University of Oulu

Ghosh, S.K., Waziri, I., Bo, M. et al. Organic molecule functionalized lead sulfide hybrid system for energy storage and field dependent polarization performances. Sci Rep 12, 19280 (2022).

Organic molecule functionalized lead sulfide hybrid system for energy storage and field dependent polarization performances

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Author: Ghosh, Sarit K.1; Waziri, Ibrahim1; Bo, Maolin2;
Organizations: 1Department of Chemical Sciences, University of Johannesburg, P.O. Box: 524, Auckland Park, 2006, South Africa
2Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM) of Chongqing, Yangtze Normal University, Chongqing, 408100, China
3Nano and Molecular Systems Research Unit, University of Oulu, 90014, Oulu, Finland
4Department of Chemistry, School of Physical Sciences, Mahatma Gandhi Central University, Motihari, 845401, India
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 5.2 MB)
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Language: English
Published: Springer Nature, 2022
Publish Date: 2023-05-03


A wet chemical route is reported for synthesising organic molecule stabilized lead sulfide nanoparticles. The dielectric capacitance, energy storage performances and field-driven polarization of the organic–inorganic hybrid system are investigated in the form of a device under varying temperature and frequency conditions. The structural analysis confirmed the formation of the monoclinic phase of lead sulfide within the organic network. The band structure of lead sulfide was obtained by density functional theory calculation that supported the semiconductor nature of the material with a direct band gap of 2.27 eV. The dielectric performance of the lead sulfide originated due to the dipolar and the space charge polarization. The energy storage ability of the material was investigated under DC-bias conditions, and the device exhibited the power density values 30 W/g and 340 W/g at 100 Hz and 10 kHz, respectively. The electric field-induced polarization study exhibited a fatigue-free behaviour of the device for 10³ cycles with a stable dielectric strength. The study revealed that the lead sulfide-based system has potential in energy storage applications.

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Series: Scientific reports
ISSN: 2045-2322
ISSN-E: 2045-2322
ISSN-L: 2045-2322
Volume: 12
Issue: 1
Article number: 19280
DOI: 10.1038/s41598-022-23909-z
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: This study was financially supported by the Faculty of Science, University of Johannesburg.
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