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    Carbon nanodot-based heterostructures for improving the charge separation and the photocurrent generation

    Year: 2019

    Journal: Nanoscale, Volume 11, 1-Apr, page 7414–7423

    Authors: Bettini, Simona; Sawalha, Shadi; Carbone, Luigi; Giancane, Gabriele; Prato, Maurizio; Valli, Ludovico

    Organizations: FutureInResearch APQ Ricerca Regione Puglia; Programma Operativo Nazionale FSE-FESR Ricerca e Innovazione 2015-2020 - Asse prioritario I "Investimenti in Capitale Umano" - Azione I. 1 - " Dottorati Innovativi con caratterizzazione industriale", XXXII

    The possibility to employ carbon nanodots (CNDs) in solar devices was exploited by combining them with a fulleropyrrolidine derivative (FP2). The interaction between the two species was promoted by the presence of opposite electrostatic charges on CNDs (negatively charged) and FP2 (positively charged). The supramolecular dyad CNDs/FP2 generation was induced at the air/water interface of a Langmuir trough: water soluble CNDs were dissolved in the subphase and FP2 chloroform solution was spread on the subphase; the electrostatic interaction promoted the formation of the supramolecular adduct FP2/CNDs, which was then transferred onto solid substrates. Photo-induced charge transfer was promoted in the FP2/CNDs dyad and we demonstrated that the presence of CNDs increased the short-circuit current density, under light illumination, of a porphyrin-FP2/CNDs thin film by about 300% when compared with a more traditional porphyrin-FP2 solar device.
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