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Optical properties of PbS/CdS core/shell quantum dots

(2013) JOURNAL OF PHYSICAL CHEMISTRY C. 117(39). p.20171-20177
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Center for nano- and biophotonics (NB-Photonics)
Abstract
We determine the optical properties of PbS/CdS core/shell QDs, addressing the energy and the oscillator strength of the first exciton transition and the intrinsic absorption coefficient at short wavelengths. It follows that the intrinsic absorption coefficient at wavelengths of 350 and 400 nm agrees with theoretical numbers predicted using the Maxwell-Garnett model. Moreover, close correspondence is demonstrated between the energy and the oscillator strength of the first exciton transition of PbS/CdS core/shell and PbS QDs with a similar core size. This provides a straightforward, way to estimate the PbS core diameter in PbS/CdS core/shell quantum dots by means of the PbS sizing curve, and it indicates that PbS/CdS QDs exhibit a type 1 band alignment.
Keywords
SEMICONDUCTOR NANOCRYSTALS, LIGHT-EMITTING-DIODES, PBSE/CDSE CORE/SHELL, CATION-EXCHANGE, EMISSION, SHELL, PHOTOLUMINESCENCE, CDSE, PBSE, HETEROSTRUCTURES

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Citation

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Chicago
Justo Zarraquiños, Yolanda, Pieter Geiregat, Karen Van Hoecke, Frank Vanhaecke, Celso De Mello Donega, and Zeger Hens. 2013. “Optical Properties of PbS/CdS Core/shell Quantum Dots.” Journal of Physical Chemistry C 117 (39): 20171–20177.
APA
Justo Zarraquiños, Y., Geiregat, P., Van Hoecke, K., Vanhaecke, F., Donega, C. D. M., & Hens, Z. (2013). Optical properties of PbS/CdS core/shell quantum dots. JOURNAL OF PHYSICAL CHEMISTRY C, 117(39), 20171–20177.
Vancouver
1.
Justo Zarraquiños Y, Geiregat P, Van Hoecke K, Vanhaecke F, Donega CDM, Hens Z. Optical properties of PbS/CdS core/shell quantum dots. JOURNAL OF PHYSICAL CHEMISTRY C. 2013;117(39):20171–7.
MLA
Justo Zarraquiños, Yolanda, Pieter Geiregat, Karen Van Hoecke, et al. “Optical Properties of PbS/CdS Core/shell Quantum Dots.” JOURNAL OF PHYSICAL CHEMISTRY C 117.39 (2013): 20171–20177. Print.
@article{4225574,
  abstract     = {We determine the optical properties of PbS/CdS core/shell QDs, addressing the energy and the oscillator strength of the first exciton transition and the intrinsic absorption coefficient at short wavelengths. It follows that the intrinsic absorption coefficient at wavelengths of 350 and 400 nm agrees with theoretical numbers predicted using the Maxwell-Garnett model. Moreover, close correspondence is demonstrated between the energy and the oscillator strength of the first exciton transition of PbS/CdS core/shell and PbS QDs with a similar core size. This provides a straightforward, way to estimate the PbS core diameter in PbS/CdS core/shell quantum dots by means of the PbS sizing curve, and it indicates that PbS/CdS QDs exhibit a type 1 band alignment.},
  author       = {Justo Zarraqui{\~n}os, Yolanda and Geiregat, Pieter and Van Hoecke, Karen and Vanhaecke, Frank and Donega, Celso De Mello and Hens, Zeger},
  issn         = {1932-7447},
  journal      = {JOURNAL OF PHYSICAL CHEMISTRY C},
  keyword      = {SEMICONDUCTOR NANOCRYSTALS,LIGHT-EMITTING-DIODES,PBSE/CDSE CORE/SHELL,CATION-EXCHANGE,EMISSION,SHELL,PHOTOLUMINESCENCE,CDSE,PBSE,HETEROSTRUCTURES},
  language     = {eng},
  number       = {39},
  pages        = {20171--20177},
  title        = {Optical properties of PbS/CdS core/shell quantum dots},
  url          = {http://dx.doi.org/10.1021/jp406774p},
  volume       = {117},
  year         = {2013},
}

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