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Issue 13, 2017
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Thermal degradation of luminescence in inorganic perovskite CsPbBr3 nanocrystals

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Abstract

The luminescence properties of inorganic perovskite CsPbBr3 nanocrystals (NCs) with emissions of 492 and 517 nm under thermal annealing treatment were studied by temperature-dependent photoluminescence (PL) spectroscopy. The CsPbBr3 NCs were annealed in vacuum at various temperatures. It was found that the NCs exhibited significant thermal degradation of PL at thermal annealing temperatures above 320 K. The transmission electron microscopy, X-ray diffraction and PL spectroscopy demonstrated that the size of NCs almost kept constant at thermal annealing temperatures below 360 K while it significantly enlarged at higher thermal temperatures above 380 K. The PL intensities, peak energies and linewidths of the annealed NCs, as a function of temperature, are discussed in detail. The PL degradation of the NCs was related to the formation of nonradiative recombination centers due to the loss of ligands and growth of NCs under thermal annealing.

Graphical abstract: Thermal degradation of luminescence in inorganic perovskite CsPbBr3 nanocrystals

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Publication details

The article was received on 26 Dec 2016, accepted on 06 Mar 2017 and first published on 16 Mar 2017


Article type: Paper
DOI: 10.1039/C6CP08824D
Citation: Phys. Chem. Chem. Phys., 2017,19, 8934-8940
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    Thermal degradation of luminescence in inorganic perovskite CsPbBr3 nanocrystals

    X. Yuan, X. Hou, J. Li, C. Qu, W. Zhang, J. Zhao and H. Li, Phys. Chem. Chem. Phys., 2017, 19, 8934
    DOI: 10.1039/C6CP08824D

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