{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T01:12:52Z","timestamp":1790730772720,"version":"4.1.0"},"reference-count":30,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2023,3,26]],"date-time":"2023-03-26T00:00:00Z","timestamp":1679788800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["21804075"],"award-info":[{"award-number":["21804075"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Qingdao Postdoctoral Applied Research Project","award":["21804075"],"award-info":[{"award-number":["21804075"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>In this work, multicolor fluorescent carbon dots with red (R-CDs), yellow (Y-CDs), and blue (B-CDs) emissions were prepared by choosing proper aromatic precursors with different amounts of benzene rings through a simple solvothermal method. The characterization showed that the prepared carbon dots were spherical with a size under 10 nm, rich surface functional groups, and good stability. The emission wavelengths were located at 440, 530, and 580 nm under the excitation of 370 nm. The relative fluorescence quantum yield (QY) of R-CDs, Y-CDs, and B-CDs was 11%, 59%, and 33%, respectively. The related characterization demonstrated that the redshift in the photoluminescence was caused by the synergistic effect of the increasing graphitic nitrogen content, quantum size effect and surface oxidation state. By mixing the three prepared CDs into a PVA matrix, the transparent and flexible films produced relucent blue, yellow, and red emissions under 365 nm UV light, and solid-state quenching was effectively avoided. LEDs were fabricated by using B-CDs, Y-CDs, and R-CDs\/PVA with a semiconductor chip. These CDs-based LEDs produced bright blue, yellow, and red light with CIE color coordinates of (0.16, 0.02), (0.38, 0.58), and (0.50, 0.49) were successfully manufactured utilizing the prepared blue, yellow and red multicolor carbon dots as the solid luminescent materials. The results showed that the synthesized CDs can be potentially applied in multi-color monitors as a promising candidate for light-emitting diodes (LEDs). This work blazes a novel trail for the controllable preparation of multicolor fluorescent carbon dots.<\/jats:p>","DOI":"10.3390\/molecules28072957","type":"journal-article","created":{"date-parts":[[2023,3,27]],"date-time":"2023-03-27T02:18:27Z","timestamp":1679883507000},"page":"2957","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Blue, Yellow, and Red Carbon Dots from Aromatic Precursors for Light-Emitting Diodes"],"prefix":"10.3390","volume":"28","author":[{"given":"Zhenzhen","family":"Liu","sequence":"first","affiliation":[{"name":"College of Chemistry and Chemical Engineering, Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, Instrumental Analysis Center of Qingdao University, Qingdao University, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaofei","family":"Lu","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering, Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, Instrumental Analysis Center of Qingdao University, Qingdao University, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Menglin","family":"Liu","sequence":"additional","affiliation":[{"name":"Rizhao Custom, Rizhao 276826, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenjing","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering, Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, Instrumental Analysis Center of Qingdao University, Qingdao University, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1413","DOI":"10.1039\/C8NA00329G","article-title":"Temperature-controlled spectral tuning of full-color carbon dots and their strongly fluorescent solid-state polymer composites for light-emitting diodes","volume":"1","author":"Hu","year":"2019","journal-title":"Nanoscale Adv."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Li, H., Kang, Z., Liu, Y., and Lee, S.-T. (2012). Carbon nanodots: Synthesis, properties and applications. J. Mater. Chem., 22.","DOI":"10.1039\/c2jm34690g"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1016\/j.carbon.2022.01.001","article-title":"Tunable full-color solid-state fluorescent carbon dots for light emitting diodes","volume":"190","author":"Wang","year":"2022","journal-title":"Carbon"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"109478","DOI":"10.1016\/j.dyepig.2021.109478","article-title":"Full color fluorescent carbon quantum dots synthesized from triammonium citrate for cell imaging and white LEDs","volume":"193","author":"Chang","year":"2021","journal-title":"Dyes Pigments"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"590","DOI":"10.1016\/j.nantod.2014.09.004","article-title":"Carbon dots\u2014Emerging light emitters for bioimaging, cancer therapy and optoelectronics","volume":"9","author":"Hola","year":"2014","journal-title":"Nano Today"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1007\/s00604-022-05543-8","article-title":"Red-emitting carbon dots aggregates-based fluorescent probe for monitoring Cu(2)","volume":"190","author":"Dong","year":"2022","journal-title":"Mikrochim. Acta"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"131645","DOI":"10.1016\/j.snb.2022.131645","article-title":"Solvent-dependent red emissive carbon dots and their applications in sensing and solid-state luminescence","volume":"360","author":"Wang","year":"2022","journal-title":"Sens. Actuators B Chem."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"9919","DOI":"10.1021\/acsanm.1c02496","article-title":"Multicolor Phenylenediamine Carbon Dots for Metal-Ion Detection with Picomolar Sensitivity","volume":"4","author":"Barhum","year":"2021","journal-title":"ACS Appl. Nano Mater."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"5360","DOI":"10.1002\/anie.201501193","article-title":"Red, green, and blue luminescence by carbon dots: Full-color emission tuning and multicolor cellular imaging","volume":"54","author":"Jiang","year":"2015","journal-title":"Angew. Chem. Int. Ed. Engl."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"4430","DOI":"10.1002\/anie.200906154","article-title":"Water-soluble fluorescent carbon quantum dots and photocatalyst design","volume":"49","author":"Li","year":"2010","journal-title":"Angew. Chem. Int. Ed. Engl."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"e2205099","DOI":"10.1002\/smll.202205099","article-title":"The Emerging Development of Multicolor Carbon Dots","volume":"18","author":"Li","year":"2022","journal-title":"Small"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"7671","DOI":"10.1021\/acs.jpclett.1c01856","article-title":"Theoretical Understanding of Structure-Property Relationships in Luminescence of Carbon Dots","volume":"12","author":"Yu","year":"2021","journal-title":"J. Phys. Chem. Lett."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Yuan, F., Wang, Z., Li, X., Li, Y., Tan, Z., Fan, L., and Yang, S. (2017). Bright Multicolor Bandgap Fluorescent Carbon Quantum Dots for Electroluminescent Light-Emitting Diodes. Adv. Mater., 29.","DOI":"10.1002\/adma.201604436"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1663","DOI":"10.1002\/adma.201405070","article-title":"Photoluminescence-tunable carbon nanodots: Surface-state energy-gap tuning","volume":"27","author":"Bao","year":"2015","journal-title":"Adv. Mater."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"153","DOI":"10.1016\/j.carbon.2017.12.075","article-title":"A solvent-engineered molecule fusion strategy for rational synthesis of carbon quantum dots with multicolor bandgap fluorescence","volume":"130","author":"Zhan","year":"2018","journal-title":"Carbon"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Tian, Z., Zhang, X., Li, D., Zhou, D., Jing, P., Shen, D., Qu, S., Zboril, R., and Rogach, A.L. (2017). Full-Color Inorganic Carbon Dot Phosphors for White-Light-Emitting Diodes. Adv. Opt. Mater., 5.","DOI":"10.1002\/adom.201700416"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"134172","DOI":"10.1016\/j.cej.2021.134172","article-title":"A pH-controlled synthetic route to violet, green, and orange fluorescent carbon dots for multicolor light-emitting diodes","volume":"431","author":"Dai","year":"2022","journal-title":"Chem. Eng. J."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"2210095","DOI":"10.1002\/adfm.202210095","article-title":"Controlled Synthesis of Multicolor Carbon Dots Assisted by Machine Learning","volume":"33","author":"Chen","year":"2022","journal-title":"Adv. Funct. Mater."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"4979","DOI":"10.1039\/D1NJ05981E","article-title":"RGB-multicolor fluorescent carbon dots by changing the reaction solvent type for white light-emitting diodes","volume":"46","author":"Lei","year":"2022","journal-title":"New J. Chem."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"6815","DOI":"10.1007\/s10853-019-03370-6","article-title":"Full-color carbon dots with multiple red-emission tuning: On\/off sensors, in vitro and in vivo multicolor bioimaging","volume":"54","author":"Huo","year":"2019","journal-title":"J. Mater. Sci."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"226","DOI":"10.1002\/smm2.1131","article-title":"Recent advances of carbon dots as new antimicrobial agents","volume":"3","author":"Li","year":"2022","journal-title":"SmartMat"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"312","DOI":"10.1002\/adma.201503380","article-title":"A Self-Quenching-Resistant Carbon-Dot Powder with Tunable Solid-State Fluorescence and Construction of Dual-Fluorescence Morphologies for White Light-Emission","volume":"28","author":"Chen","year":"2016","journal-title":"Adv. Mater."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"3400","DOI":"10.1039\/C5NR08400H","article-title":"Tuneable light-emitting carbon-dot\/polymer flexible films prepared through one-pot synthesis","volume":"8","author":"Bhunia","year":"2016","journal-title":"Nanoscale"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"41552","DOI":"10.1039\/C7RA07736J","article-title":"Solvatochromism of bright carbon dots with tunable long-wavelength emission from green to red and their application as solid-state materials for warm WLEDs","volume":"7","author":"Lin","year":"2017","journal-title":"RSC Adv."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"An, Y., Lin, X., Guo, Z., Yin, Q., Li, Y., Zheng, Y., Shi, Z., Zhang, W., and Liu, C. (2021). Red Emission Carbon Dots Prepared by 1,4-Diaminonaphthalene for Light-Emitting Diode Application and Metal Ion Detection. Materials, 14.","DOI":"10.3390\/ma14164716"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"15914","DOI":"10.1021\/acsanm.2c04130","article-title":"Multicolor and Single-Component White Light-Emitting Carbon Dots from a Single Precursor for Light-Emitting Diodes","volume":"5","author":"Han","year":"2022","journal-title":"ACS Appl. Nano Mater."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"484","DOI":"10.1021\/acsnano.5b05406","article-title":"Full-Color Light-Emitting Carbon Dots with a Surface-State-Controlled Luminescence Mechanism","volume":"10","author":"Ding","year":"2016","journal-title":"ACS Nano"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Da, X., Han, Z., Yang, Z., Zhang, D., Hong, R., Tao, C., Lin, H., and Huang, Y. (2022). Preparation of multicolor carbon dots with high fluorescence quantum yield and application in white LED. Chem. Phys. Lett., 794.","DOI":"10.1016\/j.cplett.2022.139497"},{"key":"ref_29","first-page":"466","article-title":"53% Efficient Red Emissive Carbon Quantum Dots for High Color Rendering and Stable Warm White-Light-Emitting Diodes","volume":"29","author":"Wang","year":"2017","journal-title":"Adv. Mater."},{"key":"ref_30","first-page":"1704548","article-title":"Synthesis of Carbon Dots with Multiple Color Emission by Controlled Graphitization and Surface Functionalization","volume":"30","author":"Miao","year":"2018","journal-title":"Adv. Mater."}],"container-title":["Molecules"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1420-3049\/28\/7\/2957\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T19:03:22Z","timestamp":1760123002000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1420-3049\/28\/7\/2957"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,3,26]]},"references-count":30,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2023,4]]}},"alternative-id":["molecules28072957"],"URL":"https:\/\/doi.org\/10.3390\/molecules28072957","relation":{},"ISSN":["1420-3049"],"issn-type":[{"value":"1420-3049","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,3,26]]}}}