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On the determination of absorption cross section of colloidal lead halide perovskite quantum dots

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Title
On the determination of absorption cross section of colloidal lead halide perovskite quantum dots
Author(s)
Joseph Puthenpurayil; Oscar Hsu-Cheng Cheng,; Tian Qiao; Daniel Rossi; Dong Hee Son
Publication Date
2019-10
Journal
JOURNAL OF CHEMICAL PHYSICS, v.151, no.15, pp.154706 -
Publisher
AMER INST PHYSICS
Abstract
© 2019 Author(s).The absorption cross section of lead halide perovskite nanocrystals is important for understanding their photophysical properties, especially those depending on the density of photoexcited charge carriers. Despite its importance, there are large discrepancies among the reported absorption cross section values determined employing different methods. Here, we measured the absorption cross section of CsPbBr3 quantum dots (QDs) of varying sizes using elemental analysis and transient absorption (TA) saturation methods and compared with the previously reported values determined from elemental analysis and transient photoluminescence (PL) saturation methods. A careful comparison indicates that the reliable absorption cross section of lead halide perovskite QDs is obtained from both elemental analysis and TA saturation methods, while many previously reported values determined from the PL saturation method underestimate the absorption cross section
URI
https://pr.ibs.re.kr/handle/8788114/6567
ISSN
0021-9606
Appears in Collections:
Center for Nanomedicine (나노의학 연구단) > Journal Papers
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