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- Title
Pressure-induced photoluminescence enhancement and ambient retention in confined carbon dots.
- 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
- Abstract
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.
- Publication
Nano Research, 2022, Vol 15, Issue 3, p2545
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-021-3736-x