• About
  • Policies
  • What is open access
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Science
      • Department of Physics
      • View Item
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Science
      • Department of Physics
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Auger recombination and carrier multiplication in embedded silicon and germanium nanocrystals

      Thumbnail
      View / Download
      627.0 Kb
      Author(s)
      Sevik, C.
      Bulutay, C.
      Date
      2008
      Source Title
      Physical Review B - Condensed Matter and Materials Physics
      Print ISSN
      1098-0121
      Publisher
      The American Physical Society
      Volume
      77
      Issue
      12
      Language
      English
      Type
      Article
      Item Usage Stats
      124
      views
      129
      downloads
      Abstract
      For Si and Ge nanocrystals (NCs) embedded in wide band-gap matrices, the Auger recombination and carrier multiplication (CM) lifetimes are computed exactly in a three-dimensional real space grid using empirical pseudopotential wave functions. Our results in support of recent experimental data offer other predictions. We extract simple Auger constants valid for NCs. We show that both Si and Ge NCs can benefit from photovoltaic efficiency improvement via CM due to the fact that under an optical excitation exceeding twice the band-gap energy, the electrons gain lion's share from the total excess energy and can cause a CM. We predict that CM becomes especially efficient for hot electrons with an excess energy of about 1 eV above the CM threshold.
      Permalink
      http://hdl.handle.net/11693/23169
      Published Version (Please cite this version)
      http://dx.doi.org/10.1103/PhysRevB.77.125414
      Collections
      • Department of Physics 2397
      Show full item record

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartments

      My Account

      LoginRegister

      Statistics

      View Usage StatisticsView Google Analytics Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 1771
      © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy