Solid-state red emissive carbon dots based on high boiling point solvents for white light-emitting diodes
Summary: A simple and rapid one-step microwave-assisted method was employed to synthesize solid-state red emissive carbon dots (R-CDs) using phloroglucinol, urea, and ammonium fluoride in a high-boiling point solvent. Raw material ratios and solvent types were investigated. The optimal emission of R...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-04-01
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| Series: | iScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004225005115 |
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| author | Jiangchen Wu Qiang Li Xinghua Liu Jingxia Zheng Lin Chen Yongzhen Yang Chunhui Su |
| author_facet | Jiangchen Wu Qiang Li Xinghua Liu Jingxia Zheng Lin Chen Yongzhen Yang Chunhui Su |
| author_sort | Jiangchen Wu |
| collection | DOAJ |
| description | Summary: A simple and rapid one-step microwave-assisted method was employed to synthesize solid-state red emissive carbon dots (R-CDs) using phloroglucinol, urea, and ammonium fluoride in a high-boiling point solvent. Raw material ratios and solvent types were investigated. The optimal emission of R-CDs at 625 nm was achieved when the molar ratio was 3:1:6 in a 50% N, N-dimethyl formamide/water for 15 min. When formamide and water (v/v = 5:95) were used, R-CDs with longer emission (640 nm) were obtained and the reaction time was shortened to 3 min, enhancing both efficiency and cost-effectiveness. Both R-CDs maintained >96% fluorescence intensity after UV exposure and <5% weight loss at 200°C. Combined with polyvinyl pyrrolidone, R-CDs baesed red LEDs with CIE coordinates (0.67, 0.33) and (0.62, 0.38) were achieved. Combined with blue/green CDs, white LEDs showed color rendering indexes of 91–92. This study advances solid-state red CDs for high-quality white LEDs. |
| format | Article |
| id | doaj-art-cb9db71259f64ad592634ea9ab3a7a91 |
| institution | DOAJ |
| issn | 2589-0042 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj-art-cb9db71259f64ad592634ea9ab3a7a912025-08-20T03:07:58ZengElsevieriScience2589-00422025-04-0128411225010.1016/j.isci.2025.112250Solid-state red emissive carbon dots based on high boiling point solvents for white light-emitting diodesJiangchen Wu0Qiang Li1Xinghua Liu2Jingxia Zheng3Lin Chen4Yongzhen Yang5Chunhui Su6School of Material Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China; Corresponding authorKey Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, ChinaKey Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, ChinaKey Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, ChinaKey Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, ChinaKey Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China; Corresponding authorSchool of Material Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China; Corresponding authorSummary: A simple and rapid one-step microwave-assisted method was employed to synthesize solid-state red emissive carbon dots (R-CDs) using phloroglucinol, urea, and ammonium fluoride in a high-boiling point solvent. Raw material ratios and solvent types were investigated. The optimal emission of R-CDs at 625 nm was achieved when the molar ratio was 3:1:6 in a 50% N, N-dimethyl formamide/water for 15 min. When formamide and water (v/v = 5:95) were used, R-CDs with longer emission (640 nm) were obtained and the reaction time was shortened to 3 min, enhancing both efficiency and cost-effectiveness. Both R-CDs maintained >96% fluorescence intensity after UV exposure and <5% weight loss at 200°C. Combined with polyvinyl pyrrolidone, R-CDs baesed red LEDs with CIE coordinates (0.67, 0.33) and (0.62, 0.38) were achieved. Combined with blue/green CDs, white LEDs showed color rendering indexes of 91–92. This study advances solid-state red CDs for high-quality white LEDs.http://www.sciencedirect.com/science/article/pii/S2589004225005115Optical materialsPhotonicsMaterials synthesis |
| spellingShingle | Jiangchen Wu Qiang Li Xinghua Liu Jingxia Zheng Lin Chen Yongzhen Yang Chunhui Su Solid-state red emissive carbon dots based on high boiling point solvents for white light-emitting diodes iScience Optical materials Photonics Materials synthesis |
| title | Solid-state red emissive carbon dots based on high boiling point solvents for white light-emitting diodes |
| title_full | Solid-state red emissive carbon dots based on high boiling point solvents for white light-emitting diodes |
| title_fullStr | Solid-state red emissive carbon dots based on high boiling point solvents for white light-emitting diodes |
| title_full_unstemmed | Solid-state red emissive carbon dots based on high boiling point solvents for white light-emitting diodes |
| title_short | Solid-state red emissive carbon dots based on high boiling point solvents for white light-emitting diodes |
| title_sort | solid state red emissive carbon dots based on high boiling point solvents for white light emitting diodes |
| topic | Optical materials Photonics Materials synthesis |
| url | http://www.sciencedirect.com/science/article/pii/S2589004225005115 |
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