Direct blending of multicolor carbon quantum dots into fluorescent films for white light emitting diodes with an adjustable correlated color temperature
White light-emitting diodes (WLEDs) with a high color rendering index (CRI) and an adjustable correlated color temperature (CCT) are of great importance in a wide range of fields. We report an efficient method to fabricate WLEDs with prominent CCT performance by the combination of multi-colour carbo...
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| Veröffentlicht in: | Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2019, Vol.7 (6), p.1502-1509 |
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| container_title | Journal of materials chemistry. C, Materials for optical and electronic devices |
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| creator | Ding, Yuanfei Zheng, Jingxia Wang, Junli Yang, Yongzhen Liu, Xuguang |
| description | White light-emitting diodes (WLEDs) with a high color rendering index (CRI) and an adjustable correlated color temperature (CCT) are of great importance in a wide range of fields. We report an efficient method to fabricate WLEDs with prominent CCT performance by the combination of multi-colour carbon quantum dots (CQDs). Long-wavelength CQDs with green, yellow and orange emission (denoted as G-, Y-, and O-CQDs, respectively) were obtained by a one-pot solvothermal reaction between phthalic acid and
o
-phenylenediamine followed by precise separation by silica column chromatography. Systematic investigation and detailed characterization demonstrate that G- and Y-CQDs emit mainly due to the quantum size effect, while the photoluminescence emission of O-CQDs is mainly derived from surface defect states formed by surface oxidation. Subsequently, solid-state luminous red-green-blue CQD films obtained by using tri-functional blue emitting CQDs (phosphors, dispersants and curing agents) lead to UV-pumped WLEDs with good color stability and a high CRI (83–88) as well as an adjustable CCT (3466–7368 K). This work has opened up new avenues for the development of low-cost, environmentally-friendly and high-performance CQD phosphor-based WLEDs. |
| doi_str_mv | 10.1039/C8TC04887H |
| format | Article |
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o
-phenylenediamine followed by precise separation by silica column chromatography. Systematic investigation and detailed characterization demonstrate that G- and Y-CQDs emit mainly due to the quantum size effect, while the photoluminescence emission of O-CQDs is mainly derived from surface defect states formed by surface oxidation. Subsequently, solid-state luminous red-green-blue CQD films obtained by using tri-functional blue emitting CQDs (phosphors, dispersants and curing agents) lead to UV-pumped WLEDs with good color stability and a high CRI (83–88) as well as an adjustable CCT (3466–7368 K). This work has opened up new avenues for the development of low-cost, environmentally-friendly and high-performance CQD phosphor-based WLEDs.</description><identifier>ISSN: 2050-7526</identifier><identifier>EISSN: 2050-7534</identifier><identifier>DOI: 10.1039/C8TC04887H</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Carbon ; Color temperature ; Column chromatography ; Curing agents ; Diodes ; Dispersants ; Emission ; Fluorescence ; Optical properties ; Organic light emitting diodes ; Oxidation ; Phenylenediamine ; Phosphors ; Photoluminescence ; Quantum dots ; Silicon dioxide ; Size effects ; Structural analysis ; Surface defects ; White light</subject><ispartof>Journal of materials chemistry. C, Materials for optical and electronic devices, 2019, Vol.7 (6), p.1502-1509</ispartof><rights>Copyright Royal Society of Chemistry 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c259t-8fed039c54c0b0d3421a6fd2adc4b4d184fa1e28376b952fb40bf4c4cc00399a3</citedby><cites>FETCH-LOGICAL-c259t-8fed039c54c0b0d3421a6fd2adc4b4d184fa1e28376b952fb40bf4c4cc00399a3</cites><orcidid>0000-0003-0566-4802 ; 0000-0002-3295-3813</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,4024,27923,27924,27925</link.rule.ids></links><search><creatorcontrib>Ding, Yuanfei</creatorcontrib><creatorcontrib>Zheng, Jingxia</creatorcontrib><creatorcontrib>Wang, Junli</creatorcontrib><creatorcontrib>Yang, Yongzhen</creatorcontrib><creatorcontrib>Liu, Xuguang</creatorcontrib><title>Direct blending of multicolor carbon quantum dots into fluorescent films for white light emitting diodes with an adjustable correlated color temperature</title><title>Journal of materials chemistry. C, Materials for optical and electronic devices</title><description>White light-emitting diodes (WLEDs) with a high color rendering index (CRI) and an adjustable correlated color temperature (CCT) are of great importance in a wide range of fields. We report an efficient method to fabricate WLEDs with prominent CCT performance by the combination of multi-colour carbon quantum dots (CQDs). Long-wavelength CQDs with green, yellow and orange emission (denoted as G-, Y-, and O-CQDs, respectively) were obtained by a one-pot solvothermal reaction between phthalic acid and
o
-phenylenediamine followed by precise separation by silica column chromatography. Systematic investigation and detailed characterization demonstrate that G- and Y-CQDs emit mainly due to the quantum size effect, while the photoluminescence emission of O-CQDs is mainly derived from surface defect states formed by surface oxidation. Subsequently, solid-state luminous red-green-blue CQD films obtained by using tri-functional blue emitting CQDs (phosphors, dispersants and curing agents) lead to UV-pumped WLEDs with good color stability and a high CRI (83–88) as well as an adjustable CCT (3466–7368 K). This work has opened up new avenues for the development of low-cost, environmentally-friendly and high-performance CQD phosphor-based WLEDs.</description><subject>Carbon</subject><subject>Color temperature</subject><subject>Column chromatography</subject><subject>Curing agents</subject><subject>Diodes</subject><subject>Dispersants</subject><subject>Emission</subject><subject>Fluorescence</subject><subject>Optical properties</subject><subject>Organic light emitting diodes</subject><subject>Oxidation</subject><subject>Phenylenediamine</subject><subject>Phosphors</subject><subject>Photoluminescence</subject><subject>Quantum dots</subject><subject>Silicon dioxide</subject><subject>Size effects</subject><subject>Structural analysis</subject><subject>Surface defects</subject><subject>White light</subject><issn>2050-7526</issn><issn>2050-7534</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNpFkE9Lw0AQxYMoWGovfoIBb0J0k2ySzVHinwoFL_UcNruz7ZYk2-5OKH4TP64pFZ3LzOE37_FeFN0m7CFhWfVYi3XNuBDl8iKapSxncZln_PLvTovraBHCjk0jkkIU1Sz6frYeFUHb4aDtsAFnoB87ssp1zoOSvnUDHEY50NiDdhTADuTAdKPzGBQOBMZ2fQAz4cetJYTObrYE2Fuik6K2TmOAo6UtyAGk3o2B5GQIynmPnSTUcLYj7PfoJY0eb6IrI7uAi989jz5fX9b1Ml59vL3XT6tYpXlFsTCop-wq54q1TGc8TWRhdCq14i3XieBGJpiKrCzaKk9Ny1lruOJKsemtktk8ujvr7r07jBio2bnRD5NlkyZlUZVTeWKi7s-U8i4Ej6bZe9tL_9UkrDmV3_yXn_0Ab256-w</recordid><startdate>2019</startdate><enddate>2019</enddate><creator>Ding, Yuanfei</creator><creator>Zheng, Jingxia</creator><creator>Wang, Junli</creator><creator>Yang, Yongzhen</creator><creator>Liu, Xuguang</creator><general>Royal Society of Chemistry</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-0566-4802</orcidid><orcidid>https://orcid.org/0000-0002-3295-3813</orcidid></search><sort><creationdate>2019</creationdate><title>Direct blending of multicolor carbon quantum dots into fluorescent films for white light emitting diodes with an adjustable correlated color temperature</title><author>Ding, Yuanfei ; Zheng, Jingxia ; Wang, Junli ; Yang, Yongzhen ; Liu, Xuguang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c259t-8fed039c54c0b0d3421a6fd2adc4b4d184fa1e28376b952fb40bf4c4cc00399a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Carbon</topic><topic>Color temperature</topic><topic>Column chromatography</topic><topic>Curing agents</topic><topic>Diodes</topic><topic>Dispersants</topic><topic>Emission</topic><topic>Fluorescence</topic><topic>Optical properties</topic><topic>Organic light emitting diodes</topic><topic>Oxidation</topic><topic>Phenylenediamine</topic><topic>Phosphors</topic><topic>Photoluminescence</topic><topic>Quantum dots</topic><topic>Silicon dioxide</topic><topic>Size effects</topic><topic>Structural analysis</topic><topic>Surface defects</topic><topic>White light</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ding, Yuanfei</creatorcontrib><creatorcontrib>Zheng, Jingxia</creatorcontrib><creatorcontrib>Wang, Junli</creatorcontrib><creatorcontrib>Yang, Yongzhen</creatorcontrib><creatorcontrib>Liu, Xuguang</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of materials chemistry. C, Materials for optical and electronic devices</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ding, Yuanfei</au><au>Zheng, Jingxia</au><au>Wang, Junli</au><au>Yang, Yongzhen</au><au>Liu, Xuguang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Direct blending of multicolor carbon quantum dots into fluorescent films for white light emitting diodes with an adjustable correlated color temperature</atitle><jtitle>Journal of materials chemistry. C, Materials for optical and electronic devices</jtitle><date>2019</date><risdate>2019</risdate><volume>7</volume><issue>6</issue><spage>1502</spage><epage>1509</epage><pages>1502-1509</pages><issn>2050-7526</issn><eissn>2050-7534</eissn><abstract>White light-emitting diodes (WLEDs) with a high color rendering index (CRI) and an adjustable correlated color temperature (CCT) are of great importance in a wide range of fields. We report an efficient method to fabricate WLEDs with prominent CCT performance by the combination of multi-colour carbon quantum dots (CQDs). Long-wavelength CQDs with green, yellow and orange emission (denoted as G-, Y-, and O-CQDs, respectively) were obtained by a one-pot solvothermal reaction between phthalic acid and
o
-phenylenediamine followed by precise separation by silica column chromatography. Systematic investigation and detailed characterization demonstrate that G- and Y-CQDs emit mainly due to the quantum size effect, while the photoluminescence emission of O-CQDs is mainly derived from surface defect states formed by surface oxidation. Subsequently, solid-state luminous red-green-blue CQD films obtained by using tri-functional blue emitting CQDs (phosphors, dispersants and curing agents) lead to UV-pumped WLEDs with good color stability and a high CRI (83–88) as well as an adjustable CCT (3466–7368 K). This work has opened up new avenues for the development of low-cost, environmentally-friendly and high-performance CQD phosphor-based WLEDs.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/C8TC04887H</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0003-0566-4802</orcidid><orcidid>https://orcid.org/0000-0002-3295-3813</orcidid></addata></record> |
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| identifier | ISSN: 2050-7526 |
| ispartof | Journal of materials chemistry. C, Materials for optical and electronic devices, 2019, Vol.7 (6), p.1502-1509 |
| issn | 2050-7526 2050-7534 |
| language | eng |
| recordid | cdi_proquest_journals_2176972058 |
| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Carbon Color temperature Column chromatography Curing agents Diodes Dispersants Emission Fluorescence Optical properties Organic light emitting diodes Oxidation Phenylenediamine Phosphors Photoluminescence Quantum dots Silicon dioxide Size effects Structural analysis Surface defects White light |
| title | Direct blending of multicolor carbon quantum dots into fluorescent films for white light emitting diodes with an adjustable correlated color temperature |
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