Photoconductivity In Langmuir-Schaefer And Drop Casting Films Of Fullerene Derivatives

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Trabalho

Título do Trabalho

PHOTOCONDUCTIVITY IN LANGMUIR-SCHAEFER AND DROP CASTING FILMS OF FULLERENE DERIVATIVES

Autores

André Vítor Santos Simõis (ME); FCT-Unesp
Lucas Kaique Martins Roncaselli
Deuber Lincon da Silva Agostini
Roger C. Hiorns
Clarissa de Almeida Olivati

Modalidade

Apresentação - pôster (Clique aqui para saber os detalhes para submissão)

Área temática

Síntese e caracterização de materiais

Data de Publicação

20/05/2022

País da Publicação

Brasil

Idioma da Publicação

Inglês

Página do Trabalho

https://www.even3.com.br/anais/workshopineo2022/473319-photoconductivity-in-langmuir-schaefer-and-drop-casting-films-of-fullerene-derivatives

ISBN

Palavras-Chave

fullerenes, thin films, photoconductivity

Resumo

Fullerene is a material that has gained prominence in the area of organic electronics due to its affinity for collecting electrons, a property that gives fullerene great interest in optoelectronics. Due to its great chemical and structural stability, C60 fullerene is considered to be the third carbon allotrope, after diamond and graphite [1]. A negative characteristic associated with fullerene is its tendency to form aggregates in an uncontrolled way, which makes the controlled study of its properties difficult [2]. One way to overcome these difficulties is to incorporate the fullerene into a polymeric structure, in order to obtain greater control over its aggregation, improve its solubility and increase its malleability, making it easy to handle. These procedures result in oligo(fullerenes) and poly(fullerenes) [3,4,5]. In this work, three derivatives were studied, namely: PCBM, OPCBMMB and PPCBMB. The aim of this work is to analyze the effect of photoconductivity in these materials, observing the variation of the electric current where there is incidence of light, under the effect of a constant voltage. To achieve this goal, the samples were submitted to the constant voltage of 5 V, and the current variation over time (i vs t) was recorded, alternating in light and dark cycles, using a solar simulator to focus light on the films. As a result, it was possible to observe the increase in current when there is incidence of light, where its incidence creates electron-hole pairs, dissociated by the action of the external voltage source, which is also responsible for transporting them through the volume of the films. It is also observed that in the PPCBMB the electric currents do not present any change related to the incidence of light, which can be compared with its UV-vis absorption spectrum, where it is possible to observe that its absorption region is concentrated in the ultraviolet, outside the visible spectrum, showing a blue-shift offset compared to the other materials, caused by its synthesis process References [1] J. G. V. Romero, “Síntese de Fulerenos (C60 e C70) e nanotubos de carbono de parede simples em plasma de hélio, e sua caracterização por IV, UV, DRX, Adsorção de Gases, Espectrsocopia Raman, MEV e MET.,” pp. 1–15, 2002. [2] H. C. Wong et al., “Morphological stability and performance of polymer-fullerene solar cells under thermal stress: The impact of photoinduced PC60BM oligomerization,” ACS Nano, vol. 8, no. 2, pp. 44 1297–1308, 2014, doi: 10.1021/nn404687s. [3] H. H. Ramanitra et al., “Increased thermal stabilization of polymer photovoltaic cells with oligomeric PCBM,” J. Mater. Chem. C, vol. 4, no. 34, pp. 8121–8129, 2016, doi: 10.1039/c6tc03290g. [4] M. Stephen et al., “Sterically Controlled Azomethine Ylide Cycloaddition Polymerization of Phenyl-C61-Butyric Acid Methyl Ester,” Chem. Commun., vol. 2016, 2016 [5] R. C. Hiorns et al., “Main-chain fullerene polymers for photovoltaic devices,” Macromolecules, vol. 42, no. 10, pp. 3549–3558, 2009, doi: 10.1021/ma900279a.

Título do Evento: Workshop INEO 2022
Título dos Anais do Evento: Anais do Workshop INEO 2022
Nome da Editora: Even3
Meio de Divulgação: Meio Digital

Como citar

FCT-UNESP, André Vítor Santos Simõis (ME); et al.. PHOTOCONDUCTIVITY IN LANGMUIR-SCHAEFER AND DROP CASTING FILMS OF FULLERENE DERIVATIVES.. In: Anais do 16° Workshop do Instituto Nacional de Eletrônica Orgânica. Anais...São Carlos(SP) IFSC, 2022. Disponível em: https//www.even3.com.br/anais/workshopINEO2022/473319-PHOTOCONDUCTIVITY-IN-LANGMUIR-SCHAEFER-AND-DROP-CASTING-FILMS-OF-FULLERENE-DERIVATIVES. Acesso em: 09/12/2024