Operando spectroscopic characterization of formamidinium lead iodide perovskite quantum dots for tracking electrochemical reactions

Identification and Dynamics of Microsecond Long-Lived Charge Carriers for CsPbBr3 Perovskite Quantum Dots, Featuring Ambient Long-Term Stability

“…In addition, in Figure S3, the interparticle distance (edge–edge distance) between PeQDs was determined to be 4.2 ± 1.5 nm from TEM results (Figure S2a), suggesting that each particle is well isolated. High-resolution XPS spectra depicted in Figure S4 with their deconvolution peaks provide insights into the oxidation states of the components in CsPbBr 3 @SiO x . − Considering that the LARP process in this study was conducted under ambient conditions, minor species, including Cs 2 O or its hydrate forms, as well as unreacted species such as CsBr and PbBr 2 , were observed. The major oxidation states of Cs + , Pb 2+ , and Br – align with the CsPbBr 3 perovskite structure as identified in our earlier studies .…”