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UV-Ozone Generation from Modified High Intensity Discharge Mercury Vapor Lamps for Treatment of Indium Tin Oxide Films

Santos, Emerson Roberto; Burini, Elvo Calixto; Hui, Wang Shu
Fonte: TAYLOR & FRANCIS INC; PHILADELPHIA Publicador: TAYLOR & FRANCIS INC; PHILADELPHIA
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
66.44%
In a homemade UV-Ozone generator, different ignition tubes extracted from HID mercury vapor lamps were investigated, namely: 80, 125, 250 and 400 watts. The performance of the generator in function of the type of the ignition lamp was monitored by the measurements of the ozone concentration and the temperature increment. The results have shown that the 400 W set up presented the highest ozone production, which was used in the treatment of indium tin oxide (ITO) films. Polymer light emitting diodes were assembled using ITO films, treated for 10, 20 and 30 min, as an anode. The overall results indicate improvement of the threshold voltage (reduction) and electroluminescence of these devices.; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES); Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq); Grupo de Eletronica Molecular; Instituto Astronomico e Geofisico of the University of Sao Paulo

Filmes de óxido de índio dopado com estanho depositados por magnetron sputtering.; Indium-tin oxide thin films deposited by magnetron sputtering.

Damiani, Larissa Rodrigues
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 16/12/2009 PT
Relevância na Pesquisa
66.62%
O óxido de índio dopado com estanho é um semicondutor degenerado de alta transparência no espectro visível e alta condutância elétrica. Por suas propriedades, ele é utilizado como eletrodo transparente em diversas aplicações. Algumas destas aplicações exigem que os filmes sejam depositados sobre substratos poliméricos, que degradam em temperaturas acima de 100 °C. Por este motivo, métodos de deposição que utilizam baixas temperaturas são necessários. O objetivo deste trabalho é o desenvolvimento de técnicas de deposição de filmes de óxido de índio dopado com estanho, em baixas temperaturas (< 100 °C), pelo método de magnetron sputtering de rádio fequência. Filmes foram obtidos sobre substratos de silício, vidro e policarbonato, e suas propriedades físicas, elétricas, ópticas, químicas e estruturais foram analisadas por perfilometria, elipsometria, curvas corrente-tensão, prova de quatro pontas, medidas de efeito Hall, difratometria de raios-X e espectrofotometria. Filmes depositados sobre silício e vidro tiveram resistividade elétrica mínima da ordem de 10^-4 Ohm.cm, enquanto a resistividade do filme obtido sobre policarbonato foi da ordem de 10^-3 Ohm.cm. A transmitância óptica média no espectro visível das amostras variou de 66 a 87 %. Do ponto de vista estrutural...

Influence of rare earth doping on the structural and catalytic properties of nanostructured tin oxide

Fajardo, Humberto V.; Longo, Elson; Probst, Luiz F. D.; Valentini, Antoninho; Carreno, Neftali L. V.; Nunes, Michael R.; Maciel, Adeilton P.; Leite, Edson R.
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica Formato: 194-199
ENG
Relevância na Pesquisa
66.55%
Nanoparticles of tin oxide, doped with Ce and Y, were prepared using the polymeric precursor method. The structural variations of the tin oxide nanoparticles were characterized by means of nitrogen physisorption, carbon dioxide chemisorption, X-ray diffraction, and X-ray photoelectron spectroscopy. The synthesized samples, undoped and doped with the rare earths, were used to promote the ethanol steam reforming reaction. The SnO2-based nanoparticles were shown to be active catalysts for the ethanol steam reforming. The surface properties, such as surface area, basicity/base strength distribution, and catalytic activity/selectivity, were influenced by the rare earth doping of SnO2 and also by the annealing temperatures. Doping led to chemical and micro-structural variations at the surface of the SnO2 particles. Changes in the catalytic properties of the samples, such as selectivity toward ethylene, may be ascribed to different dopings and annealing temperatures.

Sintering of tin oxide and its applications in electronics and processing of high purity optical glasses

Varela, José Arana; Perazolli, L. A.; Cerri, J. A.; Leite, E. R.; Longo, Elson
Fonte: Associação Brasileira de Cerâmica Publicador: Associação Brasileira de Cerâmica
Tipo: Artigo de Revista Científica Formato: 117-123
ENG
Relevância na Pesquisa
66.55%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Óxido de estanho é um material semicondutor do tipo n com comportamento altamente covalente. O transporte de massa neste óxido depende do estado da superfície promovido pela atmosfera ou pela solução sólida devida a dopagem de óxido aliovalente. A sinterização e o crescimento de grão deste tipo de óxido na forma de pó é então controlado pela atmosfera e pela formação de vacância de oxigênio extrínseca. Para o pó de SnO2 puro o estado da superfície depende somente da interação das moléculas da atmosfera com a superfície do SnO2. Atmosferas inertes como a de argônio promovem a formação de vacâncias de oxigênio na superfície devido a redução de SnO2 para SnO na superfície e liberação de moléculas de oxigênio formando vacâncias de oxigênio. Como conseqüência, a difusão via superfície é aumentada originando crescimento de grão mas não densificação. A atmosfera de oxigênio inibe a redução de SnO2 diminuindo a concentração de vacâncias de oxigênio na superfície. A adição de dopantes de menor valência na temperatura de sinterização cria vacâncias de oxigênio carregadas extrínsecas...

Growth kinetics of tin oxide nanocrystals in colloidal suspensions under hydrothermal conditions

Lee, Eduardo J. H.; Ribeiro, Caue; Longo, Elson; Leite, Edson R.
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 229-235
ENG
Relevância na Pesquisa
56.43%
Colloidal suspensions of tin oxide nanocrystals were synthesized at room temperature by the hydrolysis reaction of tin chloride (II), in an ethanolic solution. The coarsening kinetics of such nanocrystals was studied by submitting the as-prepared suspensions to hydrothermal treatments at temperatures of 100, 150 and 200 degrees C for periods between 60 and 12,000 min. Transmission electron microscopy (TEM) was used to characterize the samples (i.e. distribution of nanocrystal size, average particle radius and morphology). The results show that the usual Ostwald ripening coarsening mechanism does not fit well the experimental data, which is an indicative that this process is not significant for SnO2 nanocrystals, in the studied experimental conditions. The morphology evolution of the nanocrystals upon hydrothermal treatment indicates that growth by oriented attachment (OA) should be significant. A kinetic model that describes OA growth is successfully applied to fit the data. (c) 2006 Elsevier B.V. All rights reserved.

Transport and sensors properties of nanostructured antimony-doped tin oxide films

Giraldi, T. R.; Escote, M. T.; Maciel, A. P.; Longo, Elson; Leite, E. R.; Varela, José Arana
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 2678-2685
ENG
Relevância na Pesquisa
66.51%
Tin oxide thin films doped with 7 mol% antimony oxide multilayer were prepared by the polymeric precursor method. Morphological characterization revealed films with round-shaped grains, nanometric size (similar to 13 nm), and low roughness. These films display high transmittance (similar to 80%) in the visible range of transmittance spectra, which is desirable for transparent conductive oxide films. Analysis on electrical resistivity versus temperature data showed two different conduction mechanisms toward the temperature range. The gas sensor properties measurement of the thicker thin film revealed good sensibility for the NOx. (c) 2006 Elsevier B.V. All rights reserved.

XPS study on water corrosion of fluorzirconate glasses and their protection by a layer of surface modified tin dioxide nanoparticles

Hammer, P.; Rizzato, A. P.; Pulcinelli, S. H.; Santilli, C. V.
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 128-134
ENG
Relevância na Pesquisa
56.43%
The surface corrosion process associated with the hydrolysis of fluorozirconate glass, Z-BLAN (53ZrF(4), 20BaF(2), 20NaF, 4LaF(2), 3AlF(3)), and the corrosion protection efficiency of a nanocrystalline transparent SnO2 layer were investigated by X-ray photoelectron spectroscopy. The tin oxide film was deposited by the sol-gel dip-coating process in the presence of Tiron(R) as particle surface modifier agent. The chemical bonding structure and composition of the surface region of coated and non-coated ZBLAN were studied before water contact and after different immersion periods (5-30 min). In contrast to the effects occurring for non-coated glass, where the surface undergoes a rapid selective dissolution of the most soluble species inducing the formation of a new surface phase consisting of stable zirconium oxyfluoride, barium fluoride and lanthanum fluoride species, the results for the SnO2-coated glass showed that the hydrolytic attack induces a filling of the film nanopores by dissolved glass material and the formation of tin oxylluoride and zirconium oxyfluoride species. This process results in a modified film, which acts as a hermetic diffusion barrier protecting efficiently the glass surface. (C) 2006 Elsevier B.V. All rights reserved.

Polyol-mediated synthesis of ultrafine tin oxide nanoparticles for reversible Li-ion storage

Ng, S. H.; dos Santos, D. I.; Chew, S. Y.; Wexler, D.; Wang, J.; Dou, S. X.; Liu, H. K.
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 915-919
ENG
Relevância na Pesquisa
66.44%
A simple, cheap and versatile, polyol-mediated fabrication method has been extended to the synthesis of tin oxide nanoparticles on a large scale. Ultrafine SnO2 nanoparticles with crystallite sizes of less than 5 nm were realized by refluxing SnCl2 . 2H(2)O in ethylene glycol at 195 degrees C for 4 h under vigorous stirring in air. The as-prepared SnO2 nanoparticles exhibited enhanced Li-ion storage capability and cyclability, demonstrating a specific capacity of 400 mAh g(-1) beyond 100 cycles. (c) 2006 Elsevier B.V. All rights reserved.

Rheological properties of tin oxide suspensions

Santos, Iêda Maria Garcia dos; Souza, Antônio Gouveia de; Sensato, Fabrício Ronil; Leite, Edson Roberto; Longo, Elson; Varela, José Arana
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 1297-1306
ENG
Relevância na Pesquisa
66.5%
The rheological properties of tin oxide slurries were studied experimentally and theoretically. The deflocculants used were ammonium polyacrilate (PAA) and the copolymer poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate) (PVB-PVA-PVAc), in water and ethanol, respectively. The amount of deflocculant was optimized for different solid contents by means of viscosity measurements. In spite of the high stability of PVB-dispersed slurries, a high solid concentration was not obtained. On the other hand, a slurry with a 56.4 vol.% of solids was attained when PAA was used. A theoretical study of the adsorption of PAA in its dissociated (basic solution) and non-dissociated (acidic solution) forms on SnO 2 (110) is presented. This analysis was made by means of the PM3 method using a large cluster Sn 15O 28 for the surface model. The calculated adsorption energy is larger for the ionized PAA than for the non-ionized form, indicating that alkaline slurries favor PAA adsorption on the SnO 2 surface. © 2002 Elsevier Science Ltd. All rights reserved.

Ceramic Crucible Corrosion by Heavy Metal Oxide Glasses, Part I: Phenomenological Study

Garcia dos Santos, Iêda Maria; Moreira, R. C M; De Souza, A. G.; Paskocimas, C. A.; Leite, E. R.; Varela, José Arana; Longo, Elson
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 198-205
ENG
Relevância na Pesquisa
56.54%
Heavy metal oxide (HMO) glasses have received special attention due to their optical, electrical and magnetic properties. The problem with these glasses is their corrosive nature. In this work, three ceramic crucibles (Al 2O 3, SnO 2 and ZrO 2) were tested in the melting of the system 40 PbO-35 BiO 1.5-25 GaO 1.5 (cation-%). After glass melting, crucibles were transversally cut and analyzed by scanning electronic microscopy (SEM), coupled to microanalysis by energy dispersive spectroscopy (EDS). Results indicated that zirconia crucibles presented the highest corrosion, probably due to its smallest grain size. Tin oxide crucibles presented a low corrosion with small penetration of the glass into the crucible. This way, these crucibles are an interesting alternative to melt corrosive glasses in instead of gold or platinum crucibles. It is important to emphasize the lower cost of tin oxide crucibles, compared to gold or platinum ones.

Corrosion protection of fluorzirconate glasses coated by a layer of surface modified tin oxide nanoparticles

Hammer, P.; Rizzato, A. P.; Alvarez, F.; Landers, R.; Pulcinelli, S. H.; Santilli, C. V.
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Conferência ou Objeto de Conferência Formato: 94-98
ENG
Relevância na Pesquisa
66.5%
The protection efficiency against water corrosion of fluorozirconate glass, ZBLAN, dip-coated by nanocrystalline tin oxide film containing the organic molecule Tiron® was investigated by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The chemical bonding structure of the surface region and morphology were studied before and after two water exposure periods of 5 and 30 min. The results of the analysis for the as-grown sample revealed a SnO1.6 phase containing carbon and sulfur, related to Tiron®, and traces of elements related to ZBLAN (Zr, F, Ba). This fact and the clear evidence of the presence of tin oxifluoride specie (SnOxF y) indicates a diffusion of the glass components into the porous coating. After water exposure, the increase of the oxygen concentration accompanied by a strong increase of Zr, F, Ba and Na content is interpreted as filling of the nanopores of the film by glass compounds. The formation of a compact protective layer is supported by the morphological changes observed by AFM. © 2005 Elsevier B.V. All rights reserved.

Study of indium tin oxide thin films deposited on acrylics substrates by Ion beam assisted deposition technique

Meng Lijian; Liang Erjun; Gao Jinsong; Teixeira, Vasco M. P.; Santos, M. P. dos
Fonte: American Scientific Publishers Publicador: American Scientific Publishers
Tipo: Artigo de Revista Científica
Publicado em /07/2009 ENG
Relevância na Pesquisa
66.44%
Indium tin oxide (ITO) thin films have been deposited onto acrylics (PMMA) substrates by ion beam assisted deposition technique at different oxygen flows. The structural, optical and electrical properties of the deposited films have been characterized by X-ray diffraction, transmittance, FTIR, ellipometry and Hall effect measurements. The optical constants of the deposited films have been calculated by fitting the ellipsometric spectra. The effects of the oxygen flow on the properties of the deposited films have been studied. It has been found that 40 sccm oxygen flow is an optimum value for getting the films with good transmittance and low electrical resistivity.

An electrochemical study of tin oxide thin film in borate buffer solutions

Díaz,Raül; Díez-Pérez,Ismael; Gorostiza,Pau; Sanz,Fausto; Morante,Joan R.
Fonte: Sociedade Brasileira de Química Publicador: Sociedade Brasileira de Química
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2003 EN
Relevância na Pesquisa
56.47%
The electrochemical behavior of tin polycrystals in borate buffer solutions at pH 7.5 was systematically investigated using cyclic voltammetry, EC-STM and electrochemical impedance measurements. A systematic shift to more negative values of the potentials corresponding either to the major reduction peak either to the hydrogen evolution was measured when the anodization potential used for film growth was increased. A discussion about the different oxides there formed was included and a reassignation of tin oxidation and tin oxides reduction processes was given.

Sintering of tin oxide and its applications in electronics and processing of high purity optical glasses

Varela,J. A.; Perazolli,L. A.; Cerri,J. A.; Leite,E. R.; Longo,E.
Fonte: Associação Brasileira de Cerâmica Publicador: Associação Brasileira de Cerâmica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2001 EN
Relevância na Pesquisa
66.55%
Tin oxide is an n type semiconductor material with a high covalent behavior. Mass transport in this oxide depends on the surface state promoted by atmosphere or by the solid solution of aliovalent oxide doping. The sintering and grain grow of this type of oxide powder is then controlled by atmosphere and by extrinsic oxygen vacancy formation. For pure SnO2 powder the surface state depends only in the interaction of atmosphere molecules with the SnO2 surface. Inert atmosphere like argon promotes oxygen vacancy formation at the surface due to the reduction of SnO 2 to SnO at surface and liberation of oxygen molecules forming an oxygen vacancy. As a consequence, surface diffusion is enhanced leading to grain coarsening, but no densification. Oxygen atmosphere inhibits the SnO2 reduction decreasing the surface oxygen vacancy concentration. Additions of dopants with lower valence at sintering temperature create extrinsic charged oxygen vacancies that promote mass transport at grain boundary leading to densification and grain growth of this polycrystalline oxide. Cobalt and niobium doped SnO2 ceramics exhibit varistor behavior, which can be applied in electronics. Moreover, SnO2 ceramics are chemically inert and can be applied in form of crucibles to melt some optical glasses.

Thin copolymer-cased light-emitting display made with fluorine-foped tin oxide substrates

Lessmann,Rudolf; Hümmelgen,Ivo Alexandre
Fonte: ABM, ABC, ABPol Publicador: ABM, ABC, ABPol
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2004 EN
Relevância na Pesquisa
66.44%
Seven-segment displays are used to show numerical quantities in electronic equipment, being present in most of the low-end electronics. In this work we describe a novel organic light emitting display made with poly(1,10 decanedioxy 2 methoxy - 1,2 phenylene - 1,2 ethenylene - 3,6 dimethoxy - 1,4 phenylene - 1,2 ethenylene 3 methoxy - 1,4 - phenylene) (OPPVDBC), tris(8-hydroxyquinoline)aluminum salt (Alq3) and a hole injection layer (PEDOT:PSS: poly(3,4 - ethylenedioxythiophene) : poly(styrenesulfonate)). The general device structure is FTO/PEDOT:PSS/OPPVDBC/Ca/Al or FTO/PEDOT:PSS/OPPVDBC/Alq3/Ca/Al. The FTO (fluorine-doped tin oxide) thin films are transparent (transmittance > 80 % in the visible region of the spectrum), conductive (< 15 omega/º for 200 nm thick films), and present high chemical stability.

Tubular Organization of SnO₂ Nanocrystallites for Improved Lithium Ion Battery Anode Performance; Tubular Organization of SnO2 Nanocrystallites for Improved Lithium Ion Battery Anode Performace

Wang, Yong; Lee, Jim Yang; Zeng, Hua Chun
Fonte: MIT - Massachusetts Institute of Technology Publicador: MIT - Massachusetts Institute of Technology
Tipo: Artigo de Revista Científica Formato: 27561 bytes; application/pdf
EN
Relevância na Pesquisa
46.8%
Porous tin oxide nanotubes were obtained by vacuum infiltration of tin oxide nanoparticles into porous aluminum oxide membranes, followed by calcination. The porous tin oxide nanotube arrays so prepared were characterized by FE-SEM, TEM, HRTEM, and XRD. The nanotubes are open-ended, highly ordered with uniform cross-sections, diameters and wall thickness. The tin oxide nanotubes were evaluated as a substitute anode material for the lithium ion batteries. The tin oxide nanotube anode could be charged and discharged repeatedly, retaining a specific capacity of 525 mAh/g after 80 cycles. This capacity is significantly higher than the theoretical capacity of commercial graphite anode (372 mAh/g) and the cyclability is outstanding for a tin based electrode. The cyclability and capacities of the tin oxide nanotubes were also higher than their building blocks of solid tin oxide nanoparticles. A few factors accounting for the good cycling performance and high capacity of tin oxide nanotubes are suggested.; Singapore-MIT Alliance (SMA)

Desenvolvimento de catalisadores a base de estanho(IV), para produção de ésteres metílicos de ácidos graxos, via transesterificação e esterificação; Development of tin-based catalysts to produce methyl esters of fatty acid via transesterification and esterification.

Serra, Tatiana Maciel
Fonte: Universidade Federal de Alagoas; BR; Engenharia Química; Programa de Pós-Graduação em Engenharia Química; UFAL Publicador: Universidade Federal de Alagoas; BR; Engenharia Química; Programa de Pós-Graduação em Engenharia Química; UFAL
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
56.43%
The catalytic activity of metal complex exhibiting Lewis acid character (dibutyltin diacetate, dibutyltin dilaurate, butylstannoic acid and di-n-butyl-oxostannane) was investigated. These catalytic complexes have been tested in the alcoholysis of soybean and castor oils, aiming to obtain a mixture of fatty acid alkyl esters, called biodiesel. In the transesterification experiments of vegetable oils, the reactions were performed using three types of reactors. The first one consisted in a glass reactor connected to a reflux condenser (RVCR). The second device consisted of a stainless steel reactor (RP), hermetically sealed, fitted with a pressure gauge and a temperature controller. The third one was adapted to be used on a microwave system. On the last two reactor systems, the alcoholysis of triglycerides was also developed at vigorous conditions, at temperatures ranging from 80 °C and 150 °C. Comparing all reactions, the results show that the most reactive catalysts using the RVCR on the methanolysis of soybean oil are DBTDA and DBTDL with comparable performances. However, in the same reaction conditions, very low yields were observed using castor oil, and no generalizations could be pointed out. When RP were employed, better yields were obtained. When the temperature raise from 80 to 150 ºC...

Indium tin oxide (ITO) deposition, patterning and Schottky contact fabrication

Zhou, Jianming
Fonte: Rochester Instituto de Tecnologia Publicador: Rochester Instituto de Tecnologia
Tipo: Tese de Doutorado Formato: 2220815 bytes; application/pdf
EN_US
Relevância na Pesquisa
66.44%
As a transparent conductive material, indium tin oxide (ITO) has been utilized as electrodes in liquid crystal displays, solar cells, heat reflecting films and gas sensors. In general, the desired properties are high conductance and transmission. However, due to the complexity of ITO, the film properties strongly depend on the deposition processes. In this study, the deposition conditions for ITO film were optimized to get both high conductivity and transmission. The emphasis was on investigating the effects of various deposition parameters, such as oxygen partial pressure, total gas flow, annealing conditions and power. These are the most critical parameters for ITO deposition. A mathematical model to describe the material properties as functions of these parameters for a CVC model 601 Sputterer was developed utilizing JMP IN software. Films with resistivity 3x10-4Ω-cm and transmittance above 90% were achieved on glass and silicon substrates with 20 hours of annealing. The processing window (power: 120-150W, oxygen ratio: 6-10%) is, to the author’s knowledge, the largest reported by literature. However, the ITO film properties (electrical and optical) variation between runs needs to be further reduced. Patterning of ITO was also investigated. High but controllable etch rates are desired. Both wet and dry etch processes were developed. The etch rate of 48nm/min was achieved by using HCL aqueous solution (4:1 HCl to DI water volumetric ratio...

Depth-sensitive analysis of a degraded tin oxide electrode surface in a plasma device application

Lemoine, P.; Mariotti, Davide; Maguire, P.; McLaughlin, J.
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
56.33%
The transparent conductive thin films used as electrodes for plasma device applications can be damaged by the background plasma with a resulting spectral alteration of the optical emission of the device. In this work, we studied the surface damage experienced by a plasma-based artificial nose by a combination of surface sensitive techniques. Atomic force microscopy and glancing incidence low kV scanning electron microscopy show no change of microstructure. Energy dispersive X-ray analysis over a range of low electron energies reveals that the oxide has been reduced. This is confirmed by depth sensitive nanoindentation measurements, which indicate that the hardness and Young modulus are lower for the damaged surface.

Laser scribing of fluorine doped tin oxide for serial interconnection of CdS/CdTe solar cells

Jiménez-Olarte,D.; Vigil-Galán,O.; de la Rosa,J.; Seuret-Jiménez,D.; Contreras-Puente,G.
Fonte: Sociedad Mexicana de Física Publicador: Sociedad Mexicana de Física
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2015 EN
Relevância na Pesquisa
56.5%
In thin film PV-module production the scribing of transparent conducting oxides, like fluorine doped tin oxides thin films, is performed with serial interconnection of solar cells without the use of external wires. This scribing is usually carried out with infrared and ultraviolet lasers, while for the other films that complete the solar cell structure, the scribing is performed with visible laser light. Thus, the use of only one laser in all scribing steps in the monolithic interconnection process could reduce the manufacture cost of PV-CdTe modules. In this work the laser scribing process on fluorine doped tin oxides is investigated using a Nd:YAG pulsed laser of 532 nm of wavelength with pulse duration of 50 nanoseconds. The corresponding threshold fluence was measured and the mechanism of interaction of laser radiation with the semiconductor oxide was studied, as well as the temperature distribution along the film and the time when it reached its maximum value after applying the pulse of radiation on the SnO2 :F layer.