The Degradation and Blinking of Single CsPbl(3) Perovskite Quantum Dots
Gangcheng Yuan, Cameron Ritchie, Maria Ritter, Sean Murphy, Daniel E Gomez, Paul Mulvaney
JOURNAL OF PHYSICAL CHEMISTRY C | AMER CHEMICAL SOC | Published : 2018
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 reco..View full abstract
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Awarded by ARC
We acknowledge support from the ARC through the following grants: DP130102134 and CE170100026. G.Y. thanks the University of Melbourne for MIFR and MIEA scholarships. D.E.G. thanks the ARC for funding through a Future Fellowship (FT140100514).