Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Aaron G. Midgett"'
Autor:
Joseph M. Luther, Jeffrey M. Pietryga, M. Mumtaz Qazilbash, Matthew C. Beard, Arthur J. Nozik, Victor I. Klimov, John T. Stewart, Lazaro A. Padilha, Aaron G. Midgett
Publikováno v:
Nano Letters. 12:622-628
Infrared band gap semiconductor nanocrystals are promising materials for exploring generation III photovoltaic concepts that rely on carrier multiplication or multiple exciton generation, the process in which a single high-energy photon generates mor
Autor:
Georgy I. Maikov, Arthur J. Nozik, Joseph M. Luther, Juleon M. Schins, Gal Grinbom, Aaron G. Midgett, Leo Polak, Matthew C. Beard, Mischa Bonn, Efrat Lifshitz, Roman Vaxenburg, Arjan J. Houtepen, Laurens D. A. Siebbeles, M. Tuan Trinh
Publikováno v:
Nano Letters
Multiple exciton generation (MEG) in PbSe quantum dots (QDs), PbSe(x)S(1-x) alloy QDs, PbSe/PbS core/shell QDs, and PbSe/PbSe(y)S(1-y) core/alloy-shell QDs was studied with time-resolved optical pump and probe spectroscopy. The optical absorption exh
Publikováno v:
The Journal of Physical Chemistry C. 114:17486-17500
Recent reports question the validity of pulsed fs-laser experiments for measuring the photon-to-exciton quantum yields (QYs) that result from multiple exciton generation (MEG). The repetitive nature of these experiments opens up an alternative relaxa
Autor:
Matthew C. Beard, Justin C. Johnson, Arthur J. Nozik, Aaron G. Midgett, Octavi E. Semonin, Joseph M. Luther
Publikováno v:
The Journal of Physical Chemistry Letters. 1:2445-2450
In this study, we have directly measured the photoluminescence quantum yield (ΦPL) of IR-26 at a range of concentrations and the ΦPL of PbS and PbSe QDs for a range of sizes. We find that the ΦPL of IR-26 has a weak concentration dependence due to
Autor:
Matthew C. Beard, Barbara K. Hughes, Arthur J. Nozik, Joseph M. Luther, Mark C. Hanna, Aaron G. Midgett
Publikováno v:
Nano Letters. 10:3019-3027
Multiple exciton generation (MEG) in quantum dots (QDs) and impact ionization (II) in bulk semiconductors are processes that describe producing more than one electron-hole pair per absorbed photon. We derive expressions for the proper way to compare
Autor:
Randy J. Ellingson, Octavi E. Semonin, Matt Law, Aaron G. Midgett, Matthew C. Beard, Arthur J. Nozik
Publikováno v:
Nano Letters. 9:836-845
We study multiple exciton generation (MEG) in two series of chemically treated PbSe nanocrystal (NC) films. We find that the average number of excitons produced per absorbed photon varies between 1.0 and 2.4 (+/-0.2) at a photon energy of approximate
Autor:
Joseph M. Luther, John T. Stewart, Aaron G. Midgett, Danielle K. Smith, Lazaro A. Padilha, Arthur J. Nozik, Victor I. Klimov, Matthew C. Beard
Publikováno v:
Nano letters. 13(7)
Using ultrafast transient absorption and time-resolved photoluminescence spectroscopies, we studied multiple exciton generation (MEG) in quantum dots (QDs) consisting of either PbSe, PbS, or a PbSxSe1-x alloy for various QD diameters with correspondi
Autor:
Matthew C. Beard, Octavi E. Semonin, Joseph M. Luther, Aaron G. Midgett, Justin C. Johnson, Arthur J. Nozik
Publikováno v:
2010 35th IEEE Photovoltaic Specialists Conference.
Nanostructures of semiconductor materials exhibit quantization effects when the electronic particles of these materials are confined by potential barriers to small regions of space. The confinement can be in one dimension (producing quantum films, al
Autor:
Aaron G Midgett, C. Parworth, Bert E. Holmes, George L. Heard, Traci Berry Holloway, D. W. Setser, Heather A. Ferguson
Publikováno v:
The journal of physical chemistry. A. 113(37)
The unimolecular reactions of 1-propanol, 3,3,3-propan-1-ol-d3, 3,3,3-trifluoropropan-1-ol, and 3-chloropropan-1-ol have been studied by the chemical activation technique. The recombination of CH3, CD3, CF3, and CH2Cl radicals with CH2CH2OH radicals
Autor:
M. Tuan Trinh, Leo Polak, Juleon M. Schins, Arjan J. Houtepen, Roman Vaxenburg, Georgy I. Maikov, Gal Grinbom, Aaron G. Midgett, Joseph M. Luther, Matthew C. Beard, Arthur J. Nozik, Mischa Bonn, Efrat Lifshitz, Laurens D. A. Siebbeles
Publikováno v:
Nano Letters; Apr2011, Vol. 11 Issue 4, p1623-1629, 7p