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      https://www.ias.ac.in/article/fulltext/boms/043/0174

    • Keywords

       

      Exciton diffusion; encapsulated polymer nanoparticles; electron and hole acceptor.

    • Abstract

       

      Exciton generation, migration and dissociation are key fundamental processes that dictate the efficiency of optoelectronic devices. Here, we investigate exciton diffusion process of conjugated polymer nanoparticles (PNPs) in the presence of electron and hole scavenger molecules using time-resolved spectroscopy. We found that the exciton diffusion length of hole transporting PNPs, decreases in the presence of hole scavenger molecule and it increases in the presence of electron scavenger molecule. Analysis reveals that the diffusivity of excitons can be controlled by changing the nature of scavenger molecules. Such fundamental study is important for developing devices where lower and higher exciton diffusivities are required depending on the requirement of application mode.

    • Author Affiliations

       

      ARNAB GHOSH1 BIKASH JANA1 AJEET KUMAR2 SRIJON GHOSH1 AMITAVA PATRA1

      1. School of Materials Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
      2. Indian Institute of Science Education and Research, Mohali 140306, India
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