Carrier multiplication (CM) was observed in CdTe quantum dots (QDs) capped with tetradecylphosphonic acid (TDPA) at h nu/E-g > 2.5 by picosecond single-photon timing spectroscopy, where h nu and E-g are the excitation and the band gap energies, and the CM efficiency increased rapidly with the increase of h nu/E-g. No CM was observed less than the threshold value of h nu/E-g approximate to 2.5, which is close to that of CdSe QDs. As compared to a previous report by Nair and Bawendi, our result suggests that CM is sensitive to the QD surface conditions.
机构:
Natl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USANatl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Beard, Matthew C.
;
Midgett, Aaron G.
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Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USANatl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Midgett, Aaron G.
;
Law, Matt
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Natl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USANatl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Law, Matt
;
Semonin, Octavi E.
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Univ Colorado, Dept Phys, Boulder, CO 80309 USANatl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Semonin, Octavi E.
;
Ellingson, Randy J.
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机构:Natl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Ellingson, Randy J.
;
Nozik, Arthur J.
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Natl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USANatl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
机构:
Natl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USANatl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Beard, Matthew C.
;
Midgett, Aaron G.
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机构:
Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USANatl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Midgett, Aaron G.
;
Law, Matt
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机构:
Natl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USANatl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Law, Matt
;
Semonin, Octavi E.
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机构:
Univ Colorado, Dept Phys, Boulder, CO 80309 USANatl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Semonin, Octavi E.
;
Ellingson, Randy J.
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机构:Natl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Ellingson, Randy J.
;
Nozik, Arthur J.
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机构:
Natl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA
Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USANatl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA