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A yellow carbon dots-based phosphor with high efficiency for white light-emitting devices
Cao, Mengmeng; Xia, Chao; Xia, Jinfeng; Jiang, Danyu; Yu, Caiyan; Li, Huili
2019
Source PublicationJOURNAL OF LUMINESCENCE
ISSN0022-2313
Volume206Pages:97
SubtypeArticle
AbstractThe yellow-emitting carbon dots (CDs) were successfully synthesized by a simple one-step hydrothermal route using o-phenylenediamine (o-PD) as the starting material. The emssion peak of CDs shifted from 535 to 563 nm and the corresponding photoluminescence quantum yield (PLQY) enhanced from 10.4% to 23.1% when the reaction solvent of ethanol was replaced by deionized water and reaction temperature was increased by 20 degrees C. After CDs were effectively and uniformly attached to starch particles by hydrogen bonding and physical adsorption, a new type of environmentally friendly and yellow CDs-based phosphors has been developed. Effective dispersion of small CDs on the surface of large starch particles can lengthen the distance among CDs, as a result, the non-radiative decay process and photoluminescence quenching were steadily hindered. Highly efficient solid-state CDs phosphors with a PLQY of 66.9% were acquired. Combing with the excellent thermal stability and photostability, a daylight white LED based on a single color converter of yellow CDs phosphors was fabricated with a CRI of 83, luminous efficiency of 30.54 lm/W, and CIE coordinates of (0.3429, 0.2817). Suggesting that as-prepared CDs-based phosphors have a great potential in phosphor-based light-emitting devices.
KeywordCarbon dots Solid-state phosphors Starch White LEDs
DOI10.1016/j.jlumin.2018.10.056
WOS KeywordTURN-OFF/ON METHOD ; ONE-STEP SYNTHESIS ; RAMAN-SPECTROSCOPY ; FLUORESCENT-PROBES ; GREEN SYNTHESIS ; NANODOTS ; STARCH ; EMISSION ; LUMINESCENCE ; PHOTOLUMINESCENCE
Language英语
WOS Research AreaOptics
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27555
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Cao, Mengmeng,Xia, Chao,Xia, Jinfeng,et al. A yellow carbon dots-based phosphor with high efficiency for white light-emitting devices[J]. JOURNAL OF LUMINESCENCE,2019,206:97.
APA Cao, Mengmeng,Xia, Chao,Xia, Jinfeng,Jiang, Danyu,Yu, Caiyan,&Li, Huili.(2019).A yellow carbon dots-based phosphor with high efficiency for white light-emitting devices.JOURNAL OF LUMINESCENCE,206,97.
MLA Cao, Mengmeng,et al."A yellow carbon dots-based phosphor with high efficiency for white light-emitting devices".JOURNAL OF LUMINESCENCE 206(2019):97.
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