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Choi, Hyun Ho,Najafov, Hikmet,Kharlamov, Nikolai,Kuznetsov, Denis V.,Didenko, Sergei I.,Cho, Kilwon,Briseno, Alejandro L.,Podzorov, Vitaly American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.39
<P>Photoinduced charge transfer between semiconductors and gate dielectrics can occur in organic field-effect transistors (OFETs) operating under illumination, leading to a pronounced bias-stress effect in devices that are normally stable while operating in the dark. Here, we report an observation of a'polarization-dependent photoinduced bias-stress effect in two' prototypical single-crystal OFETs, based on rubrene and tetraphenylbis(indolo{l,2-alpha})quinolin. We find that the decay rate of the source-drain current in these OFETs under, illumination is a periodic function of the polarization angle of incident photoexcitation with respect to the crystal axes, with a periodicity of n. The angular positions of maxima and minima of the bias-stress rate match those of the optical absorption coefficient of the corresponding crystals. The analysis of the effect shows that it stems from a charge transfer of 'hot' holes, photogenerated in the crystal within a very short thermafization length (MLT mu m) from the semiconductor-dielectric interface. The observed phenomenon is a type of intrinsic structure-property relationship, revealing how molecular packing affects parameter drift in organic transistors under illumination. We also demonstrate that a photoinduced charge transfer in OFETs can be used for recording rewritable accumulation channels with an optically defined geometry and resolution, which can be used in a number of potential applications.</P>
Use Of Interactive Internet Services In Education
Moskalenko-Vysotska, Olena,Melnyk, Emiliia,Tovstenko-Zabelin, Serhii,Lehka, Svitlana,Didenko, Maryna,Hrubych, Kostiantyn International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.1
The article describes the concept of a Web-portal of an educational institution; the technical conditions for the creation of the Web-portal of the educational institution were determined; the features of the use of the Web-portal in the educational process and its organization are revealed. The scientific and practical value of the article lies in the fact that the use of portals in education will improve the management of an educational institution, activate and bring the educational process to the level of modern technologies at all its stages, as well as enhance the interaction of parents and students with employees of the educational institution.
Evolutionary Theory Of Management In Education
Moskalenko-Vysotska, Olena,Melnyk, Emiliia,Tovstenko-Zabelin, Serhii,Lehka, Svitlana,Didenko, Maryna,Hrubych, Kostiantyn International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.1
The article notes that one of the reasons for the crisis in education was the sharp discrepancy between the emerging new forms and content and the model of macro-management that has developed over the decades. The level of management of the educational system did not emerge as a specific activity characterized by its own mechanisms and processes, just as qualified carriers of this activity - professionals - managers - did not appear. At the same time, there is practically no theoretical and methodological model of the macrolevel of education management, that is, management of the educational system as an integral structure.
Olha Karaman,Olha Duke,Volodymyr Shkavro,Olena Polinok,Nataliia Didenko International Journal of Computer ScienceNetwork S 2024 International journal of computer science and netw Vol.24 No.4
The main purpose of the study is to determine the key aspects of the use of electronic educational resources in the training of future specialists in higher education institutions. The importance of using electronic educational resources in the preparation of university students is proven. The relevance of the chosen topic is due to the high rise of globalization in the process of training future specialists in higher education institutions. The theoretical and methodological basis of the article is the fundamental and modern provisions of the theory, the work of scientists and specialists in the management of electronic educational resources in the field of education. Based on the results of the analysis, the main characterizing aspects of the use of electronic educational resources in the training of future specialists in higher education institutions were identified. Further research needs to analyze new, experimental electronic means in the system of student training.