Research Topics
| Victor I KlimovSummaryAffiliation: Los Alamos National Laboratory Country: USA Publications
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Detail Information
Publications
Spectral and dynamical properties of multiexcitons in semiconductor nanocrystalsVictor I Klimov
Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
Annu Rev Phys Chem 58:635-73. 2007..This chapter also briefly reviews the implications of multiexciton effects for practical technologies, such as NC lasing and photovoltaics...- An amphiphilic approach to nanocrystal quantum dot-titania nanocompositesMelissa A Petruska
Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
J Am Chem Soc 126:714-5. 2004..This procedure is applicable to hydrophobically capped NQDs of a variety of shapes and compositions, making it a truly generalized route to nanocrystal-titania nanocomposites... 
'Giant' CdSe/CdS core/shell nanocrystal quantum dots as efficient electroluminescent materials: strong influence of shell thickness on light-emitting diode performanceBhola N Pal
Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nano Lett 12:331-6. 2012..The thickest-shell nanocrystals (16 monolayers of CdS) afforded an external quantum efficiency and luminance of 0.17% and 2000 Cd/m(2), respectively, with a remarkably low turn-on voltage of ~3.0 V...- Spectral dependence of nanocrystal photoionization probability: the role of hot-carrier transferLazaro A Padilha
Center for Advanced Solar Photophysics, C PCS, Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
ACS Nano 5:5045-55. 2011..The charge-separated states produced by photoionization are characterized by extremely long lifetimes (20 to 85 s) that become longer with increasing NQD size... - Spectroscopic signatures of photocharging due to hot-carrier transfer in solutions of semiconductor nanocrystals under low-intensity ultraviolet excitationJohn A McGuire
Center for Advanced Solar Photophysics, Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
ACS Nano 4:6087-97. 2010..The results of these studies have important implications for the understanding of photophysical properties of NCs, especially in the case of time-resolved measurements of carrier multiplication... - Copper-doped inverted core/shell nanocrystals with "permanent" optically active holesRanjani Viswanatha
Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
Nano Lett 11:4753-8. 2011..7 eV). These properties make them very attractive for applications in light-emission and lasing technologies and especially for the realization of novel device concepts such as "zero-threshold" optical gain... 
Lifetime blinking in nonblinking nanocrystal quantum dotsChristophe Galland
Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nat Commun 3:908. 2012..The Auger process involving excitation of a hole (positive trion pathway) remains efficient and is responsible for charging with excess electrons, which occurs via Auger-assisted ionization of biexcitons accompanied by ejection of holes...- Breakdown of volume scaling in Auger recombination in CdSe/CdS heteronanocrystals: the role of the core-shell interfaceFlorencio García-Santamaría
Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nano Lett 11:687-93. 2011..These data highlight the importance of NC interfacial structure in the AR process and provide general guidelines for the development of new nanostructures with suppressed AR for future lasing applications... - Highly effective surface passivation of PbSe quantum dots through reaction with molecular chlorineWan Ki Bae
Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
J Am Chem Soc 134:20160-8. 2012.... - Nanocrystal-based light-emitting diodes utilizing high-efficiency nonradiative energy transfer for color conversionMarc Achermann
Los Alamos National Laboratory, New Mexico 87545, USA
Nano Lett 6:1396-400. 2006..Furthermore, these hybrid devices can also provide improved efficiencies, compared not only to phosphor-based structures but also to stand-alone LEDs... - Role of solvent-oxygen ion pairs in photooxidation of CdSe nanocrystal quantum dotsVirginia W Manner
Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
ACS Nano 6:2371-7. 2012.... - Comparison of carrier multiplication yields in PbS and PbSe nanocrystals: the role of competing energy-loss processesJohn T Stewart
Center for Advanced Solar Photophysics, C PCS, Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nano Lett 12:622-8. 2012..Indeed, our estimations for phonon emission mediated by the polar Fröhlich-type interaction indicate that the corresponding energy-loss rate is approximately twice as large in PbS than in PbSe... - Carrier multiplication in InAs nanocrystal quantum dots with an onset defined by the energy conservation limitRichard D Schaller
Chemistry Division, C PCS, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nano Lett 7:3469-76. 2007..We report experimental studies of exciton dynamics (Auger recombination, intraband relaxation, radiative recombination, multiexciton generation, and biexciton shift) in InAs NQDs and show that they exhibit a CM threshold near 2Eg... - Hybrid photovoltaics based on semiconductor nanocrystals and amorphous siliconBaoquan Sun
Chemistry Division, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nano Lett 9:1235-41. 2009..9%. This work demonstrates the feasibility of hybrid PV devices that combine advantages of mature silicon fabrication technologies with the unique electronic properties of semiconductor NCs... - Multiexciton dynamics in infrared-emitting colloidal nanostructures probed by a superconducting nanowire single-photon detectorRichard L Sandberg
Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
ACS Nano 6:9532-40. 2012..These findings suggest that shape control is a promising approach for enhancing the CM process. Further, our work demonstrates the effectiveness of the SNSPD technique for the rapid screening of CM performance in infrared nanomaterials... - Dynamic hole blockade yields two-color quantum and classical light from dot-in-bulk nanocrystalsChristophe Galland
Chemistry Division and Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nano Lett 13:321-8. 2013.... - Colloidal synthesis of infrared-emitting germanium nanocrystalsDoh C Lee
Chemistry Division, C PCS, MS J567, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
J Am Chem Soc 131:3436-7. 2009..Size analysis of the samples by transmission electron microscopy revealed that the size dependence of the emission is consistent with the effects of quantum confinement... - Generalized synthesis of hybrid metal-semiconductor nanostructures tunable from the visible to the infraredBishnu P Khanal
Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
ACS Nano 6:3832-40. 2012.... - Two types of luminescence blinking revealed by spectroelectrochemistry of single quantum dotsChristophe Galland
Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nature 479:203-7. 2011..When unoccupied, these sites intercept 'hot' electrons before they relax into emitting core states. Both blinking mechanisms can be electrochemically controlled and completely suppressed by application of an appropriate potential... - Tuning radiative recombination in Cu-doped nanocrystals via electrochemical control of surface trappingSergio Brovelli
Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nano Lett 12:4372-9. 2012.... - Spin-polarized mn^{2+} emission from mn-doped colloidal nanocrystalsRanjani Viswanatha
Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Phys Rev Lett 107:067402. 2011..These data highlight the influence of strong quantum confinement on both the excitation and the emission mechanisms of magnetic ions in DMS nanomaterials... - Effect of air exposure on surface properties, electronic structure, and carrier relaxation in PbSe nanocrystalsMilan Sykora
Center for Advanced Solar Photophysics, Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
ACS Nano 4:2021-34. 2010..We also show that the effects of air exposure are partially suppressed in PbSe/CdSe core/shell structures... - Efficient synthesis of highly luminescent copper indium sulfide-based core/shell nanocrystals with surprisingly long-lived emissionLiang Li
Center for Advanced Solar Photophysics, C PCS, Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
J Am Chem Soc 133:1176-9. 2011.... - Effect of quantum and dielectric confinement on the exciton-exciton interaction energy in type II core/shell semiconductor nanocrystalsAndrei Piryatinski
Center for Nonlinear Studies CNLS, Theoretical Division, and Center for Integrated Nanotechnologies CINT, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nano Lett 7:108-15. 2007..Potential applications of strongly interacting biexciton states include such areas as lasing, nonlinear optics, and quantum information... - A reduction pathway in the synthesis of PbSe nanocrystal quantum dotsJin Joo
Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
J Am Chem Soc 131:10620-8. 2009..Finally, we use numerical simulations to support the conjecture that the increased yield is likely a result of faster monomer formation, consistent with the activation of an additional reaction pathway by the reducing species... - Role of mid-gap states in charge transport and photoconductivity in semiconductor nanocrystal filmsPrashant Nagpal
Center for Advanced Solar Photophysics, C PCS, Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nat Commun 2:486. 2011..In this case, the mid-gap band still has an important role as its occupancy (tuned by the gate voltage) controls the dynamics of band-edge charges... - Multicolor light-emitting diodes based on semiconductor nanocrystals encapsulated in GaN charge injection layersAlexander H Mueller
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Nano Lett 5:1039-44. 2005..We demonstrate electroluminescence (injection efficiencies of at least 1%) in both single- and two-color regimes using structures comprising either a single monolayer or a bilayer of nanocrystals... - Universal size-dependent trend in auger recombination in direct-gap and indirect-gap semiconductor nanocrystalsIstvan Robel
Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Phys Rev Lett 102:177404. 2009....