5 years ago

Carbon dots/polyvinylpyrrolidone hybrid nanofibers with efficient solid-state photoluminescence constructed by electrospinning technique.

Shuang Zhang, Haining Cui, Xue Bai, Hongwei Song, Jinyang Zhu, Biao Dong, Tianxiang Zhang, Wei Liu, Yue Zhai, Lin Xu, Gencai Pan
Carbon dots (CDs) are the promising candidates for the application in the optoelectronic and biological areas due to their excellent photo-stability, unique photoluminescence, good biocompatibility, low toxicity and chemical inertness. However, the self-quenching of photoluminescence as they are dried into the solid-state dramatically limits their further applications. Therefore, realizing the efficient photoluminescence and large-scale production of CDs in the solid state is an urgent challenge. Herein, the solid-state hybrid nanofibers based on CDs and polyvinylpyrrolidone (PVP) are constructed through electrospinning process. The resulting solid-state hybrid PVP/CD nanofibers present much enhanced photoluminescence performance compared to the corresponding pristine colloidal CDs due to the decreasing of non-radiative recombination of electron-holes. Owing to the suppressed self-quenching of CDs, the photoluminescence quantum yield is considerably improved from 42.9 % of pristine CDs to 83.5% of nanofibers under the excitation wavelength of 360 nm. It has great application potential in optical or optoelectronic devices.

Publisher URL: http://doi.org/10.1088/1361-6528/aa99be

DOI: 10.1088/1361-6528/aa99be

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