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Energy transfer assisted solvent effects on CsPbBr3 quantum dots

Abstract

In this work, the solvent effects of chemically synthesized CsPbBr3 quantum dots (QDs) were performed and investigated by dissolving the QDs into the solvents of different polarities. The QDs presented green fluorescence in non-polar solvents like 1-octadecene, hexane and ether, but exhibited blue fluorescent color in the solvents of higher polarities (ethanol or acetone). The photoluminescence (PL), Fourier transform infrared (FTIR), transmission electron microscope (TEM) and time-resolved PL characterizations revealed the difference of QDs in two types of solvents. The hydrogen bonding system of -NH2 and polar solvents was responsible for the different fluorescent color. Also, the energy transfer between the QDs and the hydrogen bonding system was observed and confirmed by the ultrafast femtosecond transient absorption spectroscopy. We expect that the solvent effects of CsPbBr3 QDs have potential applications in fluorescence probe and photoelectrical devices.

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Publication details

The article was received on 26 Jul 2017, accepted on 28 Sep 2017 and first published on 29 Sep 2017


Article type: Paper
DOI: 10.1039/C7TC03351F
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Energy transfer assisted solvent effects on CsPbBr3 quantum dots

    J. Mei, F. Wang, Y. Wang, C. Tian, H. liu and D. Zhao, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03351F

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