Efeito da fotocondução em diodos com camada ativa de derivados de poli(p-fenileno vinileno) (PPV) / Photoconduction effect in single layer diodes based on PPV derivatives.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

This thesis is a study about photoconductivity in polymeric materials, in particular diodes with single-layer sandwich structure derivates of poly(para-phenylene vinylene) (PPV): OC10-PPV, SY and MEH-PPV. Different metallic electrodes were deposited on the same polymeric layer. Therefore, it was necessary to realize the devices fabrication process step by step as well to dominate the characterization techniques. The optical properties of polymeric film were analyzed through the absorption and emission spectrum in the visible region. The photoconductivity behavior was studied by dc current-voltage (I-V) and photocurrent action spectra through the absorption and emission spectrum in the visible region. The photoconductivity behavior was studied by dc current-voltage (I-V) and photocurrent action spectra through the both side of device under applied voltages. The variation of these parameters allowed verifying how are influencing in the charge carrier photo-generation and the charge transport and then to adapt and apply a theoretical model wich considers the electric field applied to fit the photocurrent action spectra of devices. The values of the parameters allow to survey important about photoconductivity properties of the materials

ASSUNTO(S)

polímeros conjugados diodos orgânicos fotocondutividade conjugated polymers espectro de fotocorrente organic diodes photocurrent action spectra. photoconductivity

ACESSO AO ARTIGO

Documentos Relacionados