Materials Research Bulletin, volume 140, pages 111298
Near-infrared two-photon absorption upconversion of PbS/CdS quantum dots prepared by cation exchange method
Publication type: Journal Article
Publication date: 2021-08-01
Journal:
Materials Research Bulletin
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor: 5.4
ISSN: 00255408
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Mechanics of Materials
Abstract
Schematic diagram about the energy band arrangement of the core/shell structures at different stages of the cation exchange reaction. • PbS/CdS QDs with the band alignment changeing from type-I to quasi-type II are prepared via the cation exchange method. • Nonlinear two-photon absorption upconversion luminescence is obtained in quantum dots excited by 1064 nm femtosecond laser. • The long fluorescence lifetime inherited from the PbS core endows PbS/CdS QD a decay lifetime of hundreds of nanoseconds. Taking advantage of multi-photon absorption, the semiconductor quantum dots show great potential in the field of bio-logical fluorescence imaging. In this paper, PbS/CdS core-shell quantum dots with the band alignment adjustable from type-I to quasi-type II are prepared through the cation exchange method. The core-shell quantum dots exhibit bright broad-band visible/near-infrared upconversion emission upon the excitation of 1064 nm pulse laser, and the core-shell QDs hold a decay lifetime of hundreds of nanoseconds. These characteristics enable the present PbS/CdS core-shell quantum dots to be a promising candidate for biomedical fluorescence imaging.
Top-30
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1 publication, 14.29%
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1 publication, 14.29%
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Citations by publishers
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American Chemical Society (ACS)
2 publications, 28.57%
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Wiley
2 publications, 28.57%
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Elsevier
1 publication, 14.29%
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Royal Society of Chemistry (RSC)
1 publication, 14.29%
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Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii
1 publication, 14.29%
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- We do not take into account publications without a DOI.
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Cheng L. et al. Near-infrared two-photon absorption upconversion of PbS/CdS quantum dots prepared by cation exchange method // Materials Research Bulletin. 2021. Vol. 140. p. 111298.
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Cheng L., Cheng Y., Xu J. F., Lin H., Wang Y. Near-infrared two-photon absorption upconversion of PbS/CdS quantum dots prepared by cation exchange method // Materials Research Bulletin. 2021. Vol. 140. p. 111298.
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TY - JOUR
DO - 10.1016/j.materresbull.2021.111298
UR - https://doi.org/10.1016/j.materresbull.2021.111298
TI - Near-infrared two-photon absorption upconversion of PbS/CdS quantum dots prepared by cation exchange method
T2 - Materials Research Bulletin
AU - Cheng, L
AU - Cheng, Yao
AU - Xu, Ju Feng
AU - Lin, Hang
AU - Wang, Yuansheng
PY - 2021
DA - 2021/08/01 00:00:00
PB - Elsevier
SP - 111298
VL - 140
SN - 0025-5408
ER -
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@article{2021_Cheng,
author = {L Cheng and Yao Cheng and Ju Feng Xu and Hang Lin and Yuansheng Wang},
title = {Near-infrared two-photon absorption upconversion of PbS/CdS quantum dots prepared by cation exchange method},
journal = {Materials Research Bulletin},
year = {2021},
volume = {140},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016/j.materresbull.2021.111298},
pages = {111298},
doi = {10.1016/j.materresbull.2021.111298}
}