X-ray microscopic investigation of molecular orientation in a hole carrier thin film for organic solar cells - Archive ouverte HAL Access content directly
Journal Articles Nano Research Year : 2017

X-ray microscopic investigation of molecular orientation in a hole carrier thin film for organic solar cells

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Abstract

As dipyranylidenes are excellent hole carriers, applications in organic solar cells or organic light emitting diode are envisaged. In the present study, we investigate the morphology of 2,2′,6,6′-tetraphenyl-4,4′-dipyranylidene (DIPO-Ph$_4$) deposited under vacuum on a silicon nitride (Si$_3$N$_4$) substrate, a paradigmatic system for the study of molecular crystal/inorganic substrate interfaces. Samples with various coating ratios and different thermal treatments were prepared. The films were characterized by atomic force microscopy and scanning transmission X-ray microscopy to gain insight into material growth. The results show a change in orientation at a molecular level depending upon the evaporation conditions. We are now able to tailor an organic layer with a specific molecular orientation and a specific electronic behavior.
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cea-01659809 , version 1 (17-01-2018)

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Quentin Arnoux, Benjamin Watts, Sufal Swaraj, Francois Rochet, Ludovic Tortech. X-ray microscopic investigation of molecular orientation in a hole carrier thin film for organic solar cells. Nano Research, 2017, 5, pp.2771-2782. ⟨10.1007/s12274-017-1907-6⟩. ⟨cea-01659809⟩
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