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Screen Printing of SU-8 Layers for Microstructure Fabrication / Ar Sietspiedi Uzklātu SU-8 Pārklājumi Mikro-Struktūru Izgatavošanai

. 5. Garcano, G., Ceriani M., and Soglio, F. Spin coating with high viscosity photo-resist on square substrates - Applications in the thin film hybrid microwave integrated circuit field. Microelectronics International, 10(3), 12-20. 6. Gale, B.K, Eddings, M.A., Sundberg, S.O., Hatch, A., Kim, J., and Ho, T. (2007). Low- Cost MEMS Technologies. Elsevier. 7. Yue, W., Li, C.W., Xu, T., and Yang, M. (2013). Screen printing of solder resist as master substrates for fabrication of multi-level microfluidic channels and flask

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Photoelectric Properties of Screen-Printed Al-Doped ZnO Films

Photoelectric Properties of Screen-Printed Al-Doped ZnO Films

The potential of cheap semiconductor materials in the area of solar energy use is illustrated by the example of zinc oxide (pure and Al-doped in various concentrations). Under investigation was the electric conductivity and photoelectric properties of ZnO thin films. The samples were prepared using screen-printing technique. The results of measurements point to non-linear relationships between Al concentration, photosensitivity and electrical conductivity of thin ZnO films. Optimal Al concentration for practical use of ZnO in photovoltaic devices is found to be ~ 1%. The experimental methods, technologies and results described in the paper could be used for further investigations in this area.

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Effi ciency of dye sensitized solar cells with various compositions of TiO2 based screen printed photoactive electrodes

Abstract

The TiO2 electrode has a key role in dye sensitized solar cell (DSSC) technology in the charge generation and charge transportation. The properties of TiO2 layer affect resulting efficiency of DSSC and can be controlled by printing process and chemical composition of printing paste. TiO2 pastes with different compositions of TiO2 nanoparticles, ethanol, ethyl cellulose, water, acetic acid, α-terpineol were prepared and screen printed onto the glass substrate with fluorine doped tin oxide (FTO). The TiO2 pastes for screen printing were characterized by rheological measurements and screen printed TiO2 electrodes by atomic force microscopy and UV-Vis spectroscopy. The photocurrent - voltage characteristics and efficiencies of DSSC were evaluated and compared. All prepared TiO2 pastes were suitable for screen printing with ideal rheological characteristics. The highest efficiency 0.68 % and current density ISC = 1.21 mA/cm2 reached by the DSSC based on TiO2 electrode with thickness 1.5 μm, with amount of absorbed dye 1.1 × 10-8 mol/cm2 and without visible cracks and particles aggregation. This TiO2 electrode was prepared from the paste containing 5.4 wt. % of TiO2, 65.3 wt. % of ethanol, 1.8 wt. % of ethyl cellulose, 23 wt. % of H2O and 4.5 wt. % of CH3COOH.

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2-Methyl-2,4-pentanediol gas sensor properties of nano-SnO2 flat-type coplanar gas sensing arrays at low detection limit

Abstract

Nano-SnO2 flat-type coplanar 2-Methyl-2,4-pentanediol (MPD) gas sensor arrays were fabricated by a screen-printing technique based on nano-SnO2 powders prepared by a hydrothermal method. The results show that the fabricated gas sensor arrays have good MPD gas sensing characteristics, such as good selectivity and response-recovery characteristics. Especially, they can be used for detecting the concentration of MPD gas as low as 1 ppm which is much lower than the legal concentration of 20 ppm or 25 ppm. The good sensing properties indicate that the SnO2 gas sensor arrays have great potential for on-line or portable monitoring of MPD gas in practical environments.

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Improved efficiency of p-type quasi-mono silicon blanket emitter solar cell by ion implantation and backside rounding

Abstract

A novel type of silicon material, p-type quasi-mono wafer, has been produced using a seed directional solidification technique. This material is a promising alternative to traditional high-cost Czochralski (CZ) and float-zone (FZ) materials. This study evaluates the application of an advanced solar cell process that features a novel method of ion-implantation and backside rounding process on p-type quasi-mono silicon wafer. The ion implantation process substituted for thermal POCl3 diffusion leads to better Rsheet uniformity (<3 %). After screen-printing, the interface of Al and back surface field (BSF) layers was analyzed for the as prepared samples and the samples etched to three different depth. SEM showed that increased etch depth improved both BSF layer and Al-Si layer. The IQE result also showed that the samples with higher etching depth had better performance at long wavelength. The I–V cell tester showed that the sample with the etching depth of 6 μm ± 0.1 μm had the greatest efficiency, due to the highest Voc and Isc. The solar cell fabricated in this innovative process on 156 × 156mm p-type quasi-mono silicon wafer achieved 18.82 % efficiency.

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Design and Characterization of Periodically Conductive Woven Fabric

Textiles, 46(1), 143-59. [13] Guan, F. W., Xiao, H., Shi, M. W., Yu, W. D., Wang, F. M. (2017). Realization of planar frequency selective fabrics and analysis of transmission characteristics. Textile Research Journal, 87(11), 1360-1366. [14] Seager, R. D., Chauraya, A., Bowman, J., Broughton, M., Philpott, R., et al. (2013). Fabric based frequency selective surfaces using weaving and screen printing. Electronics Letters, 49(24), 1507-1509. [15] Chin, K. S., Wu, C. S., Shen, C. L., Tsai, K. C. (2018). Designs of textile antenna arrays for smart clothing

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Determination of Fabric Surface Resistance by Van Der Pauw Method in Case of Contacts Distant from the Sample Edge

., Hertleer, C., De Mey, G., Schwarz, A., Guxho, G., Van Langenhove, L.: Electrical conductive textiles obtained by screen printing. Fibres and Textiles in Eastern Europe 20 (2012), p.57-63 [5] Náhlík, J., Kašpárková, I., Fitl, P.: Influence of non-ideal circumferential contacts on errors in the measurements of the resistivity of layers using the van der Pauw method.Measurement 46 (2013), p.887-892 [6] Kazani, I., De Mey, G., Hertleer, C., Banaszczyk, J., Schwarz, A., Guxho, G., Van Langenhove, L.: Van der Pauw method for measuring

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Performance Study of Screen-Printed Textile Antennas after Repeated Washing

through screen printing. (2012) Fibres & Textiles in Eastern Europe; 1 (90): 57-63. [18] Kim Y, Kim H, Yoo H.J. Electrical Characterization of Screen-Printed Circuits on the Fabric. (2010). IEEE Transactions on Advanced Packaging, 33: 196-205. [19] Kellomäki T, Virkki J, Merilampi S, Ukkonen L. Towards Washable Wearable Antennas: A comparison of Coating materials for screen-printed textile-based UHF RFID tags. (2012). International Journal of Antennas and Propagation [20] Declercq F, Rogier H. Active Integrated Wearable

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Review of Printed Fabric Pattern Segmentation Analysis and Application

. In XVIII IMEKO World Congress Metrology for a Sustainable Development. [59] Hewage, R., Sonnadara, D. (2011). Colour image segmentation technique for screen printing. Proceedings of the Technical Sessions, 27, 60-67. [60] Rajarajan, J., Kalivarathan, D. G. (2012). Influence of local segmentation in the context of digital image processing–a feasibility study. International Journal of Computer Engineering & Technology (IJCET), 3(3), 340-347. [61] Zhang, Y., Lu, Z., Li, J. (2010). Fabric defect classification using radial basis function network

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Composite Oxide Electrolytes for Electrochemical Devices

American Ceramic Society 89 (2006) pp.2304-2307. Gaudon M, Djurado E, Menzler N, Morphology and sintering behaviour of yttria stabilised zirconia (8-YSZ) powders synthesised by spray pyrolysis, Ceramic International 30 (2004) pp. 2295-2303. Peng R, Xia Ch, Peng D, Meng G, Effect of powder preparation on (CeO 2 ) 0.8 (Sm 2 O 3 ) 0.1 thin film properties by screen-printing, Materials Letters 58 (2004) pp.604-608. Cheng J, Zha S, Huang J, Liu X, Meng G, Sintering behaviour and electrical

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