Pub Date : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019415
Kirichenko Mykhailo, Z. Roman, Khrypunov Gennadiy, Minakova Kseniia, T. Roman, Prokopenko Dmytro
In order to develop a constructive solution of flexible high efficiency thin-film solar cells based on the CdS/CdTe system adapted for the installation of a solar battery from such solar cells directly onto the standard solar thermal collector plate the serie of flexible solar cel cells samples with various thickness of functional layers it has been manufactured. The research of solar cells test samples carried out by optical methods and by measurement and subsequent analytical processing of illuminated current-voltage characteristics. It has been established that the absorption coefficient of flexible CdS/CdTe based solar cells in the visible range is 105 cm-1, and the reflection coefficient in the infrared spectrum region does not exceed 7-8 % which allows excluding absorber with a selective coating from collector because its function will perform directly by such solar cell. It has been shown that, due to a significant reduction of substrate weight for flexible solar cells, it was possible to achieve specific power values up to 2.0 kW/kg.
{"title":"Influence of Functional Layers Thickness on CdTe Based Flexible Solar Cells Efficiency","authors":"Kirichenko Mykhailo, Z. Roman, Khrypunov Gennadiy, Minakova Kseniia, T. Roman, Prokopenko Dmytro","doi":"10.1109/CAOL46282.2019.9019415","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019415","url":null,"abstract":"In order to develop a constructive solution of flexible high efficiency thin-film solar cells based on the CdS/CdTe system adapted for the installation of a solar battery from such solar cells directly onto the standard solar thermal collector plate the serie of flexible solar cel cells samples with various thickness of functional layers it has been manufactured. The research of solar cells test samples carried out by optical methods and by measurement and subsequent analytical processing of illuminated current-voltage characteristics. It has been established that the absorption coefficient of flexible CdS/CdTe based solar cells in the visible range is 105 cm-1, and the reflection coefficient in the infrared spectrum region does not exceed 7-8 % which allows excluding absorber with a selective coating from collector because its function will perform directly by such solar cell. It has been shown that, due to a significant reduction of substrate weight for flexible solar cells, it was possible to achieve specific power values up to 2.0 kW/kg.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132184903","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 : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019495
P. Roy, R. Jamier, M. Malleville, B. Leconte, R. Dauliat, A. Schwuchow, K. Wondraczek, J. Didierjean
In this invited communication, we perform a review on Fully-Aperiodic Large Pitch Fibers. Major advantages and drawbacks of this design are presented first as well as the synthesis method, which enables the success of their fabrication. Some laser experiments are then detailed in order to prove the relevance of the aperiodic fiber concept. Very last experimental results and some prospects will be finally shown during the conference.
{"title":"High peak and average power delivery from Fully-Aperiodic Large-Pitch-Fiber lasers (Invited)","authors":"P. Roy, R. Jamier, M. Malleville, B. Leconte, R. Dauliat, A. Schwuchow, K. Wondraczek, J. Didierjean","doi":"10.1109/CAOL46282.2019.9019495","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019495","url":null,"abstract":"In this invited communication, we perform a review on Fully-Aperiodic Large Pitch Fibers. Major advantages and drawbacks of this design are presented first as well as the synthesis method, which enables the success of their fabrication. Some laser experiments are then detailed in order to prove the relevance of the aperiodic fiber concept. Very last experimental results and some prospects will be finally shown during the conference.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133361917","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 : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019425
A. Tyurin, S. Zhukov, A. Akhmerov, V. P. Churashov
The spectral sensitization technology of heterophase "nonsilver core-silver haloid shell" microsystems that allows fixing a dye at both molecular and/or J-aggregated stages on the internal as well as external surfaces of a light sensitive shell has been proposed. The creation of heterophase "nonsilver core-dye-silver haloid shell-dye" microsystems is proved by the results of the spectrosensitometric and luminescence characteristics including the depth and surface development of the exposed layers.
{"title":"Spectral Sensitization With Dyes Of Heterophase Microsystems \"Nucleus – Silver Halide Shell\"","authors":"A. Tyurin, S. Zhukov, A. Akhmerov, V. P. Churashov","doi":"10.1109/CAOL46282.2019.9019425","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019425","url":null,"abstract":"The spectral sensitization technology of heterophase \"nonsilver core-silver haloid shell\" microsystems that allows fixing a dye at both molecular and/or J-aggregated stages on the internal as well as external surfaces of a light sensitive shell has been proposed. The creation of heterophase \"nonsilver core-dye-silver haloid shell-dye\" microsystems is proved by the results of the spectrosensitometric and luminescence characteristics including the depth and surface development of the exposed layers.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133783926","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 : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019514
T. Ovsyannikova, A. Kovalenko, I. Zabelina, Natalya Hmil, T. Mishchenko, A. Gladkih, A. Levchenko
The paper considers the effects of low intensity laser irradiation (LILI; 633 nm, 20–40 mW/cm2) as well as visible and infra-red polarized electromagnetic irradiation (VIRPEI; 480-3400 nm, 20–40 mW/cm2) on the liver mitochondria isolated from both the normal and type 2 diabetic rats. It was revealed that on the one hand the rate of oxygen absorption by mitochondria in rats with diabetes was decreased versus the quantity in rats of control group, but on the other hand the value was increased due to the LILI action. The respiratory data of control rats did not change after the of laser irradiation effect. The mitochondrial functions were decreased as the result of the VIRPEI influence. The respiratory processes are the basic ones for receiving the energy by various biological objects, both multicellular organisms and unicell ones, for example bacteria. Since the biological respiration is based on the electron transport chains functioning, isolated mitochondria is a model system for studying the respiratory processes. The application field of these effects is first of all biotechnology, particularly, cultivation of cells and tissues.
{"title":"Effect of Low Intensity Laser Irradiation as well as Visible and Infra-Red Polarized Irradiation on Rat Liver Mitochondria","authors":"T. Ovsyannikova, A. Kovalenko, I. Zabelina, Natalya Hmil, T. Mishchenko, A. Gladkih, A. Levchenko","doi":"10.1109/CAOL46282.2019.9019514","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019514","url":null,"abstract":"The paper considers the effects of low intensity laser irradiation (LILI; 633 nm, 20–40 mW/cm2) as well as visible and infra-red polarized electromagnetic irradiation (VIRPEI; 480-3400 nm, 20–40 mW/cm2) on the liver mitochondria isolated from both the normal and type 2 diabetic rats. It was revealed that on the one hand the rate of oxygen absorption by mitochondria in rats with diabetes was decreased versus the quantity in rats of control group, but on the other hand the value was increased due to the LILI action. The respiratory data of control rats did not change after the of laser irradiation effect. The mitochondrial functions were decreased as the result of the VIRPEI influence. The respiratory processes are the basic ones for receiving the energy by various biological objects, both multicellular organisms and unicell ones, for example bacteria. Since the biological respiration is based on the electron transport chains functioning, isolated mitochondria is a model system for studying the respiratory processes. The application field of these effects is first of all biotechnology, particularly, cultivation of cells and tissues.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133788931","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 : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019422
S. Gulak, A. Cherkashin, I. Balashov, V. I. Zarytskyi, Yu. S. Kurskoy, Yu. V. Zhdanova
This research paper solves the challenge of plastic product marking. In particular, plastic cap marking. Nowadays, IR lasers (fiber, solid-state, gas lasers) are used for plastic marking, in most cases these are 1.06 µm fiber lasers, but plastics must contain metal additives for obtaining a high-quality marking with such a laser. And those additives are not safe for plastic products in the food industry. This problem is solved by using high-energy UV lasers. Therefore, the NII Laser Technology PJSC team has developed and produced a comprehensive system for high-resolution marking of both plastic products and other materials (metal, glass, ceramics) based on an ultraviolet laser. A combination of 2D-scanning technology, adaptive focusing, marking of objects in motion (on-the-fly), as well as a number of other technological and design solutions in this system made it possible to start production of conveyor lines for dynamic marking of beverage closures, crown caps, elongated plastic and metal caps amongst others that are used in the food industry. In comparison to the existing marking technologies, the developed laser marking comprehensive system provides high-speed (up to 100 thousand caps per hour) marking with text, digital and graphic data on the outer surfaces of the plastic produced without any special coloring agents, and allows getting a contrast image by using gray shading regardless of the surface color. At the present day, NII Laser Technology PJSC has carried out work to expand the capabilities of the laser marking comprehensive systems through the introduction of 3D scanning technology and the use of two band laser systems, that increase the product protection. The safety of using ultraviolet radiation for marking the internal surfaces of food packaging plastic elements is confirmed by the certificate on laboratory testing by INSTITUT NEHRING GmbH - Heesfeld 17-38,112 Braunschweig
{"title":"Laser marking system for plastic products","authors":"S. Gulak, A. Cherkashin, I. Balashov, V. I. Zarytskyi, Yu. S. Kurskoy, Yu. V. Zhdanova","doi":"10.1109/CAOL46282.2019.9019422","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019422","url":null,"abstract":"This research paper solves the challenge of plastic product marking. In particular, plastic cap marking. Nowadays, IR lasers (fiber, solid-state, gas lasers) are used for plastic marking, in most cases these are 1.06 µm fiber lasers, but plastics must contain metal additives for obtaining a high-quality marking with such a laser. And those additives are not safe for plastic products in the food industry. This problem is solved by using high-energy UV lasers. Therefore, the NII Laser Technology PJSC team has developed and produced a comprehensive system for high-resolution marking of both plastic products and other materials (metal, glass, ceramics) based on an ultraviolet laser. A combination of 2D-scanning technology, adaptive focusing, marking of objects in motion (on-the-fly), as well as a number of other technological and design solutions in this system made it possible to start production of conveyor lines for dynamic marking of beverage closures, crown caps, elongated plastic and metal caps amongst others that are used in the food industry. In comparison to the existing marking technologies, the developed laser marking comprehensive system provides high-speed (up to 100 thousand caps per hour) marking with text, digital and graphic data on the outer surfaces of the plastic produced without any special coloring agents, and allows getting a contrast image by using gray shading regardless of the surface color. At the present day, NII Laser Technology PJSC has carried out work to expand the capabilities of the laser marking comprehensive systems through the introduction of 3D scanning technology and the use of two band laser systems, that increase the product protection. The safety of using ultraviolet radiation for marking the internal surfaces of food packaging plastic elements is confirmed by the certificate on laboratory testing by INSTITUT NEHRING GmbH - Heesfeld 17-38,112 Braunschweig","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133867465","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 : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019528
M. Iasechko, O. Daki, Yurii Samsonov, I. Atamanenko, I. Martynov, V. Mudryk
The results of the development of a formalized mathematical model for describing the interaction of laser radiation with the plasma material intended to protect REM by reflecting this radiation are presented in this research. The basic structure of the physical model of solid-state plasma material is presented. It has been found out that the generation of the Langmuir noise in the protective layer of solid-state plasma of the screen of radio-electronic means provides shielding from laser radiation at a sufficiently small value of the field strength of the Langmuir wave. In this case, there is a reemission of laser energy in the opposite direction.
{"title":"The Use of the Solid-State Plasma-based Material for the Protection of Radio-electronic Means of Laser Emission","authors":"M. Iasechko, O. Daki, Yurii Samsonov, I. Atamanenko, I. Martynov, V. Mudryk","doi":"10.1109/CAOL46282.2019.9019528","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019528","url":null,"abstract":"The results of the development of a formalized mathematical model for describing the interaction of laser radiation with the plasma material intended to protect REM by reflecting this radiation are presented in this research. The basic structure of the physical model of solid-state plasma material is presented. It has been found out that the generation of the Langmuir noise in the protective layer of solid-state plasma of the screen of radio-electronic means provides shielding from laser radiation at a sufficiently small value of the field strength of the Langmuir wave. In this case, there is a reemission of laser energy in the opposite direction.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130348978","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 : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019521
V. Akmen, S. Sorokina, M. Serhiienko
Since the technology for producing a significant part of dairy products is based on the coagulation processes of milk proteins, the experimental study of the dependence of the coagulation process on temperature and acidity was conducted. It is proved that the best approximation is quadratic with use of the least-squares method. The standard uncertainties of the approximating dependencies coefficients were assessed; it allowed determining the optimal temperature of milk proteins coagulation by known values of its acidity. It is found that incorrect choice of the approximating dependence changes the selected temperature parameters of milk coagulation and increases standard uncertainty of the optimum temperature.
{"title":"Assessment of the Uncertainty of Measurements under Determining the Temperature Parameters of Milk Proteins Coagulation","authors":"V. Akmen, S. Sorokina, M. Serhiienko","doi":"10.1109/CAOL46282.2019.9019521","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019521","url":null,"abstract":"Since the technology for producing a significant part of dairy products is based on the coagulation processes of milk proteins, the experimental study of the dependence of the coagulation process on temperature and acidity was conducted. It is proved that the best approximation is quadratic with use of the least-squares method. The standard uncertainties of the approximating dependencies coefficients were assessed; it allowed determining the optimal temperature of milk proteins coagulation by known values of its acidity. It is found that incorrect choice of the approximating dependence changes the selected temperature parameters of milk coagulation and increases standard uncertainty of the optimum temperature.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124392201","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 : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019416
T. Radivilova, Lyudmyla Kirichenko, Bulakh Vitalii
The article analyses the classification of time series according to their fractal properties by machine learning. The classification was carried out using neural networks and the random forest method. Objects were the model fractal time series with given the Hurst exponent. Each class was a set of time series with the Hurst exponent values in a predetermined range. Input features were the values of time series. It was demonstrated that in this case the classification accuracy is high enough. The most accurate classification results were obtained using recurrent neural network. The proposed method can be readily used in practice for recognition, classification and clustering of time series with fractal properties.
{"title":"Comparative analysis of machine learning classification of time series with fractal properties","authors":"T. Radivilova, Lyudmyla Kirichenko, Bulakh Vitalii","doi":"10.1109/CAOL46282.2019.9019416","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019416","url":null,"abstract":"The article analyses the classification of time series according to their fractal properties by machine learning. The classification was carried out using neural networks and the random forest method. Objects were the model fractal time series with given the Hurst exponent. Each class was a set of time series with the Hurst exponent values in a predetermined range. Input features were the values of time series. It was demonstrated that in this case the classification accuracy is high enough. The most accurate classification results were obtained using recurrent neural network. The proposed method can be readily used in practice for recognition, classification and clustering of time series with fractal properties.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125689787","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 : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019531
Valerii V. Semenets, M. Neofitnyy, Y. Machekhin, O. Hnatenko, V. I. Zarytskyi, S. Gulak
The development of a modern laser system for recording optics is presented in this research paper. Studying optical components for designing this system by various methods, by calculated methods and by a method of using modern modeling package Zemax, was conducted. The results of the calculations and simulation, which led to the preliminary design of the laser system of optics registration, coincide.
{"title":"Laser system for recording optics","authors":"Valerii V. Semenets, M. Neofitnyy, Y. Machekhin, O. Hnatenko, V. I. Zarytskyi, S. Gulak","doi":"10.1109/CAOL46282.2019.9019531","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019531","url":null,"abstract":"The development of a modern laser system for recording optics is presented in this research paper. Studying optical components for designing this system by various methods, by calculated methods and by a method of using modern modeling package Zemax, was conducted. The results of the calculations and simulation, which led to the preliminary design of the laser system of optics registration, coincide.","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130119999","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 : 2019-09-01DOI: 10.1109/CAOL46282.2019.9019432
M. Vasnetsov, V. Ponevchinsky, D. Plutenko, A. A. Mitryaev, O. Gudymenko, V. Kladko
We report the results of an experimental study of polymer bulk material Polyamide-6 luminescence properties. A new effect of persistent time-delayed luminescence was revealed at room temperature. Detailed inspection of the effect has shown strong dependence on the microscopic crystalline structure of the polymer. Two morphological forms were recognized with the aid of X-ray Bragg reflection treating. The afterglow with the decay time exceeding 10 seconds was found to appear at about 150 K for the γ-form and is observed at room temperature for the α- form. The temporal dependence of time-delayed luminescence was found to satisfy hyperbolic Becquerel law, thus indicating the recombination origin of the effect. Also, emission realized with the excitation by third optical harmonics of a femtosecond Ti:Sapphire laser (267 nm) at room temperature was examined. The registered luminescence spectra were found quite different for these forms. While γ-form samples exhibit spectrum at the visible region, the α-form emits a pronounced luminescence output in the near UV (340 nm).
{"title":"Luminescence of Polyamide-6 α and γ forms (Invited)","authors":"M. Vasnetsov, V. Ponevchinsky, D. Plutenko, A. A. Mitryaev, O. Gudymenko, V. Kladko","doi":"10.1109/CAOL46282.2019.9019432","DOIUrl":"https://doi.org/10.1109/CAOL46282.2019.9019432","url":null,"abstract":"We report the results of an experimental study of polymer bulk material Polyamide-6 luminescence properties. A new effect of persistent time-delayed luminescence was revealed at room temperature. Detailed inspection of the effect has shown strong dependence on the microscopic crystalline structure of the polymer. Two morphological forms were recognized with the aid of X-ray Bragg reflection treating. The afterglow with the decay time exceeding 10 seconds was found to appear at about 150 K for the γ-form and is observed at room temperature for the α- form. The temporal dependence of time-delayed luminescence was found to satisfy hyperbolic Becquerel law, thus indicating the recombination origin of the effect. Also, emission realized with the excitation by third optical harmonics of a femtosecond Ti:Sapphire laser (267 nm) at room temperature was examined. The registered luminescence spectra were found quite different for these forms. While γ-form samples exhibit spectrum at the visible region, the α-form emits a pronounced luminescence output in the near UV (340 nm).","PeriodicalId":308704,"journal":{"name":"2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132857002","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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