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From Futile to Fruitful: Diesel Soot as White Light Emitter

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Abstract

The present work describes a solution for the effective use of the hazardous particulate matter (diesel soot) from the internal combustion engines (ICEs) as a potential material emitting white light for white light emitting diodes (WLEDs). The washed soot samples are subjected to Field Emission Scanning Electron Microscopy (FESEM), High- Resolution Transmission Electron Microscopy (HR-TEM), Energy Dispersive Spectroscopy (EDS), UV–Visible, Photoluminescent (PL) Spectroscopy and quantum yield measurements. The CIE plot and Correlated Color Temperature (CCT) reveals the white fluorescence on photoexcitation. The sample on ultraviolet (UV) laser excitation, provides a visual confirmation of white light emission from the sample. The diesel soot collected from public transport buses of different years of manufacture invariably exhibit white fluorescence at an excitation of 350 nm. The sample show a quantum yield of 47.09%. The study is significant in the context of pollution and search for low-cost, rare-earth phosphor free material for white light emission and thereby turning the hazardous, futile material into a fruitful material that can be used for potential applications in photonics and electronics.

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Funding

This study was not funded by any agencies in the public, commercial, or not-for-profit sectors.

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  1. Department of Optoelectronics and Department of Nanoscience and Nanotechnology, University of Kerala, Trivandrum, Kerala, India, 695581

    M. S. Swapna & S. Sankararaman

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  1. M. S. Swapna
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  2. S. Sankararaman
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Correspondence to S. Sankararaman.

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Swapna, M.S., Sankararaman, S. From Futile to Fruitful: Diesel Soot as White Light Emitter. J Fluoresc 28, 543–549 (2018). https://doi.org/10.1007/s10895-018-2215-6

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  • DOI: https://doi.org/10.1007/s10895-018-2215-6

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