Células solares orgânicas baseadas em MEH-PPV
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(2) Universidade de Aveiro Departamento de Física 2009. Ricardo Manuel Pinho Células Solares Orgânicas baseadas em MEH-PPV Silva. dissertação apresentada à Universidade de Aveiro para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Engenharia Física, realizada sob a orientação científica do Prof. Dr. Luiz Fernando Ribeiro Pereira, Professor Auxiliar do Departamento de Física da Universidade de Aveiro. . .
(3) . . o júri presidente. Prof. Dr. Manuel Almeida Valente. Professor Associado do Departamento de Física da Universidade de Aveiro. Profª. Drª. Ana Maria Heleno Branquinho do Amaral. Professora Auxiliar do Instituto Superior Técnico da Universidade Técnica de Lisboa. Prof. Dr. Luiz Fernando Ribeiro Pereira. Professor Auxiliar do Departamento de Física da Universidade de Aveiro. . . .
(4) . . Ao Professor Doutor Luiz Pereira, orientador desta dissertação, pelo conhecimento, perspicácia e rigor cientifico partilhados, pelos desafios propostos e pela constante abertura para a discussão de ideias.. agradecimentos. À minha mulher, Helena, pela paciência e apoio, pela força e coragem transmitidas, e pelo tempo dedicado a ler e reler o presente trabalho. Agradeço ao CeNTI, pela sua colaboração na disponibilidade para o uso do Microscópio de Força Atómica que muito ajudou na compreensão dos resultados obtidos. À minha família e amigos um muito obrigado por tudo.. . .
(5) . palavras-chave. células solares orgânicas, MEH-PPV, heterojunção, filmes finos. resumo. No presente trabalho procedeu-se ao estudo e fabrico de células solares orgânicas do tipo bulk heterojunction, baseadas no polímero poly(2-methoxy-5dopada com a (2-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV) nanoestrutura [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) em filmes finos . A caracterização opto-electrónica revelou uma forte absorção na zona espectral azul-verde, confirmando a aplicabilidade destes materiais para este tipo de dispositivos. Foram obtidos valores relevantes em parâmetros como factor de forma e eficiência. É apresentada uma tentativa de explicação dos resultados com base nas propriedades micro-eléctricas e morfológicas. Produziram-se, de igual forma, células flexíveis baseadas na mesma estrutura, tendo em vista a sua aplicabilidade em larga escala.. . .
(6) . keywords. organic solar cell, MEH-PPV, heterojunction, thin film . abstract. In this work some thin film bulk-heterojunction organic solar cells based on polymer poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene) (MEHPPV) doped with nanostructures [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) was made and studied. The opto-electrical characterization showed a strong absorption in the blue-green spectrum region, confirming the applicability of these materials for this kind of devices. Relevant data was obtained for fill-factors and efficiency. An attempt to explain the macroscopic behavior based on micro-electrical and morphological properties was done. Flexible devices based on same structure were also made in order to test the possible application in large scale.. .
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