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An experimental study on the blinking suppression mechanism of organic-inorganic formamidinium lead halide perovskite quantum dots on N-Type semiconductors

Title
An experimental study on the blinking suppression mechanism of organic-inorganic formamidinium lead halide perovskite quantum dots on N-Type semiconductors
Author
강영종
Keywords
SINGLE-PHOTON EMISSION; AUGER RECOMBINATION; CHARGED EXCITONS; NANOCRYSTALS; PHOTOLUMINESCENCE; BIEXCITONS; DYNAMICS
Issue Date
2020-03
Publisher
AMER INST PHYSICS
Citation
APL MATERIALS, v. 8, no. 3, article no. 031102
Abstract
Lead halide perovskite has emerged as a potential material for a wide range of applications, including solar cells, light-emitting diode displays, lasing, and single photon emitters. To optimize their utilization in optoelectronic devices, the fundamental photophysical properties, especially their charge carrier transition and blinking behaviors, must be elucidated. In this study, we investigate the blinking behaviors of single formamidinium bromide perovskite quantum dots (FAPbBr(3) PQDs) on the n-type TiO2 substrate. It is suggested that the electrons from TiO2 fill the trap states of FAPbBr(3) PQD during Fermi-level equilibrium, which can reduce the possibility of capturing the hot electrons from PQD into the trap states. In addition, charge separation and charge recombination processes between PQD and TiO2 are expected to shorten the duration of the OFF state, thus stabilizing the fluorescence of PQDs.
URI
https://aip.scitation.org/doi/10.1063/1.5140238https://repository.hanyang.ac.kr/handle/20.500.11754/163156
ISSN
2166-532X
DOI
10.1063/1.5140238
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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