AVS 57th International Symposium & Exhibition
    Energy Frontiers Topical Conference Monday Sessions
       Session EN-MoA

Invited Paper EN-MoA8
PbSe and PbS Nanocrystal Solar Cells

Monday, October 18, 2010, 4:20 pm, Room Mesilla

Session: Excitonic and Third Generation Solar Cells
Presenter: T. Hanrath, Cornell University
Authors: J.J. Choi, Cornell University
J. Luria, Cornell University
B.-R. Hyun, Cornell University
A.C. Bartnik, Cornell University
L. Sun, Cornell University
Y.-F. Lim, Cornell University
J.A. Marohn, Cornell University
F.W. Wise, Cornell University
T. Hanrath, Cornell University
Correspondent: Click to Email
Rational progress towards nanocrystal based solar cells demands an improved understanding of electronic and optical interactions of proximate nanocrystals in functional assemblies. We combined transient photoluminescence spectroscopy and electric force microscopy to probe photogenerated exciton dissociation in PbS nanocrystal assemblies. We show that excitons dissociate via charge tunneling between neighboring nanocrystals. Implications in the context of nanocrystal photovoltaic devices will be discussed. We also present the design, fabrication and characterization of excitonic solar cells based on PbSe and PbS nanocrystal active layers. The best performing device shows a 1-sun power conversion efficiency of 4%.