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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo da influência de parâmetros de manufatura e de caracterização nas propriedades fotocondutivas de filmes de óxidos metálicos processados por solução / Study of the influence of manufacturing and characterization parameters on the photoconductive properties of metal oxides films processed by solution

Moisés, Lucas Augusto [UNESP] 11 September 2018 (has links)
Submitted by Lucas Augusto Moisés (lucasaugustomoises@hotmail.com) on 2018-11-12T14:28:19Z No. of bitstreams: 1 Dissertação Lucas Augusto Moisés_2.pdf: 2728995 bytes, checksum: 4372fefa9820f84b2816df79babc8610 (MD5) / Approved for entry into archive by Adriana Aparecida Puerta null (dripuerta@rc.unesp.br) on 2018-11-13T18:12:17Z (GMT) No. of bitstreams: 1 moises_la_me_rcla.pdf: 2728995 bytes, checksum: 4372fefa9820f84b2816df79babc8610 (MD5) / Made available in DSpace on 2018-11-13T18:12:18Z (GMT). No. of bitstreams: 1 moises_la_me_rcla.pdf: 2728995 bytes, checksum: 4372fefa9820f84b2816df79babc8610 (MD5) Previous issue date: 2018-09-11 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / No presente trabalho produziram-se filmes finos transparentes de ZnO depositados pela técnica de spray-pirólise com objetivo de estudar o comportamento de suas propriedades elétricas durante a incidência de luz UV e após a incidência de luz (no escuro). Para tal, foram propostos três designs experimentais do tipo fatorial de dois níveis, um do tipo fatorial fracionário com base no modelo de Plackett-Burman e dois fatoriais completos. Na realização desses experimentos, variou-se parâmetros de produção do filme e também parâmetros experimentais no momento da realização da medida, sendo nove parâmetros no total. Através dos dados obtidos nesses experimentos, obteve-se respostas experimentais. Em cima disso foram realizadas analises estatísticas. Assim, através dessas análises se conheceu quais os fatores experimentais tiveram maior influência em cada uma dessas respostas e os resultados obtidos tiveram um bom acordo com a teoria, indicando a eficácia dos experimentos fatoriais de dois níveis realizados. Por fim, foi realizado medidas de predição e comparado as respostas obtidas nessas medidas com os dados estatísticos obtidos. Através dessa comparação, foi encontrado uma resposta reprodutível, indicando assim a possibilidade aplicação de filmes de ZnO na área de sensores / In the present work, transparent thin films of ZnO deposited by the spray - pyrolysis technique were used to study the behavior of their electrical properties during the incidence of UV light and after the incidence of light (in the dark). For that, three experimental designs of the two - level factorial type were proposed, one of the fractional factorial type based on the Plackett - Burman model and two complete factorials. In the performance of these experiments, parameters of production of the film were varied as well as experimental parameters at the moment of the measurement, being nine parameters in total. Through the data obtained in these experiments, experimental responses were obtained. Statistical analyzes were performed on top of this. Thus, through these analyzes it was known which experimental facto rs had the greatest influence on each one of these responses and the results obtained had a good agreement with the theory, indicating the effectiveness of the two - level factorial experiments performed. Finally, prediction measures were performed and the r esponses obtained in these measurements were compared with the statistical data obtained. Through this comparison, a reproducible response was found, thus indicating the possibility of applying ZnO films in the area of sensors

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