The Degradation and Blinking of Single CsPbI3 Perovskite Quantum Dots

Yuan, G, Cameron Ritchie, C, Ritter, M, Murphy, S, Gomez, D and Mulvaney, P 2018, 'The Degradation and Blinking of Single CsPbI3 Perovskite Quantum Dots', Journal of Physical Chemistry C, vol. 122, no. 25, pp. 13407-13415.

Document type: Journal Article
Collection: Journal Articles

Title The Degradation and Blinking of Single CsPbI3 Perovskite Quantum Dots
Author(s) Yuan, G
Cameron Ritchie, C
Ritter, M
Murphy, S
Gomez, D
Mulvaney, P
Year 2018
Journal name Journal of Physical Chemistry C
Volume number 122
Issue number 25
Start page 13407
End page 13415
Total pages 9
Publisher American Chemical Society
Abstract We demonstrate using single molecule spectroscopy that inorganic CsPbI3 perovskite quantum dots (PQDs) undergo an irreversible, photoaccelerated reaction with water that results in a blue-shift of the photoluminescence (PL) and ultimately to complete quenching of the emission. We find that decomposition does not take place in the presence of oxygen alone but that it requires light and water. We also analyze the blinking for some stable PQDs and find a continuous distribution of emission states with a linear correlation between intensity and lifetime. We postulate that, in addition to charging and discharging processes, blinking arises from the activation and deactivation of nonradiative recombination centers in the PQDs.
Subject Nanomaterials
DOI - identifier 10.1021/acs.jpcc.7b11168
Copyright notice © 2017 American Chemical Society.
ISSN 1932-7447
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