Pressure-induced photoluminescence enhancement and ambient retention in confined carbon dots

Piezochromic luminescent materials have shown great potential in advanced optoelectronic applications. However, most of luminescent materials usually undergo emission quenching under external stimuli. Herein, we demonstrate for the first time that the photoluminescence of carbon dots (CDs) confined...

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Published inNano research Vol. 15; no. 3; pp. 2545 - 2551
Main Authors Lou, Qing, Yang, Xigui, Liu, Kaikai, Ding, Zhongzheng, Qin, Jinxu, Li, Yizhe, Lv, Chaofan, Shang, Yuan, Zhang, Yuewen, Zhang, Zhuangfei, Zang, Jinhao, Dong, Lin, Shan, Chong-Xin
Format Journal Article
LanguageEnglish
Published Beijing Tsinghua University Press 01.03.2022
Subjects
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Carbon
Carbon dots
Caustic soda
Chemistry and Materials Science
Condensed Matter Physics
Emission analysis
Emissions
External stimuli
Fluorescence
High pressure
Luminescence
Materials Science
Nanotechnology
Optical properties
Optoelectronics
Photoluminescence
Photons
Pressure
Research Article
Sodium hydroxide
carbon nanodots
piezochromic fluorescence
emission enhancement
confinement effect
high pressure
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Summary:Piezochromic luminescent materials have shown great potential in advanced optoelectronic applications. However, most of luminescent materials usually undergo emission quenching under external stimuli. Herein, we demonstrate for the first time that the photoluminescence of carbon dots (CDs) confined within sodium hydroxide can be enhanced when high pressure is applied. They exhibit a 1.6-fold fluorescence enhancement compared with pristine CDs. Importantly, the enhanced fluorescence intensity can be retained after the release of pressure to ambient conditions. A combination of experimental analysis and theoretical simulations indicates that such an enhanced emission is mainly attributed to the strong confinement resulting from the sodium hydroxide matrix, which can separate the CDs spatially and restrict the nonradiative pathway. These results provide a rational strategy for manipulating the optical properties of CDs with enhanced and retainable photoluminescence (PL) performance, thus opening up a venue for designing luminescent CDs-based materials.
Bibliography:ObjectType-Article-1
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ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-021-3736-x