Tuning optical properties of CsPbBr3 perovskite nanocrystals through silver doping

All-inorganic perovskite nanocrystals have emerged as an alternative for hybrid organic–inorganic perovskite for optoelectronic applications because of their unique optical, electrical properties and higher chemical stability. Doping of metal or metal nanoparticles into all-inorganic perovskite nano...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2022, Vol.33 (3), p.1324-1336
Main Authors: Krishna, B. Gopal, Ghosh, Dhriti Sundar, Tiwari, Sanjay
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Doping
Electrical properties
Materials Science
Nanocrystals
Nanoparticles
Optical and Electronic Materials
Optical properties
Optoelectronic devices
Perovskites
Photoluminescence
Raman spectroscopy
Silver
Spectrum analysis
Surface defects
Surface plasmon resonance
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Summary:All-inorganic perovskite nanocrystals have emerged as an alternative for hybrid organic–inorganic perovskite for optoelectronic applications because of their unique optical, electrical properties and higher chemical stability. Doping of metal or metal nanoparticles into all-inorganic perovskite nanocrystals can modify or tune optical properties. In this paper, Ag-CsPbBr 3 nanocrystals were synthesized by the hot injection method. The influence of doped silver on the optical properties of CsPbBr 3 nanocrystals is analyzed by ultraviolet spectroscopy, PL spectroscopy, and Raman spectroscopy. There is an enhancement in the PL intensity and Raman intensity of Ag-CsPbBr 3 nanocrystals as compared to pristine CsPbBr 3 nanocrystals. The enhancement in the photoluminescence intensity and Raman intensity of Ag-CsPbBr 3 nanocrystals is due to localized surface plasmon resonance coupling between the doped silver and CsPbBr 3 nanocrystals. The photoluminescence intensity of Ag-CsPbBr 3 nanocrystals is quenched due to excessive doping concentration of silver and spectral self-absorption of the silver nanoparticle surface plasmon resonance. The silver ions play an important role in passivating surface defect states of CsPbBr 3 nanocrystals. The passivation of surface defect states improved the photoluminescence quantum yield and PL lifetime of the CsPbBr 3 nanocrystals. The study of Ag-CsPbBr 3 nanocrystals provides a new perspective for the future development of efficient and stable optoelectronic devices.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-021-07447-4