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Effect of Forster resonance energy transfer on the photoluminescence of PPy-ZnO composite

  • Original Paper: Sol-gel and hybrid materials for optical, photonic and optoelectronic applications
  • Published:
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Abstract

The structural and optical properties of polypyrrole-ZnO (PPy-ZnO) composites with different amount of ZnO are investigated. The nature of optical absorption and emission of the composites having agglomerated granular morphology is explored. Addition of ZnO slightly affects the conjugation of the polymer chain due to which the π-π* transition of PPy-ZnO composite shows some blue shift in the UV-Vis absorption spectra. The photoluminescence intensity of PPy-ZnO nanocomposite varies with variation of ZnO content. This tunability in the photoluminescence intensity of PPy-ZnO nanocomposite can be understood in terms of Forster Resonance Energy transfer (FRET) from ZnO (donor) to PPy (acceptor). The energy transfer efficiency, Forster radius and separation between donor and acceptor are predicted theoretically by using a FRET model. With the change in donor concentration, the energy transfer efficiency changes which affects the emission intensity of composites. The highest emission intensity is observed for 1.22 g of ZnO which indicates the highest energy transfer between ZnO and PPy. Thus, by tuning ZnO content the emission properties of the PPy-ZnO composite can be tuned.

Highlights

  • Semiconducting PPy-ZnO composites are synthesised here with different amount of ZnO.

  • Enhanced photoluminescence is obtained in composite as compared to pristine PPy.

  • FRET from ZnO to PPy is responsible for the PL enhancement.

  • Blue emission from all the composites is observed.

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Acknowledgements

We thank Central Research Facility (CRF) of IIT (ISM), Dhanbad for providing experimental facilities of SEM, UV-Vis-NIR spectrophotometer. We also acknowledge DST-FIST facility (Project No. SR/FST/PSI-004/2013) for using lifetime spectrometer. This work was financially supported by IIT(ISM), Dhanbad, India.

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  1. Micro and Nanoscience Lab, Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, India

    Smita Dey & Asit Kumar Kar

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  1. Smita Dey
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  2. Asit Kumar Kar
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Correspondence to Smita Dey.

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Dey, S., Kar, A.K. Effect of Forster resonance energy transfer on the photoluminescence of PPy-ZnO composite. J Sol-Gel Sci Technol 102, 679–687 (2022). https://doi.org/10.1007/s10971-021-05621-y

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  • DOI: https://doi.org/10.1007/s10971-021-05621-y

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