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나노의학 연구단
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Photoinduced Mn doping in cesium lead halide perovskite nanocrystals

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Title
Photoinduced Mn doping in cesium lead halide perovskite nanocrystals
Author(s)
Tian Qiao; David Parobek; Yitong Dong; Eunsang Ha; Dong Hee Son
Publication Date
2019-03
Journal
NANOSCALE, v.11, no.12, pp.5247 - 5253
Publisher
ROYAL SOC CHEMISTRY
Abstract
We report the photoinduced post-synthesis method of Mn doping in colloidal perovskite nanocrystals, which can produce Mn-doped CsPbX 3 (X = Cl, Br) nanocrystals with preserved size and anisotropic morphology. Photoinduced Mn doping occurs through cation exchange driven by the facile photoinduced halide exchange in dihalomethane (CH 2 X 2 , X = Cl, Br) solvent taking advantage of in situ photogeneration of halide ions from the solvent molecules. In the presence of a small amount of Mn acetate dissolved in solvent at sub-micromolar concentration, photoexcitation of the nanocrystals above the bandgap initiates the simultaneous anion and cation exchange. Under the condition of self-anion exchange, the resulting product is only the cation (Mn) doping in the nanocrystal host without changing halide composition, where the extent of doping can be controlled by excitation light intensity. The mild nature of the photoinduced doping also preserves the anisotropic morphology of the nanocrystals. The photoinduced Mn-doping method could be further expanded to other cations providing a versatile means of creating various cation-doped perovskite nanocrystals that are difficult to produce by other means. © The Royal Society of Chemistry
URI
https://pr.ibs.re.kr/handle/8788114/6233
ISSN
2040-3364
Appears in Collections:
Center for Nanomedicine (나노의학 연구단) > Journal Papers
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201903_Photoinduced Mn doping in cesium lead halide perovskite nanocrystals_Dong Hee Son.pdfDownload

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