Excellent color rendering index single system white light emitting carbon dots for next generation lighting devices

Abstract Recently, quantum dots (QDs) are finding enormous application in white light emitting diodes (WLEDs) and WLEDs with high color rendition are in high demand. QD-WLEDs use different color (Red, Blue, Green) emitting QDs to obtain white light. Use of different color emitting QDs affect purity...

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Autores principales:	Manasa Perikala, Asha Bhardwaj
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2bffa5d0be09478da9d0d4355387a85d
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spelling	oai:doaj.org-article:2bffa5d0be09478da9d0d4355387a85d2021-12-02T15:56:49ZExcellent color rendering index single system white light emitting carbon dots for next generation lighting devices10.1038/s41598-021-91074-w2045-2322https://doaj.org/article/2bffa5d0be09478da9d0d4355387a85d2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91074-whttps://doaj.org/toc/2045-2322Abstract Recently, quantum dots (QDs) are finding enormous application in white light emitting diodes (WLEDs) and WLEDs with high color rendition are in high demand. QD-WLEDs use different color (Red, Blue, Green) emitting QDs to obtain white light. Use of different color emitting QDs affect purity of white light due to self-absorption losses and QD degradation, in the long run affecting color rendering index (CRI) of WLEDs. Herein, we report low cost, environment friendly, open air atmosphere synthesis of single system white light emitting carbon dots (CDs) with broad emission bandwidth ranging 116 –143 nm and quantum yields (QY) ~ 5 – 13 % in colloidal state by modifying CD surface. Furthermore, carbon dot polymer phosphor (CD-PDMS phosphor) is fabricated which emits white light under UV illumination with a record emission bandwidth of ~ 154 nm and QY ~ 16 % in solid state. Moreover, CD-PDMS phosphor exhibit excellent color rendering index (CRI) ~ 96, the highest reported so far with CIE co-ordinates (0.31, 0.33) that are quite akin to pure white light. Such high performances are achieved due to high quality of CDs and CD-PDMS polymer phosphors by precise control in passivation/functionalization of nanoparticle surface. This work will set platform for the application of CD-phosphor based WLEDs in lighting systems.Manasa PerikalaAsha BhardwajNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Manasa Perikala Asha Bhardwaj Excellent color rendering index single system white light emitting carbon dots for next generation lighting devices
description	Abstract Recently, quantum dots (QDs) are finding enormous application in white light emitting diodes (WLEDs) and WLEDs with high color rendition are in high demand. QD-WLEDs use different color (Red, Blue, Green) emitting QDs to obtain white light. Use of different color emitting QDs affect purity of white light due to self-absorption losses and QD degradation, in the long run affecting color rendering index (CRI) of WLEDs. Herein, we report low cost, environment friendly, open air atmosphere synthesis of single system white light emitting carbon dots (CDs) with broad emission bandwidth ranging 116 –143 nm and quantum yields (QY) ~ 5 – 13 % in colloidal state by modifying CD surface. Furthermore, carbon dot polymer phosphor (CD-PDMS phosphor) is fabricated which emits white light under UV illumination with a record emission bandwidth of ~ 154 nm and QY ~ 16 % in solid state. Moreover, CD-PDMS phosphor exhibit excellent color rendering index (CRI) ~ 96, the highest reported so far with CIE co-ordinates (0.31, 0.33) that are quite akin to pure white light. Such high performances are achieved due to high quality of CDs and CD-PDMS polymer phosphors by precise control in passivation/functionalization of nanoparticle surface. This work will set platform for the application of CD-phosphor based WLEDs in lighting systems.
format	article
author	Manasa Perikala Asha Bhardwaj
author_facet	Manasa Perikala Asha Bhardwaj
author_sort	Manasa Perikala
title	Excellent color rendering index single system white light emitting carbon dots for next generation lighting devices
title_short	Excellent color rendering index single system white light emitting carbon dots for next generation lighting devices
title_full	Excellent color rendering index single system white light emitting carbon dots for next generation lighting devices
title_fullStr	Excellent color rendering index single system white light emitting carbon dots for next generation lighting devices
title_full_unstemmed	Excellent color rendering index single system white light emitting carbon dots for next generation lighting devices
title_sort	excellent color rendering index single system white light emitting carbon dots for next generation lighting devices
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2bffa5d0be09478da9d0d4355387a85d
work_keys_str_mv	AT manasaperikala excellentcolorrenderingindexsinglesystemwhitelightemittingcarbondotsfornextgenerationlightingdevices AT ashabhardwaj excellentcolorrenderingindexsinglesystemwhitelightemittingcarbondotsfornextgenerationlightingdevices
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Excellent color rendering index single system white light emitting carbon dots for next generation lighting devices

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