We have reviewed main peculiarities of amplitude and phase transmission/reflection spectra of different model semiconductor structures, including bare dielectric substrate, thin conductive layer placed between two dielectric media, thin conductive layer on dielectric substrate and hybrid plasmonic structures with thin conductive layer under metallic grating. The analysis has been performed using the analytical expressions obtained as a result of solving the Maxwell equations at normal incidence of plane electromagnetic waves. We have shown that specific behavior of the amplitude and phase spectra in THz frequency range can be used to determine basic electric parameters of electron gas, including electron concentration and electron mobility, in the framework of advanced THz time-domain measurements. Finally, we proposed efficient, electrically-controllable THz phase modulator based on effect of two-dimensional plasmon resonances in hybrid plasmonic structure with a spatially modulated electron concentration in a thin conductive layer.
{"title":"Peculiarities of amplitude and phase spectra of semiconductor structures in THz frequency range","authors":"Yu. M. Lyaschuk, V. Korotyeyev, V. Kochelap","doi":"10.15407/spqeo25.02.121","DOIUrl":"https://doi.org/10.15407/spqeo25.02.121","url":null,"abstract":"We have reviewed main peculiarities of amplitude and phase transmission/reflection spectra of different model semiconductor structures, including bare dielectric substrate, thin conductive layer placed between two dielectric media, thin conductive layer on dielectric substrate and hybrid plasmonic structures with thin conductive layer under metallic grating. The analysis has been performed using the analytical expressions obtained as a result of solving the Maxwell equations at normal incidence of plane electromagnetic waves. We have shown that specific behavior of the amplitude and phase spectra in THz frequency range can be used to determine basic electric parameters of electron gas, including electron concentration and electron mobility, in the framework of advanced THz time-domain measurements. Finally, we proposed efficient, electrically-controllable THz phase modulator based on effect of two-dimensional plasmon resonances in hybrid plasmonic structure with a spatially modulated electron concentration in a thin conductive layer.","PeriodicalId":21598,"journal":{"name":"Semiconductor physics, quantum electronics and optoelectronics","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84454179","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}
T. Kavetskyy, V. Soloviev, R. Khalilov, V. Serezhenkov, L. Pan’kiv, I. Pan’kiv, A. Nasibova, V.I. Stakhiv, A. Ivasivka, M. Starchevskyy, Y. Pavlovskyy, Y.V. Bondaruk, D.A. Dyachok, L. Bodnar, S. Voloshanska
An innovative approach based on the effect of bio-mineralization as a response reaction of cells to decrease their damage under stress was applied to Juniperus communis (JC) and JC-based biomaterials (Nefrovil and Immunostan drugs with properties increasing the antioxidant activity and improving the immune system of human organism, respectively). Electron paramagnetic resonance spectroscopy (EPR), also called electron spin resonance (ESR), was used as the main experimental tool for detecting paramagnetic species resulted from the existence of antioxidant activity system, represented by superoxide dismutase with manganese, catalase etc., as well as formation of superparamagnetic iron oxide nanoparticles (SPIONs). The influence of temperature and microwave power on the intensity of EPR signals detected in JC, Nefrovil and Immunostan was examined. Obtained g-factor values of EPR signals from JC shell and seeds as well as from Nefrovil and Immunostan were attributed to the paramagnetic species of Mn (g = 2.0), Fe3O4 SPIONs (g = 2.17…2.60), Fe aggregates (g = 3.22…3.94) and Fe3+ ions (g = 4.3). The EPR signals from SPIONs and Fe3+ ions in Immunostan were found to be fully correlated, showing an additional experimental evidence of the bio-mineralization effect (i.e., transformation of Fe3+ ions to Fe3O4 SPIONs). The results of the EPR study of Fe3O4 SPIONs incorporated into polymer matrix were taken into account in comparative analysis. The results reported in the present work support well self-organization of magnetic nanoparticles in the investigated biomaterials.
{"title":"EPR study of self-organized magnetic nanoparticles in biomaterials","authors":"T. Kavetskyy, V. Soloviev, R. Khalilov, V. Serezhenkov, L. Pan’kiv, I. Pan’kiv, A. Nasibova, V.I. Stakhiv, A. Ivasivka, M. Starchevskyy, Y. Pavlovskyy, Y.V. Bondaruk, D.A. Dyachok, L. Bodnar, S. Voloshanska","doi":"10.15407/spqeo25.02.146","DOIUrl":"https://doi.org/10.15407/spqeo25.02.146","url":null,"abstract":"An innovative approach based on the effect of bio-mineralization as a response reaction of cells to decrease their damage under stress was applied to Juniperus communis (JC) and JC-based biomaterials (Nefrovil and Immunostan drugs with properties increasing the antioxidant activity and improving the immune system of human organism, respectively). Electron paramagnetic resonance spectroscopy (EPR), also called electron spin resonance (ESR), was used as the main experimental tool for detecting paramagnetic species resulted from the existence of antioxidant activity system, represented by superoxide dismutase with manganese, catalase etc., as well as formation of superparamagnetic iron oxide nanoparticles (SPIONs). The influence of temperature and microwave power on the intensity of EPR signals detected in JC, Nefrovil and Immunostan was examined. Obtained g-factor values of EPR signals from JC shell and seeds as well as from Nefrovil and Immunostan were attributed to the paramagnetic species of Mn (g = 2.0), Fe3O4 SPIONs (g = 2.17…2.60), Fe aggregates (g = 3.22…3.94) and Fe3+ ions (g = 4.3). The EPR signals from SPIONs and Fe3+ ions in Immunostan were found to be fully correlated, showing an additional experimental evidence of the bio-mineralization effect (i.e., transformation of Fe3+ ions to Fe3O4 SPIONs). The results of the EPR study of Fe3O4 SPIONs incorporated into polymer matrix were taken into account in comparative analysis. The results reported in the present work support well self-organization of magnetic nanoparticles in the investigated biomaterials.","PeriodicalId":21598,"journal":{"name":"Semiconductor physics, quantum electronics and optoelectronics","volume":"22 4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85692694","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}
I. Nebola, A. Katanytsia, I. Shkyrta, Yurii O. Pal, I. Studenyak, M. Timko, P. Kopčanský
The paper is devoted to model phonon spectra calculations of argyrodite family crystals, namely: Ag7GeSe5I and Cu7GeSe5I (Ag7SiS5I and Cu7SiS5I). The specificity of the crystalline structure of these crystals is realization of variable partial populating different crystallographic orbits with Cu, I and Ag atoms (in 24 (g) and 48 (h) Positions Multiplicity, Wyckoff letter, Site symmetry of the space group ), which are associated with high superionic conductivity in crystals of this family. Compared in this paper are model phonon spectra calculated with account of three different configurations of orbital populations with Cu and Ag atoms (6 + 1, 5 + 2 and 4 + 3), by choosing the same lattice model for the unit cell and the set of force constants of each crystal. The calculations were performed by finding the eigenvalues of the generalized dynamic matrix perturbed by the modulation function of the mass defect obtained in the concept over spatial symmetry. It is shown that the phonon spectra do not undergo significant qualitative changes, which can serve as indirect evidence of the possibility to realize the jumping mechanism of super-ionic conductivity in these crystals in the high-temperature phase.
{"title":"Comparison of features arising in phonon spectra of crystals belonging to the argyrodite family for various combinations of orbits filled with Ag (Cu) atoms","authors":"I. Nebola, A. Katanytsia, I. Shkyrta, Yurii O. Pal, I. Studenyak, M. Timko, P. Kopčanský","doi":"10.15407/spqeo25.01.043","DOIUrl":"https://doi.org/10.15407/spqeo25.01.043","url":null,"abstract":"The paper is devoted to model phonon spectra calculations of argyrodite family crystals, namely: Ag7GeSe5I and Cu7GeSe5I (Ag7SiS5I and Cu7SiS5I). The specificity of the crystalline structure of these crystals is realization of variable partial populating different crystallographic orbits with Cu, I and Ag atoms (in 24 (g) and 48 (h) Positions Multiplicity, Wyckoff letter, Site symmetry of the space group ), which are associated with high superionic conductivity in crystals of this family. Compared in this paper are model phonon spectra calculated with account of three different configurations of orbital populations with Cu and Ag atoms (6 + 1, 5 + 2 and 4 + 3), by choosing the same lattice model for the unit cell and the set of force constants of each crystal. The calculations were performed by finding the eigenvalues of the generalized dynamic matrix perturbed by the modulation function of the mass defect obtained in the concept over spatial symmetry. It is shown that the phonon spectra do not undergo significant qualitative changes, which can serve as indirect evidence of the possibility to realize the jumping mechanism of super-ionic conductivity in these crystals in the high-temperature phase.","PeriodicalId":21598,"journal":{"name":"Semiconductor physics, quantum electronics and optoelectronics","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89913551","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, the influence of the technological process for metal-assisted chemical etching on surface morphology and electrophysical properties of obtained nanostructures has been investigated. It has been demonstrated that the obtained structures with a high aspect ratio could be used both in sensors and solar cells. It has been shown that application of the metal-assisted chemical etching (MACE) process enables to significantly improve the short-circuit current density in silicon solar cells (up to 29 mA/cm2). Also, the possibility of detection of hydrogen peroxide and glucose (via enzymatic reaction) by resistor-like sensors with nanostructured silicon as the sensitive area has been demonstrated with the sensitivity up to 2.5…2.75 mA/V•%.
{"title":"Silicon nanowire arrays synthesized using the modified MACE process: Integration into chemical sensors and solar cells","authors":"M. Dusheiko, V. Koval, T. Obukhova","doi":"10.15407/spqeo25.01.058","DOIUrl":"https://doi.org/10.15407/spqeo25.01.058","url":null,"abstract":"In this work, the influence of the technological process for metal-assisted chemical etching on surface morphology and electrophysical properties of obtained nanostructures has been investigated. It has been demonstrated that the obtained structures with a high aspect ratio could be used both in sensors and solar cells. It has been shown that application of the metal-assisted chemical etching (MACE) process enables to significantly improve the short-circuit current density in silicon solar cells (up to 29 mA/cm2). Also, the possibility of detection of hydrogen peroxide and glucose (via enzymatic reaction) by resistor-like sensors with nanostructured silicon as the sensitive area has been demonstrated with the sensitivity up to 2.5…2.75 mA/V•%.","PeriodicalId":21598,"journal":{"name":"Semiconductor physics, quantum electronics and optoelectronics","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87205122","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}
L. Kupchenko, A. S. Rybiak, О.А. Goorin, O. Biesova
The process of dynamic spectral processing of optical radiation in the active electro-optical system that provides enhancement of the contrast of the image target has been experimentally researched. A routine of experiment and a diagram of an experimental setup have been developed. The sources of optical radiation in the transmitting part of the active electro-optical system were three semiconductor lasers operating in the ranges of the red, green, and blue spectral regions. Absorption optical filters were used in the experiment as the elements simulating the spectral properties of the reflecting surfaces of the target and the background. To enhance the contrast of the target image, the spectral composition of the laser radiation is formed to provide maximum suppression of the background signal with minimum attenuation of the optical signal of the object. When forming the spectral density of the laser radiation intensity, a priori information about the spectral characteristics of the target and the background has been used. The results obtained in the course of the experiment confirm the possibility to separate the target signal from the background interferences due to using the dynamic spectral processing of optical radiation in the active electro-optical system.
{"title":"Experimental researches of dynamic spectral processing of optical radiation in the active electro-optical system","authors":"L. Kupchenko, A. S. Rybiak, О.А. Goorin, O. Biesova","doi":"10.15407/spqeo25.01.090","DOIUrl":"https://doi.org/10.15407/spqeo25.01.090","url":null,"abstract":"The process of dynamic spectral processing of optical radiation in the active electro-optical system that provides enhancement of the contrast of the image target has been experimentally researched. A routine of experiment and a diagram of an experimental setup have been developed. The sources of optical radiation in the transmitting part of the active electro-optical system were three semiconductor lasers operating in the ranges of the red, green, and blue spectral regions. Absorption optical filters were used in the experiment as the elements simulating the spectral properties of the reflecting surfaces of the target and the background. To enhance the contrast of the target image, the spectral composition of the laser radiation is formed to provide maximum suppression of the background signal with minimum attenuation of the optical signal of the object. When forming the spectral density of the laser radiation intensity, a priori information about the spectral characteristics of the target and the background has been used. The results obtained in the course of the experiment confirm the possibility to separate the target signal from the background interferences due to using the dynamic spectral processing of optical radiation in the active electro-optical system.","PeriodicalId":21598,"journal":{"name":"Semiconductor physics, quantum electronics and optoelectronics","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87545678","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}
A. Kostetskyi, Y. Piryatinski, A. Verbitsky, P. Lutsyk, A. Rozhin
This paper presents the study of the photoluminescent properties of molecular compositions consisting of melanin and an electron-acceptor material – fullerene derivative, [6,6]-phenyl C61 butyric acid methyl ester (PCBM). These molecular compositions have not been studied well and are promising for molecular electronics of natural materials, in particular, for organic solar cells. The novelty of this work relates to the study of photoluminescence spectra obtained for these molecular compositions and nanocomposites in various solvents (chloroform, acetonitrile, and toluene) as well as in a polystyrene matrix; these studies were carried out at various, in particular, liquid helium (4.2 K), temperatures. The obtained results allowed us to ascertain mechanisms of the state of aggregation and donor-acceptor interaction between melanin and PCBM.
{"title":"Photoluminescence of melanin-based nanocomposites with fullerene derivative","authors":"A. Kostetskyi, Y. Piryatinski, A. Verbitsky, P. Lutsyk, A. Rozhin","doi":"10.15407/spqeo25.01.049","DOIUrl":"https://doi.org/10.15407/spqeo25.01.049","url":null,"abstract":"This paper presents the study of the photoluminescent properties of molecular compositions consisting of melanin and an electron-acceptor material – fullerene derivative, [6,6]-phenyl C61 butyric acid methyl ester (PCBM). These molecular compositions have not been studied well and are promising for molecular electronics of natural materials, in particular, for organic solar cells. The novelty of this work relates to the study of photoluminescence spectra obtained for these molecular compositions and nanocomposites in various solvents (chloroform, acetonitrile, and toluene) as well as in a polystyrene matrix; these studies were carried out at various, in particular, liquid helium (4.2 K), temperatures. The obtained results allowed us to ascertain mechanisms of the state of aggregation and donor-acceptor interaction between melanin and PCBM.","PeriodicalId":21598,"journal":{"name":"Semiconductor physics, quantum electronics and optoelectronics","volume":"188 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76218243","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}
K. Andrieieva, L. Karachevtseva, K. P. Konin, A. Liptuga, O. Lytvynenko, D. V. Morozovska
The out-of-plane optical properties of a combined one-two-dimensional comb-type photonic structure based on macroporous silicon under illumination with polarized normally incident light have been experimentally investigated. Technologically simple quasi-periodic structure with parallel air grooves in the form of mutually overlapping macropores (i.e., one-dimensional air/Si type structure) together with macropores arbitrarily distributed over the crystal surface (two-dimensional air/Si structure) was studied in comparison with the calculated one-dimensional periodic metal lattice on silicon. It is shown that this combined air/Si photonic structure has significant polarization selectivity and can serve as a basis for developing the full-function out-of-plane thermal photodetector on macroporous silicon.
{"title":"The silicon model photonic structure for a full-function thermal photodetector","authors":"K. Andrieieva, L. Karachevtseva, K. P. Konin, A. Liptuga, O. Lytvynenko, D. V. Morozovska","doi":"10.15407/spqeo25.01.108","DOIUrl":"https://doi.org/10.15407/spqeo25.01.108","url":null,"abstract":"The out-of-plane optical properties of a combined one-two-dimensional comb-type photonic structure based on macroporous silicon under illumination with polarized normally incident light have been experimentally investigated. Technologically simple quasi-periodic structure with parallel air grooves in the form of mutually overlapping macropores (i.e., one-dimensional air/Si type structure) together with macropores arbitrarily distributed over the crystal surface (two-dimensional air/Si structure) was studied in comparison with the calculated one-dimensional periodic metal lattice on silicon. It is shown that this combined air/Si photonic structure has significant polarization selectivity and can serve as a basis for developing the full-function out-of-plane thermal photodetector on macroporous silicon.","PeriodicalId":21598,"journal":{"name":"Semiconductor physics, quantum electronics and optoelectronics","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90954357","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 an analytical model of an infrared thermal imaging device. This device is composed of a Quantum Well Infrared Photodetector (QWIP), a Heterojunction Bipolar transistor (HBT) and a Light Emitting Diode (LED). It is called as QWIP-HBT-LED Optoelectronic Integrated Device. The device is modeled based on its equivalent circuit by considering a nonlinear gain HBT, early effect. Analytical expressions describing the current time response, rise time, and output derivative as a measure of device speed have been derived. The numerical results show that the transient performance of this device version is enhanced by the injected current from QWIP to the base of HBT, also the output current is increased with the increase of the gain and early coefficient of HBT, on the other hand, it degrades when the base recombination factor of HBT or the load resistance is increased. Also, the rise time increases when the current gain or the early coefficient is increased. This type of models can be exploited as a pixel in thermal image processing applications.
{"title":"Small signal analysis of an infrared imaging device based on equivalent circuit model","authors":"S. Eladl, M. H. Saad","doi":"10.15407/spqeo25.01.083","DOIUrl":"https://doi.org/10.15407/spqeo25.01.083","url":null,"abstract":"This paper presents an analytical model of an infrared thermal imaging device. This device is composed of a Quantum Well Infrared Photodetector (QWIP), a Heterojunction Bipolar transistor (HBT) and a Light Emitting Diode (LED). It is called as QWIP-HBT-LED Optoelectronic Integrated Device. The device is modeled based on its equivalent circuit by considering a nonlinear gain HBT, early effect. Analytical expressions describing the current time response, rise time, and output derivative as a measure of device speed have been derived. The numerical results show that the transient performance of this device version is enhanced by the injected current from QWIP to the base of HBT, also the output current is increased with the increase of the gain and early coefficient of HBT, on the other hand, it degrades when the base recombination factor of HBT or the load resistance is increased. Also, the rise time increases when the current gain or the early coefficient is increased. This type of models can be exploited as a pixel in thermal image processing applications.","PeriodicalId":21598,"journal":{"name":"Semiconductor physics, quantum electronics and optoelectronics","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82743819","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}
Features of information exchange between satellites and satellites with ground stations and in the opposite direction are considered. The influence of such atmospheric factors as fog, rain, snow, atmospheric turbulence, background noise, and sky glow on the quality of information signals is analyzed. The expediency of using transmitter frequencies, which lie in the area of windows of the Earth transparency and are in the infrared region of the spectrum, has been established. In particular, generators of such frequencies in the near-infrared region can be InGaAs laser diodes, which are light in the region of about 1550 nm, and in the far-infrared region – cascade lasers, which are able to generate radiation in the range of 3.5 to 24 μm. InGaAs photodiodes and HgCdTe detectors should be used as receivers of the mentioned frequencies.
{"title":"Optical space communication. Review","authors":"M. Kulish, М. Malysh","doi":"10.15407/spqeo25.01.068","DOIUrl":"https://doi.org/10.15407/spqeo25.01.068","url":null,"abstract":"Features of information exchange between satellites and satellites with ground stations and in the opposite direction are considered. The influence of such atmospheric factors as fog, rain, snow, atmospheric turbulence, background noise, and sky glow on the quality of information signals is analyzed. The expediency of using transmitter frequencies, which lie in the area of windows of the Earth transparency and are in the infrared region of the spectrum, has been established. In particular, generators of such frequencies in the near-infrared region can be InGaAs laser diodes, which are light in the region of about 1550 nm, and in the far-infrared region – cascade lasers, which are able to generate radiation in the range of 3.5 to 24 μm. InGaAs photodiodes and HgCdTe detectors should be used as receivers of the mentioned frequencies.","PeriodicalId":21598,"journal":{"name":"Semiconductor physics, quantum electronics and optoelectronics","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75268345","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}
D. Pekur, Y. Kolomzarov, V. Sorokin, Yu. E. Nikolaenko
Considered in this paper are development and creation of high-power LED luminaires with high light efficiency and color rendering index (CRI). As light sources, there used are 6 powerful LED СОВ (Chip-on-Board) modules CreeCXA 2550, the radiation of which contains quasi-chromatic peaks in the spectral range 600…650 nm. It allows to provide CRI values higher than 92. Features of the improved compact construction of the luminaire with indicated COB modules have been presented. To ensure normal thermal regimes of LED COB modules, a small cooling system based on heat pipes has been created, the optimal dimensions of the structural elements of which have been determined by computer simulation. The results of modeling and experimental studies have shown that the developed and manufactured passive cooling system of LED COB modules provides operation temperature modes (up to 85 °C) of light-emitting crystals at the total electric power of COB modules up to 290 W and allows using the luminaires of this type in the systems of continuous artificial illumination with combined power supply. The efficiency of the developed cooling system at some angles to the horizon expands the scope of applying the illumination device.
{"title":"Super powerful LED luminaires with a high color rendering index for lighting systems with combined electric power supply","authors":"D. Pekur, Y. Kolomzarov, V. Sorokin, Yu. E. Nikolaenko","doi":"10.15407/spqeo25.01.097","DOIUrl":"https://doi.org/10.15407/spqeo25.01.097","url":null,"abstract":"Considered in this paper are development and creation of high-power LED luminaires with high light efficiency and color rendering index (CRI). As light sources, there used are 6 powerful LED СОВ (Chip-on-Board) modules CreeCXA 2550, the radiation of which contains quasi-chromatic peaks in the spectral range 600…650 nm. It allows to provide CRI values higher than 92. Features of the improved compact construction of the luminaire with indicated COB modules have been presented. To ensure normal thermal regimes of LED COB modules, a small cooling system based on heat pipes has been created, the optimal dimensions of the structural elements of which have been determined by computer simulation. The results of modeling and experimental studies have shown that the developed and manufactured passive cooling system of LED COB modules provides operation temperature modes (up to 85 °C) of light-emitting crystals at the total electric power of COB modules up to 290 W and allows using the luminaires of this type in the systems of continuous artificial illumination with combined power supply. The efficiency of the developed cooling system at some angles to the horizon expands the scope of applying the illumination device.","PeriodicalId":21598,"journal":{"name":"Semiconductor physics, quantum electronics and optoelectronics","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85142346","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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