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Träfflista för sökning "WFRF:(Zhou Sicheng) "

Search: WFRF:(Zhou Sicheng)

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1.
  • Dong, Lin, et al. (author)
  • Photoluminescence from quasi-type-II spherical CdSe-CdS core-shell quantum dots
  • 2013
  • In: Applied Optics. - 1559-128X .- 2155-3165. ; 52:1, s. 105-109
  • Journal article (peer-reviewed)abstract
    • Spherical CdSe-CdS core-shell quantum dots (QDs) are found to be flexible in the transition between the type-I regime and the type-II regime with different core/shell dimensions. The quasi-type-II feature of the colloidal dots is confirmed with time-resolved photoluminescence (PL) measurements. Two recombination paths of the excitons with significantly different decay rates are observed and analyzed. The spherical CdSe-CdS core-shell QDs are numerically simulated to investigate the carrier separation. A relatively long radiative lifetime and high degree of spatial carrier separation provide good potential to achieve lasing under continuous-wave excitation. Amplified spontaneous emission at room temperature is detected from the QDs embedded in the polymer matrix. It is shown that a larger shell thickness results in a lower pumping threshold, while a smaller shell thickness leads to higher PL efficiency.
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2.
  • Zhou, Sicheng, et al. (author)
  • Radiative properties of carriers in CdSe-CdS core-shell heterostructured nanocrystals of various geometries
  • 2013
  • In: Journal of the European Optical Society-Rapid Publications. - : European Optical Society. - 1990-2573. ; 8, s. 13042-
  • Journal article (peer-reviewed)abstract
    • We report a model on core-shell heterostructured nanocrystals with CdSe as the core and CdS as the shell. The model is based on one-band Schrodinger equation. Three different geometries, nanodot, nanorod, and nanobone, are implemented. The carrier localization regimes with these structures are simulated, compared, and analyzed. Based on the electron and hole wave functions, the carrier overlap integral that has a great impact on stimulated emission is further investigated numerically by a novel approach. Furthermore, the relation between the nanocrystal size and electron-hole recombination energy is also examined.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Friberg, Ari T. (2)
Popov, Sergei (2)
Dong, Lin (2)
Zhou, Sicheng (2)
Muhammed, Mamoun (1)
Toprak, Muhammet S. (1)
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Hu, Jun (1)
Sugunan, Abhilash (1)
Li, Shanghua (1)
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University
Royal Institute of Technology (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2013 (2)

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