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      https://www.ias.ac.in/article/fulltext/boms/044/0240

    • Keywords

       

      Tandem structure; interconnecting layer (ICL); thermal annealing; PL quenching.

    • Abstract

       

      Tandem organic solar cells (OSCs), consisting of more than one (usually two) sub-cells, stacked and connected by a charge recombination layer (i.e., interconnecting layer (ICL)), are highly promising to boost OSC efficiency. The ICL plays a critical role in regulating the performance of tandem device. Here, we report ZnO or C$_{60}$ as a simple ICL, modified then, by a PEDOT:PSS layer, can act as an efficient ICLs in tandem device to achieve a significant increase in performance compared to single sub-cell. After optimized optical properties of MEH-PPV:PC$_{70}$BM and P3HT:PC$_{70}$BM sub-cells by varying the annealing temperature, these ICLs are used to connect photoactive layers. For all tandem devices, we showed an improvement in optical properties, especially in the ground and excited states compared to optimized single sub-cells. The degree of improved performance in tandem devices is attributed to the connection which provides each ICL. For fully optimized tandem, based on C$_{60}$ ICL, reached ${\sim}$78% enhancement in charge transfer compared to the bottom sub-cell and 82% compared to the top sub-cell, obtained for ${\lambda}_{emission}$ = 650 nm.

    • Author Affiliations

       

      HAMZA BOUZID HAMZA SAIDI1 NADIA CHEHATA ABDELAZIZ BOUAZIZI

      1. Équipe Dispositifs Électroniques Organiques et Photovoltaïque Moléculaire, Laboratoire de la Matière Condensée et des Nanosciences, Faculté des Sciences de Monastir, Université de Monastir, Avenue de l’environnement, 5019 Monastir, Tunisie
    • Dates

       
  • Bulletin of Materials Science | News

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    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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