Ultra‐strong phosphorescence with 48% quantum yield from grinding treated thermal annealed carbon dots and boric acid composite
Abstract Metal‐free room‐temperature phosphorescence (RTP) materials are of great significance for many applications; however, they usually exhibit low efficiency and weak intensity. This article reports a new strategy for the preparation of a high‐efficiency and strong RTP materials from crystallin...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | SmartMat |
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| Online Access: | https://doi.org/10.1002/smm2.1075 |
| _version_ | 1811342610295422976 |
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| author | Qijun Li Zhenxiao Zhao Shuai Meng Yuchen Li Yunyang Zhao Bohan Zhang Zikang Tang Jing Tan Songnan Qu |
| author_facet | Qijun Li Zhenxiao Zhao Shuai Meng Yuchen Li Yunyang Zhao Bohan Zhang Zikang Tang Jing Tan Songnan Qu |
| author_sort | Qijun Li |
| collection | DOAJ |
| description | Abstract Metal‐free room‐temperature phosphorescence (RTP) materials are of great significance for many applications; however, they usually exhibit low efficiency and weak intensity. This article reports a new strategy for the preparation of a high‐efficiency and strong RTP materials from crystalline thermal‐annealed carbon dots (CDs) and boric acid (BA) composite (g‐t‐CD@BA) through grinding‐induced amorphous to crystallization transition. Amorphous thermal‐annealed CDs and BA composite (t‐CD@BA) is prepared following a thermal melting and super‐cooling route, where the CDs are fully dispersed in molten BA liquid and uniformly frozen in an amorphous thermal annealed BA matrix after super‐cooling to room temperature. Upon grinding treatment, the fracture and fragmentation caused by grinding promote the transformation of the high‐energy amorphous state to the lower energy crystalline counterparts. As a result, the CDs are uniformly in situ embedded in the BA crystal matrix. This method affords maximum uniform embedding of the CDs in the BA crystals, decreases nonradiative decay, and promotes intersystem crossing by restraining the free vibration of the CDs, thus producing strong RTP materials with the highest reported phosphorescence quantum yield (48%). Remarkably, RTP from g‐t‐CD@BA powder is strong enough to illuminate items with a delay time exceeding 9 s. |
| first_indexed | 2024-04-13T19:14:01Z |
| format | Article |
| id | doaj.art-b9dc5865bbf8427b938cf66893ff8f97 |
| institution | Directory Open Access Journal |
| issn | 2688-819X |
| language | English |
| last_indexed | 2024-04-13T19:14:01Z |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | SmartMat |
| spelling | doaj.art-b9dc5865bbf8427b938cf66893ff8f972022-12-22T02:33:45ZengWileySmartMat2688-819X2022-06-013226026810.1002/smm2.1075Ultra‐strong phosphorescence with 48% quantum yield from grinding treated thermal annealed carbon dots and boric acid compositeQijun Li0Zhenxiao Zhao1Shuai Meng2Yuchen Li3Yunyang Zhao4Bohan Zhang5Zikang Tang6Jing Tan7Songnan Qu8Institute for Energy Research, Institute of Micro‐nano Optoelectronics and Terahertz Technology, School of Mechanical Engineering Jiangsu University Zhenjiang ChinaInstitute for Energy Research, Institute of Micro‐nano Optoelectronics and Terahertz Technology, School of Mechanical Engineering Jiangsu University Zhenjiang ChinaInstitute for Energy Research, Institute of Micro‐nano Optoelectronics and Terahertz Technology, School of Mechanical Engineering Jiangsu University Zhenjiang ChinaInstitute for Energy Research, Institute of Micro‐nano Optoelectronics and Terahertz Technology, School of Mechanical Engineering Jiangsu University Zhenjiang ChinaJoint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering University of Macau Macau ChinaJoint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering University of Macau Macau ChinaJoint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering University of Macau Macau ChinaInstitute for Energy Research, Institute of Micro‐nano Optoelectronics and Terahertz Technology, School of Mechanical Engineering Jiangsu University Zhenjiang ChinaJoint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering University of Macau Macau ChinaAbstract Metal‐free room‐temperature phosphorescence (RTP) materials are of great significance for many applications; however, they usually exhibit low efficiency and weak intensity. This article reports a new strategy for the preparation of a high‐efficiency and strong RTP materials from crystalline thermal‐annealed carbon dots (CDs) and boric acid (BA) composite (g‐t‐CD@BA) through grinding‐induced amorphous to crystallization transition. Amorphous thermal‐annealed CDs and BA composite (t‐CD@BA) is prepared following a thermal melting and super‐cooling route, where the CDs are fully dispersed in molten BA liquid and uniformly frozen in an amorphous thermal annealed BA matrix after super‐cooling to room temperature. Upon grinding treatment, the fracture and fragmentation caused by grinding promote the transformation of the high‐energy amorphous state to the lower energy crystalline counterparts. As a result, the CDs are uniformly in situ embedded in the BA crystal matrix. This method affords maximum uniform embedding of the CDs in the BA crystals, decreases nonradiative decay, and promotes intersystem crossing by restraining the free vibration of the CDs, thus producing strong RTP materials with the highest reported phosphorescence quantum yield (48%). Remarkably, RTP from g‐t‐CD@BA powder is strong enough to illuminate items with a delay time exceeding 9 s.https://doi.org/10.1002/smm2.1075boric acidcarbon dotscrystalline stategrinding treatmentroom‐temperature phosphorescence |
| spellingShingle | Qijun Li Zhenxiao Zhao Shuai Meng Yuchen Li Yunyang Zhao Bohan Zhang Zikang Tang Jing Tan Songnan Qu Ultra‐strong phosphorescence with 48% quantum yield from grinding treated thermal annealed carbon dots and boric acid composite SmartMat boric acid carbon dots crystalline state grinding treatment room‐temperature phosphorescence |
| title | Ultra‐strong phosphorescence with 48% quantum yield from grinding treated thermal annealed carbon dots and boric acid composite |
| title_full | Ultra‐strong phosphorescence with 48% quantum yield from grinding treated thermal annealed carbon dots and boric acid composite |
| title_fullStr | Ultra‐strong phosphorescence with 48% quantum yield from grinding treated thermal annealed carbon dots and boric acid composite |
| title_full_unstemmed | Ultra‐strong phosphorescence with 48% quantum yield from grinding treated thermal annealed carbon dots and boric acid composite |
| title_short | Ultra‐strong phosphorescence with 48% quantum yield from grinding treated thermal annealed carbon dots and boric acid composite |
| title_sort | ultra strong phosphorescence with 48 quantum yield from grinding treated thermal annealed carbon dots and boric acid composite |
| topic | boric acid carbon dots crystalline state grinding treatment room‐temperature phosphorescence |
| url | https://doi.org/10.1002/smm2.1075 |
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