Clustering‐Induced White Light Emission from Carbonized Polymer Dots
Despite the advancements in synthetic methods, it is still challenging to prepare white light‐emitting carbon dots for solid‐state white light‐emitting diodes (LEDs). Herein, the synthesis and characterization of a carbonized polymer dot (CPD) that emits white light in the solid state are presented....
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2021-05-01
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| Series: | Advanced Photonics Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/adpr.202000161 |
| _version_ | 1818741397341077504 |
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| author | Bin Liu Zheng Chen Bo Chu Ya-Ling Wang Ning Li Huinian Zhang Yongzhen Yang Shengliang Hu Xing-Hong Zhang |
| author_facet | Bin Liu Zheng Chen Bo Chu Ya-Ling Wang Ning Li Huinian Zhang Yongzhen Yang Shengliang Hu Xing-Hong Zhang |
| author_sort | Bin Liu |
| collection | DOAJ |
| description | Despite the advancements in synthetic methods, it is still challenging to prepare white light‐emitting carbon dots for solid‐state white light‐emitting diodes (LEDs). Herein, the synthesis and characterization of a carbonized polymer dot (CPD) that emits white light in the solid state are presented. The reaction of an oxygen‐rich precursor, trimethylolpropane tri(cyclic carbonate) ether, with nitrogen‐rich melamine in an alcohol via a single‐step solvothermal method affords CPDs with hydroxyurethane and CN groups. The morphology of the CPDs can be regulated by changing the reaction time. Transmission electron microscopy reveals structural evolution from flocculent polymers to dandelion‐like and spherical particles with an increase in the carbonization time from 6 to 12 and 18 h, respectively. The dandelion‐like CPDs exhibit a relatively high quantum yield of 7.5% in the solid state, which is ascribed to the abundant surface poly(hydroxyurethane) chains that restrict the aggregation‐caused quenching of luminescence. It is proposed that multiple coexistent clusters generate different emission sites, thereby leading to white light emission. Loose clusters formed from hydroxyurethane and CN bonds, which have a low degree of conjugation, emit blue light, whereas compact clusters generated through interactions between the hydroxyurethane and CN bonds of poly(hydroxyurethane) and carbon cores emit yellow light. |
| first_indexed | 2024-12-18T01:55:58Z |
| format | Article |
| id | doaj.art-dc8c55afe3804d7d8a323514a0ae3830 |
| institution | Directory Open Access Journal |
| issn | 2699-9293 |
| language | English |
| last_indexed | 2024-12-18T01:55:58Z |
| publishDate | 2021-05-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Photonics Research |
| spelling | doaj.art-dc8c55afe3804d7d8a323514a0ae38302022-12-21T21:24:55ZengWiley-VCHAdvanced Photonics Research2699-92932021-05-0125n/an/a10.1002/adpr.202000161Clustering‐Induced White Light Emission from Carbonized Polymer DotsBin Liu0Zheng Chen1Bo Chu2Ya-Ling Wang3Ning Li4Huinian Zhang5Yongzhen Yang6Shengliang Hu7Xing-Hong Zhang8School of Energy and Power Engineering North University of China Taiyuan 030051 P. R. ChinaMOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P. R. ChinaMOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P. R. ChinaSchool of Energy and Power Engineering North University of China Taiyuan 030051 P. R. ChinaSchool of Energy and Power Engineering North University of China Taiyuan 030051 P. R. ChinaSchool of Energy and Power Engineering North University of China Taiyuan 030051 P. R. ChinaMOE Key Laboratory of Interface Science and Engineering in Advanced Materials Research Centre on Advanced Materials Science and Technology Taiyuan University of Technology Taiyuan 030024 P. R. ChinaSchool of Energy and Power Engineering North University of China Taiyuan 030051 P. R. ChinaMOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P. R. ChinaDespite the advancements in synthetic methods, it is still challenging to prepare white light‐emitting carbon dots for solid‐state white light‐emitting diodes (LEDs). Herein, the synthesis and characterization of a carbonized polymer dot (CPD) that emits white light in the solid state are presented. The reaction of an oxygen‐rich precursor, trimethylolpropane tri(cyclic carbonate) ether, with nitrogen‐rich melamine in an alcohol via a single‐step solvothermal method affords CPDs with hydroxyurethane and CN groups. The morphology of the CPDs can be regulated by changing the reaction time. Transmission electron microscopy reveals structural evolution from flocculent polymers to dandelion‐like and spherical particles with an increase in the carbonization time from 6 to 12 and 18 h, respectively. The dandelion‐like CPDs exhibit a relatively high quantum yield of 7.5% in the solid state, which is ascribed to the abundant surface poly(hydroxyurethane) chains that restrict the aggregation‐caused quenching of luminescence. It is proposed that multiple coexistent clusters generate different emission sites, thereby leading to white light emission. Loose clusters formed from hydroxyurethane and CN bonds, which have a low degree of conjugation, emit blue light, whereas compact clusters generated through interactions between the hydroxyurethane and CN bonds of poly(hydroxyurethane) and carbon cores emit yellow light.https://doi.org/10.1002/adpr.202000161carbonized polymer dotsclustershydroxyurethaneswhite light emission |
| spellingShingle | Bin Liu Zheng Chen Bo Chu Ya-Ling Wang Ning Li Huinian Zhang Yongzhen Yang Shengliang Hu Xing-Hong Zhang Clustering‐Induced White Light Emission from Carbonized Polymer Dots Advanced Photonics Research carbonized polymer dots clusters hydroxyurethanes white light emission |
| title | Clustering‐Induced White Light Emission from Carbonized Polymer Dots |
| title_full | Clustering‐Induced White Light Emission from Carbonized Polymer Dots |
| title_fullStr | Clustering‐Induced White Light Emission from Carbonized Polymer Dots |
| title_full_unstemmed | Clustering‐Induced White Light Emission from Carbonized Polymer Dots |
| title_short | Clustering‐Induced White Light Emission from Carbonized Polymer Dots |
| title_sort | clustering induced white light emission from carbonized polymer dots |
| topic | carbonized polymer dots clusters hydroxyurethanes white light emission |
| url | https://doi.org/10.1002/adpr.202000161 |
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