Online citations, reference lists, and bibliographies.
← Back to Search

The Effects Of Inorganic Surface Treatments On Photogenerated Carrier Mobility And Lifetime In PbSe Quantum Dot Thin Films

E. D. Goodwin, D. B. Straus, E. A. Gaulding, C. Murray, C. R. Kagan
Published 2016 · Chemistry

Save to my Library
Download PDF
Analyze on Scholarcy
Share
Abstract We used flash-photolysis, time-resolved microwave conductivity (TRMC) to probe the carrier mobility and lifetime in PbSe quantum dot (QD) thin films treated with solutions of the metal salts of Na2Se and PbCl2. The metal salt treatments tuned the Pb:Se stoichiometry and swept the Fermi energy throughout the QD thin film bandgap. A stoichiometric imbalance favoring excess Se heavily p-doped the QD thin film, shifted the Fermi energy toward the valence band, and yielded the highest TRMC mobility and lifetime. Introducing Pb first compensated the p-doping and shifted the Fermi level through mid-gap, decreasing the TRMC mobility. Further Pb addition created an excess of Pb, n-doped the QD thin film, moved the Fermi level to near the conduction band, and again increased the TRMC mobility. The increase in TRMC mobility as the Fermi energy was shifted toward the band edges by non-stoichiometry is consistent with the QD thin film density of states.
This paper references
10.1021/ja206303g
Thiocyanate-capped nanocrystal colloids: vibrational reporter of surface chemistry and solution-based route to enhanced coupling in nanocrystal solids.
Aaron T Fafarman (2011)
10.1021/ja309783v
Highly effective surface passivation of PbSe quantum dots through reaction with molecular chlorine.
W. K. Bae (2012)
10.1103/PHYSREV.128.2093
Wave-Number-Dependent Dielectric Function of Semiconductors
D. Penn (1962)
10.1021/nn403132x
Solution-based stoichiometric control over charge transport in nanocrystalline CdSe devices.
D. Kim (2013)
10.1021/nn2039164
Enhanced mobility-lifetime products in PbS colloidal quantum dot photovoltaics.
K. S. Jeong (2012)
10.1139/V77-309
The study of primary and secondary charge carriers in nanosecond pulse irradiated liquid dielectrics using a resonant microwave cavity
J. Warman (1977)
10.1021/CM503529J
Controlling the Trap State Landscape of Colloidal CdSe Nanocrystals with Cadmium Halide Ligands
Matthew J. Greaney (2015)
10.1021/nl301104z
Bandlike transport in strongly coupled and doped quantum dot solids: a route to high-performance thin-film electronics.
Ji-hyuk Choi (2012)
10.1002/adma.201001491
Infrared colloidal quantum dots for photovoltaics: fundamentals and recent progress.
J. Tang (2011)
10.1021/nl401298s
Confined-but-connected quantum solids via controlled ligand displacement.
W. Baumgardner (2013)
10.1021/ja301285x
Effect of metal ions on photoluminescence, charge transport, magnetic and catalytic properties of all-inorganic colloidal nanocrystals and nanocrystal solids.
Angshuman Nag (2012)
10.1038/nature01217
Electroluminescence from single monolayers of nanocrystals in molecular organic devices
S. Coe (2002)
10.1021/nl8009704
Enhanced thermopower in PbSe nanocrystal quantum dot superlattices.
Robert Y. Wang (2008)
10.1038/370354A0
Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer
V. Colvin (1994)
10.1063/1.2357421
Size-dependent energy band gap and dielectric constant within the generalized Penn model applied to a semiconductor nanocrystallite
A. Sharma (2006)
10.1021/nl202915p
Free charges produced by carrier multiplication in strongly coupled PbSe quantum dot films.
Michiel Aerts (2011)
10.1016/0009-2614(73)87012-5
The detection of electrons in pulse irradiated liquid hydrocarbons by microwave absorption
J. Warman (1973)
10.1021/nn402844m
Suppressed carrier scattering in CdS-encapsulated PbS nanocrystal films.
P. Moroz (2013)
10.1002/adma.201202825
N-type colloidal-quantum-dot solids for photovoltaics.
D. Zhitomirsky (2012)
10.1063/1.2008978
Development of a microwave transmission setup for time-resolved measurements of the transient complex conductivity in bulk samples
J. M. Schins (2005)
10.1021/jz4007492
Activating Carrier Multiplication in PbSe Quantum Dot Solids by Infilling with Atomic Layer Deposition.
Sybren ten Cate (2013)
10.1021/NL0502672
Highly efficient multiple exciton generation in colloidal PbSe and PbS quantum dots.
R. Ellingson (2005)
10.1021/JP9109546
Highly Photoconductive CdSe Quantum-Dot Films: Influence of Capping Molecules and Film Preparation Procedure
E. Talgorn (2010)
10.1021/nn506724h
Lifetime, mobility, and diffusion of photoexcited carriers in ligand-exchanged lead selenide nanocrystal films measured by time-resolved terahertz spectroscopy.
Glenn W. Guglietta (2015)
10.1021/JA062626G
On the mechanism of lead chalcogenide nanocrystal formation.
J. S. Steckel (2006)
10.1021/nn4021983
Role of bond adaptability in the passivation of colloidal quantum dot solids.
S. Thon (2013)
10.1103/PhysRevLett.92.186601
High efficiency carrier multiplication in PbSe nanocrystals: implications for solar energy conversion.
R. Schaller (2004)
10.1002/adma.201101065
Depleted bulk heterojunction colloidal quantum dot photovoltaics.
D. A. Barkhouse (2011)
10.1063/1.2136227
Photodetectors based on treated CdSe quantum-dot films
D. Oertel (2005)
10.1039/FT9949003323
Time-resolved microwave conductivity. Part 2.—Quantum-sized TiO2 and the effect of adsorbates and light intensity on charge-carrier dynamics
S. Martin (1994)
10.1038/nnano.2011.46
Band-like transport, high electron mobility and high photoconductivity in all-inorganic nanocrystal arrays.
J. Lee (2011)
10.1103/PHYSREVB.15.5712
Theory of optical and microwave properties of microscopically inhomogeneous materials
I. Webman (1977)
10.1126/SCIENCE.1117908
Air-Stable All-Inorganic Nanocrystal Solar Cells Processed from Solution
Ilan Gur (2005)
10.1021/ja308861d
Short-chain alcohols strip X-type ligands and quench the luminescence of PbSe and CdSe quantum dots, acetonitrile does not.
A. Hassinen (2012)
10.1103/PHYSREVB.82.155201
Charge transport in mixed CdSe and CdTe colloidal nanocrystal films
S. Geyer (2010)
10.1126/science.1170524
Colloidal Nanocrystals with Molecular Metal Chalcogenide Surface Ligands
M. Kovalenko (2009)
10.1146/ANNUREV.MATSCI.30.1.545
Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies
C. Murray (2000)
10.1021/nl404818z
Designing high-performance PbS and PbSe nanocrystal electronic devices through stepwise, post-synthesis, colloidal atomic layer deposition.
S. Oh (2014)
10.1021/nn403752d
In situ repair of high-performance, flexible nanocrystal electronics for large-area fabrication and operation in air.
Ji-hyuk Choi (2013)
10.1038/nnano.2012.127
Hybrid passivated colloidal quantum dot solids.
A. Ip (2012)
10.1126/science.1252642
Long-range orientation and atomic attachment of nanocrystals in 2D honeycomb superlattices
M. Boneschanscher (2014)
10.1038/NMAT902
Controlled growth of tetrapod-branched inorganic nanocrystals
L. Manna (2003)
10.1126/SCIENCE.1116703
PbSe Nanocrystal Solids for n- and p-Channel Thin Film Field-Effect Transistors
D. Talapin (2005)
10.1038/ncomms3360
High charge-carrier mobility enables exploitation of carrier multiplication in quantum-dot films
C. Sandeep (2013)
10.1021/CM034729T
Formation and stability of size-, shape-, and structure-controlled CdTe nanocrystals: Ligand effects on monomers and nanocrystals
W. Yu (2003)
10.1038/ncomms2218
Flexible and low-voltage integrated circuits constructed from high-performance nanocrystal transistors.
D. Kim (2012)
10.1021/J100066A034
X-ray Photoelectron Spectroscopy of CdSe Nanocrystals with Applications to Studies of the Nanocrystal Surface
J. B. Katari (1994)
10.1021/JP406706U
Revealing the Dynamics of Charge Carriers in Polymer:Fullerene Blends Using Photoinduced Time-Resolved Microwave Conductivity
T. Savenije (2013)
10.1021/nl302436r
Quantum junction solar cells.
J. Tang (2012)
10.1002/CHIN.200443230
Preparation and Characterization of Monodisperse PbSe Semiconductor Nanocrystals in a Noncoordinating Solvent.
W. Yu (2004)
10.1021/nn3057356
Stoichiometric control of lead chalcogenide nanocrystal solids to enhance their electronic and optoelectronic device performance.
S. Oh (2013)
10.1021/JP5076912
Effects of Post-Synthesis Processing on CdSe Nanocrystals and Their Solids: Correlation between Surface Chemistry and Optoelectronic Properties
E. D. Goodwin (2014)
10.1021/nl802476m
Schottky solar cells based on colloidal nanocrystal films.
J. Luther (2008)
10.1021/ja4086758
Ligand exchange and the stoichiometry of metal chalcogenide nanocrystals: spectroscopic observation of facile metal-carboxylate displacement and binding.
N. C. Anderson (2013)
10.1021/JA00072A025
Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites
C. Murray (1993)
10.1016/j.jcis.2008.12.063
Spectroscopic evaluation of surface functionalization efficiency in the preparation of mercaptopropyltrimethoxysilane self-assembled monolayers on glass.
P. Pallavicini (2009)
10.1021/nl202892p
Surfactant ligand removal and rational fabrication of inorganically connected quantum dots.
H. Zhang (2011)
10.1021/nl502491d
Engineering charge injection and charge transport for high performance PbSe nanocrystal thin film devices and circuits.
S. Oh (2014)
10.1038/nmat3118
Colloidal-quantum-dot photovoltaics using atomic-ligand passivation.
J. Tang (2011)
10.1021/nn3029716
Photoconductivity of PbSe quantum-dot solids: dependence on ligand anchor group and length.
Yunan Gao (2012)
10.1038/nature04855
Ultrasensitive solution-cast quantum dot photodetectors
G. Konstantatos (2006)
10.1016/0146-5724(77)90044-9
The study of the transient conductivity of pulse irradiated dielectric liquids on a nanosecond timescale using microwaves
P. Infelta (1977)
10.1063/1.337612
The study of charge carrier kinetics in semiconductors by microwave conductivity measurements
M. Kunst (1986)
10.1021/nn100335g
Depleted-heterojunction colloidal quantum dot solar cells.
A. Pattantyus-Abraham (2010)
10.1038/NMAT1299
Solution-processed PbS quantum dot infrared photodetectors and photovoltaics
S. A. McDonald (2005)
10.1021/nl304753n
PbSe quantum dot field-effect transistors with air-stable electron mobilities above 7 cm2 V(-1) s(-1).
Y. Liu (2013)
10.1038/nnano.2011.159
Unity quantum yield of photogenerated charges and band-like transport in quantum-dot solids.
E. Talgorn (2011)



This paper is referenced by
Electronic and structural investigation of nanocrystal thin films tuned via surface chemistry
E. Ashley Gaulding (2015)
10.1063/1.4978444
Increased efficiency in pn-junction PbS QD solar cells via NaHS treatment of the p-type layer
M. Speirs (2017)
Investigating the Effect of Nanoscale Changes on the Chemistry and Energetics of Nanocrystals with a Novel Photoemission Spectroscopy Methodology
M. W. Liao (2017)
Exceeding Conventional Photovoltaic Efficiency Limits Using Colloidal Quantum Dots
G. Pach (2017)
10.1039/c8cs00629f
Flexible colloidal nanocrystal electronics.
C. R. Kagan (2019)
10.1021/acs.jpclett.6b01308
Limits of Carrier Diffusion in n-Type and p-Type CH3NH3PbI3 Perovskite Single Crystals.
Octavi E. Semonin (2016)
10.1021/acs.jpclett.5b02251
Increased carrier mobility and lifetime in CdSe quantum dot thin films through surface trap passivation and doping.
D. B. Straus (2015)
10.1021/ACS.CHEMMATER.6B03493
Spectroelectrochemical Measurement of Surface Electrostatic Contributions to Colloidal CdSe Nanocrystal Redox Potentials
Gerard M. Carroll (2016)
10.1021/acsnano.6b03175
Advanced Architecture for Colloidal PbS Quantum Dot Solar Cells Exploiting a CdSe Quantum Dot Buffer Layer.
T. Zhao (2016)
10.1016/J.VACUUM.2018.12.018
The influence of scattering layer thin film on photoelectric properties of Bi2S3/CdS/TiO2 electrode
P. Lv (2019)
10.1039/C8TA00385H
Surface stoichiometry manipulation enhances solar hydrogen evolution of CdSe quantum dots
Mao-Yong Huang (2018)
Characterizing the Energetic Landscape in Solution Processable Solar Cells via Frequency Dependent Impedance Measurements
E. Wong (2018)
10.1021/acs.nanolett.6b05022
Unbalanced Hole and Electron Diffusion in Lead Bromide Perovskites.
Giselle A. Elbaz (2017)
10.1021/ACS.CHEMMATER.6B02939
Quantum Dot Solar Cell Fabrication Protocols
B. D. Chernomordik (2017)
10.1038/NENERGY.2016.16
Colloidal quantum dot solids for solution-processed solar cells
Mingjian Yuan (2016)
Semantic Scholar Logo Some data provided by SemanticScholar