Abstract

CUADRO BAUTISTA, Walter; ENSUNCHO MUNOZ, Adolfo  and  ROBLES, Juana R.. Theoretical characterization and design of efficient photoactive materials based on Anthra[2,3-c]Pyrrole and Anthra[2,3-c]Thiophene derivatives aimed towards organic solar cells. Rev. Soc. Quím. Perú [online]. 2017, vol.83, n.2, pp.221-233. ISSN 1810-634X.

In this research we have designed electron donors D-π-A type containing two different π fragments to obtain anthrapyrrole (D-APR-A) and anthratiophene (D-ATF-A) derivatives, proposed for the use in organic bulk hetero-junction (BHJ) solar cells (OSCs). These derivatives were characterized by DFT and TD-DFT calculations. For all the electron donors the anchorage fragment was 2-methylenemalononitrile, while the chromophore fragment was spanned between diphenylamine, triphenylamine, thiophene. Estimation of the energy from HOMO and LUMO orbitals was discussed. Properties affecting open-circuit photovoltage (VOC) and short-circuit photocurrent (JSC) from D-π-A type derivatives were investigated, such as geometric structure, exciton driving force energy, energy gap and absorption spectra. Theoretical calculations from TD-DFT within Coulumb Attenuation Method CAM-B3LYP were able to predict excited state properties. The electron donors D-π-A type exhibit an estimated photoelectric conversion efficiency (PCE) above 10%. The anthrapyrrole derivatives along with the [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) are the complexes with higher photoelectric properties, being the Da-APR-A derivative the best projection with a PCE of 13,39%, therefore, these complexes are proposed as photoactive materials in the construction of organic bulk hetero-junction solar cells

Keywords : organic solar cell; D-APR-A derivatives; D-ATF-A derivatives; DFT methods; photoelectric conversion efficiency.

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