Ultrafast photophysics of multiexcitons in strongly confined semiconductor nanocrystals

Research output: Contribution to journalConference articlepeer-review


The ultrafast optical technique was used to study the multiexciton states in size- and shape-controlled CdSe and PbSe nanocrystals (NC). The effect of the zero-dimensional to one-dimensional transition on the efficiency of multiparticle Auger recombination using a series of quantum rods with different aspect ratios was also investigated. The transition from the three-to two-particle recombination process was observed as the nanocrystal aspect ratio was increased. The effect of quantum confinement on impact ionization using a series of PbSe NC of different sizes was also investigated. The results show that impact ionization process in NCs can be used to increase the power conversion efficiency of NC-based solar cells.

Original languageEnglish
Pages (from-to)447-448
Number of pages2
JournalConference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
Publication statusPublished - Dec 1 2004
Event2004 IEEE LEOS Annual Meeting Conference Proceedings, LEOS 2004 - Rio Grande, Puerto Rico
Duration: Nov 7 2004Nov 11 2004

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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