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Ac Impedance Spectroscopy Of Al/A-Sic/C–Si(P)/Al Heterostructure under Illumination

References [1] KANNO, H.-IDE, D.-TSUNOMURA, Y.-TAIRA, S.-BABA, T.-YOSHIMINE, Y.-TAGUCHI, M.-KINOSHITA, T.-SAKATA, H.-MARUYAMA, E. : Over 22% Efficient HIT Solar Cell, In: Proceedings of the 23rd European photovoltaic solar energy conference and exhibition, Valencia, Spain, 2008, pp. 1136-1139. [2] STREET, R. A. : Technology and Applications of Amorphous Silicon, Springer, New York, 2000. [3] CHANG, Y. L.-CHEN, M. Y.-LIU, J. S. Q.-CHIEN, Y. J.-YANG, P. C.-HUANG, M. Y. : Silicon Carbide Emitter for Heterojunction

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Electric measurements of PV heterojunction structures a-SiC/c-Si

R eferences [1] D. A. Anderson and W. E. Kspear, “Electrical and Optical Properties of Amorphous Silicon Carbide, Silicon Nitride and Germanium Carbide Prepared by Glow Discharge Technique”, Philos. Mag. B vol. 35, 1977, pp. 113–131. [2] P. P. Dey and A. Khare, “Effect of Substrate Temperature on Structural and Linear and Nonlinear Optical Properties of Nanostructured PLD a-SiC thin films”, Materials Research Bulletin vol. 84, 2016, pp. 105–117. [3] I. Kleps and A. Angelescu, “LPCVD Amorphous Silicon Carbide Films, Properties and

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Influence of load and reinforcement content on selected tribological properties of Al/SiC/Gr hybrid composites

. Study Of Mechanical And Tribological Properties Ofal-6061 Reinforced With Silicon Carbide And Graphite Particles , International Journal of Technology Enhancements and Emerging Engineering Research, 3(4). R avindran , P., M anisekar , K., R athika , P., N arayanasamy , P. 2013. Tribological properties of powder metallurgy – Processed aluminium self-lubricating hybrid composites with SiC additions , Materials and Design, 45, 561–570. R adhika , N., S ubramanian , R., V enkat P rasat , S., A nandavel , B. 2012. Dry sliding wear behaviour of aluminium

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Design of AC-DC Grid Connected Converter using Multi-Objective Optimization

Abstract

Power electronic circuits, in particular AC-DC converters are complex systems, many different parameters and objectives have to be taken into account during the design process. Implementation of Multi-Objective Optimization (MOO) seems to be attractive idea, which used as designer supporting tool gives possibility for better analysis of the designed system. This paper presents a short introduction to the MOO applied in the field of power electronics. Short introduction to the subject is given in section I. Then, optimization process and its elements are briefly described in section II. Design procedure with proposed optimization parameters and performance indices for AC-DC Grid Connected Converter (GCC) interfacing distributed systems is introduced in section III. Some preliminary optimization results, achieved on the basis of analytical and simulation study, are shown at each stage of designing process. Described optimization parameters and performance indices are part of developed global optimization method dedicated for ACDC GCC introduced in section IV. Described optimization method is under development and only short introduction and basic assumptions are presented. In section V laboratory prototype of high efficient and compact 14 kVA AC-DC converter is introduced. The converter is elaborated based on performed designing and optimization procedure with the use of silicon carbide (SiC) power semiconductors. Finally, the paper is summarized and concluded in section VI. In presented work theoretical research are conducted in parallel with laboratory prototyping e.g. all theoretical ideas are verified in laboratory using modern DSP microcontrollers and prototypes of the ACDC GCC.

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Extended T-type Inverter

Abstract

This paper presents a new concept for a power electronic converter - the extended T-type (eT) inverter, which is a combination of a three-phase inverter and a three-level direct current (dc)/dc converter. The novel converter shows better performance than a comparable system composed of two converters: a T-type inverter and a boost converter. At first, the three-level dc/dc converter is able to boost the input voltage but also affects the neutral point potential. The operation principles of the eT inverter are explained and a simulation study of the SiC-based 6 kVA system is presented in this paper. Presented results show a serious reduction of the DC-link capacitors and the input inductor. Furthermore, suitable SiC power semiconductor devices are selected and power losses are estimated using Saber software in reference to a comparative T-type inverter. According to the simulations, the 50 kHz/6 kVA inverter feed from the low voltage (250 V) shows <2.5% of power losses in the suggested SiC metal oxide-semiconductor field-effect transistors (MOSFETs) and Schottky diodes. Finally, a 6 kVA laboratory model was designed, built and tested. Conducted measurements show that despite low capacitance (2 × 30 μF/450 V), the neutral point potential is balanced, and the observed efficiency of the inverter is around 96%.

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Amorphous silicon PEC-PV hybrid structure for photo-electrochemical water splitting

R eferences [1] M. Zeman and Z. Dong, “Heterojunction silicon based solar cells, Physics and technology of amorphous-crystalline heterostructure silicon solar cells”, Springer Berlin Heidelberg , pp. 13–43, 2012. [2] S. De Wolf, A. Descoeudres, ZC. Holman and C. Ballif, “High-efficiency silicon heterojunction solar cells: A review”, Green , vol. 2, no. 1, pp. 7–24, 2012. [3] K. Masuko, M. Shigematsu, T. Hashiguchi, D. Fujishima, M. Kai, N. Yoshimura, T. Yamaguchi, Y. Ichihashi, T. Mishima, N. Matsubara, T. Yamanishi, T. Takahama, M. Taguchi, E

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Characterization of nanoblisters on HOPG surface

patterns on HOPG”, Surf. Sci. , 2019. [10] M. Kettner, C. Stumm, M. Schwarz, C. Schuschke, and J. Libuda, “Pd model catalysts on clean and modified HOPG: Growth, adsorption properties, and stability”, Surf. Sci. , 2019. [11] R. Shikhgasan, T. Stefan, S. Dinara, S. Sebastian, and R. Guseyn, “Epitaxy of silicon carbide on silicon: Micromorphological analysis of growth surface evolution”, Superlattices Microstruct. , vol. 86, pp. 395–402, 2015. [12] D. Sobola, S. Talu, S. Solaymani, and L. Grmela, “Influence of scanning rate on quality of AFM image

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Cutting Environment Impact on the Aluminium Alloy Machining

Proc. Int. DAAAM Symp. , Vol. 2015–Janua, No. 2016, pp. 709–714, 2015. [4] BHOWMICK, S., ALPAS, A. T. 2008. Minimum quantity lubrication drilling of aluminium–silicon alloys in water using diamond-like carbon coated drills. Int. J. Mach. Tools Manuf. , Vol. 48 (12–13), pp. 1429–1443. [5] YU, D. G. 2017. Deep hole drill with positive taper and principle for elimination of drill deviation using cutting fluid. Int. J. Adv. Manuf. Technol. , 89 (9–12), pp. 3195–3206. [6] KONG,L., LI, Y., LV, Y., WANG, Q. 2013. Numerical investigation on dynamic

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The influence of substrate bias voltage on the electrochemical properties of ZrN thin films deposited by radio-frequency magnetron sputtering: Biomedical application

–454, 2002. [7] L. K. Elbaum, M. Wittmer, C. Y. Ting, J. Cumo, “ZrN diffusion barrier in aluminum metallization schemes”, J. Thin Solid Films , vol. 104, pp. 81, 1983. [8] M. Ostling, S. Nygren, C. S. Petersson, H. Norstrom, P. Wiklund, R. Buchta, H. O Blom, S. Berg, “Reactively sputtered ZrN used as an Al/Si diffusion barrier in a Zr contact to silicon”, J. Vac. Sci. Technol. A , vol. 2, pp. 281, 1984. [9] W. Ensinger, U. K. Volza, M. Kiuchi, “Ion beam-assisted deposition of nitrides of the 4th group of transition metals”, Surface & Coating Technology

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The Hardening in Alloys and Composites and Its Examination with a Diffraction and Self-Consistent Model

, “Influence of stirring speed and stirring time on distribution of particles in cast metal matrix composite,” Journal of Materials Processing Technology , vol. 171, no. 2, pp. 268–273, Jan. 2006. [11] K. Suryanarayanan, R. Praveen, and S. Raghuraman, “Silicon carbide reinforced aluminium metal matrix composites for aerospace applications: a literature review,” International Journal of Innovative Research in Science, Engineering and Technology , vol. 2, no. 11, pp. 6336–6344, 2013. [12] S. H. Avner, Introduction to physical metallurgy . New York: McGraw

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