during operation. In this paper, the authors propose an improved aging model of power transformers by adding the impact of mechanical deteriorations. In the current practice, the mechanical deformation and dislocation of the windings and core are not sufficiently distinguished as components that influence the aging of the transformer. Hence, the current aging model was expanded with a functional block that contains several typical failures in order to emphasize their impact on the lifetime of transformers and their aging as well. The authors used the Frequency Response Analysis (FRA) method for the fault detection and location of the mechanical deformations of its active parts. The correlation function is used to determine the level of the detected failure. All presented test results are obtained in real exploitation conditions.
{"title":"Fault detection using FRA in order to improve the aging model of power transformer","authors":"S. Milić, D. Ilić, M. Ponjavic","doi":"10.2298/fuee2003413m","DOIUrl":"https://doi.org/10.2298/fuee2003413m","url":null,"abstract":"Power transformers are constantly exposed to mechanical, thermal and\u0000 electrical stresses during operation. In this paper, the authors propose an\u0000 improved aging model of power transformers by adding the impact of\u0000 mechanical deteriorations. In the current practice, the mechanical\u0000 deformation and dislocation of the windings and core are not sufficiently\u0000 distinguished as components that influence the aging of the transformer.\u0000 Hence, the current aging model was expanded with a functional block that\u0000 contains several typical failures in order to emphasize their impact on the\u0000 lifetime of transformers and their aging as well. The authors used the\u0000 Frequency Response Analysis (FRA) method for the fault detection and\u0000 location of the mechanical deformations of its active parts. The correlation\u0000 function is used to determine the level of the detected failure. All\u0000 presented test results are obtained in real exploitation conditions.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"9 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77601570","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}
V. Nguyen, Tien Minh Cao, Hung Nguyen, Hung Kim Le
This research has introduced the intelligent ANFIS-Online controller of STATCOM for improving the dynamic voltage on the power network under a 3-phase short circuit fault. The ANFIS-Online is made using an artificial neural network identifier. And based on the identifier, the premise and consequent parameters of ANFIS are adjusted timely. To demonstrate the performance of the suggested controller, the transient waves are shown to describe the effectiveness of the intelligent ANFIS-Online controller to enhance the transient response of the research system under a 3-phase short circuit fault. It's shown that the suggested intelligent ANFIS-Online controller has provided waves better than the other controllers such as ANFIS controller, ANFIS-PSO controller, ANFIS-GA controller for STATCOM equipment to enhance transient voltage stability.
{"title":"Using an intelligent ANFIS-Online controller for STATCOM in improving dynamic voltage stability","authors":"V. Nguyen, Tien Minh Cao, Hung Nguyen, Hung Kim Le","doi":"10.2298/fuee2003395n","DOIUrl":"https://doi.org/10.2298/fuee2003395n","url":null,"abstract":"This research has introduced the intelligent ANFIS-Online controller of\u0000 STATCOM for improving the dynamic voltage on the power network under a\u0000 3-phase short circuit fault. The ANFIS-Online is made using an artificial\u0000 neural network identifier. And based on the identifier, the premise and\u0000 consequent parameters of ANFIS are adjusted timely. To demonstrate the\u0000 performance of the suggested controller, the transient waves are shown to\u0000 describe the effectiveness of the intelligent ANFIS-Online controller to\u0000 enhance the transient response of the research system under a 3-phase short\u0000 circuit fault. It's shown that the suggested intelligent ANFIS-Online\u0000 controller has provided waves better than the other controllers such as\u0000 ANFIS controller, ANFIS-PSO controller, ANFIS-GA controller for STATCOM\u0000 equipment to enhance transient voltage stability.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"52 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84484746","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}
In recent years researchers have been focusing on the design of low power and small size oscillator for emerging areas of interest such as the internet of things (IoT) and biomedical applications. In this paper a new delay block for ring oscillator is proposed using CMOS inverter cascaded with inverted current starved inverter (CICSI). The designed delay block provides approximately 50% more delay with a smaller number of transistors than the conventionally designed circuits. Furthermore, a ring oscillator and a non-overlapping clock (NOC) generator are designed using it. The designed circuits can be used in switched capacitor (SC) circuits, analog mixed signal circuits to meet the need for low frequency portable biomedical applications. The designed circuits are simulated on Generic 90nm 1.2V Process Design Kit (GPDK90) using Cadence Virtuoso Design Environment. The simulation result shows the delay of the CICSI delay block is 592ps. The ring oscillator using 101 stages of delay block is designed and it is shown that it operates at a frequency of 17MHz with a power consumption of 420?W.
{"title":"Design of efficient delay block for low frequency application","authors":"S. K. Dash, S. Mishra, N. Rout","doi":"10.2298/fuee2003489d","DOIUrl":"https://doi.org/10.2298/fuee2003489d","url":null,"abstract":"In recent years researchers have been focusing on the design of low power and\u0000 small size oscillator for emerging areas of interest such as the internet of\u0000 things (IoT) and biomedical applications. In this paper a new delay block\u0000 for ring oscillator is proposed using CMOS inverter cascaded with inverted\u0000 current starved inverter (CICSI). The designed delay block provides\u0000 approximately 50% more delay with a smaller number of transistors than the\u0000 conventionally designed circuits. Furthermore, a ring oscillator and a\u0000 non-overlapping clock (NOC) generator are designed using it. The designed\u0000 circuits can be used in switched capacitor (SC) circuits, analog mixed\u0000 signal circuits to meet the need for low frequency portable biomedical\u0000 applications. The designed circuits are simulated on Generic 90nm 1.2V\u0000 Process Design Kit (GPDK90) using Cadence Virtuoso Design Environment. The\u0000 simulation result shows the delay of the CICSI delay block is 592ps. The\u0000 ring oscillator using 101 stages of delay block is designed and it is shown\u0000 that it operates at a frequency of 17MHz with a power consumption of 420?W.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"128 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87639217","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}
In this work, a GaAs-based quantum well solar cell with a 25-layer InAs/GaAs intermediate layer is simulated in Silvaco Atlas TCAD software. In order to reduce the recombination caused by the presence of the quantum layers and increase the absorption of photons, electron blocking layers (EBLs) and hole blocking layers (HBLs) have been added to the solar cell in an In0.5(Al0.7Ga0.3)0.5P semiconductor. The results show that the efficiency of the proposed solar cell increases 17.38% by obtaining impurity the thickness and doping of the EBL and HBL layers. It can be concluded that the use of the In0.5(Al0.7Ga 0.3)0.5P semiconductor with EBL and HBL layers decreases the open circuit voltage (Voc) caused in the quantum wells. The efficiency of the proposed solar cell with EBL and HBL layers was found to be 44.65%.
{"title":"Study of hole-blocking and electron-blocking layers in a InaS/GaAs multiple quantum-well solar cell","authors":"Sobhan Abasian, R. Sabbaghi‐Nadooshan","doi":"10.2298/fuee2003477a","DOIUrl":"https://doi.org/10.2298/fuee2003477a","url":null,"abstract":"In this work, a GaAs-based quantum well solar cell with a 25-layer InAs/GaAs\u0000 intermediate layer is simulated in Silvaco Atlas TCAD software. In order to\u0000 reduce the recombination caused by the presence of the quantum layers and\u0000 increase the absorption of photons, electron blocking layers (EBLs) and hole\u0000 blocking layers (HBLs) have been added to the solar cell in an\u0000 In0.5(Al0.7Ga0.3)0.5P semiconductor. The results show that the efficiency of\u0000 the proposed solar cell increases 17.38% by obtaining impurity the thickness\u0000 and doping of the EBL and HBL layers. It can be concluded that the use of\u0000 the In0.5(Al0.7Ga 0.3)0.5P semiconductor with EBL and HBL layers decreases\u0000 the open circuit voltage (Voc) caused in the quantum wells. The efficiency\u0000 of the proposed solar cell with EBL and HBL layers was found to be 44.65%.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"29 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78212682","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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