Synthetic Conditions for High-Accuracy Size Control of PbS Quantum Dots

Zhang, Jianbing; Crisp, Ryan W.; Gao, Jianbo; Kroupa, Daniel M.; Beard, Matthew C.; Luther, Joseph M.

doi:10.1021/acs.jpclett.5b00689

Title: Synthetic Conditions for High-Accuracy Size Control of PbS Quantum Dots

Journal Article · Mon May 04 00:00:00 EDT 2015 · Journal of Physical Chemistry Letters

DOI:https://doi.org/10.1021/acs.jpclett.5b00689· OSTI ID:1183797

Zhang, Jianbing ^[1]; Crisp, Ryan W. ^[2]; Gao, Jianbo ^[3]; Kroupa, Daniel M. ^[4]; Beard, Matthew C. ^[5]; Luther, Joseph M. ^[5]

School of Optical and Electronic Information, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China, Chemical and Material Sciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States
Chemical and Material Sciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States, Department of Physics, Colorado School of Mines, 1523 Illinois Street, Golden, Colorado 80401, United States
Chemical and Material Sciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States, Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
Chemical and Material Sciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States, Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
Chemical and Material Sciences Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States

Decreasing the variability in quantum dot (QD) syntheses is desirable for better uniformity of samples for use in QD-based studies and applications. Here we report a highly reproducible linear relationship between the concentration of ligand (in this case oleic acid, OA) and the lowest energy exciton peak position (nm) of the resulting PbS QDs for various hot-injection temperatures. Thus, for a given injection temperature, the size of the PbS QD product is purely controlled by the amount of OA. We used this relationship to study PbS QD solar cells that are fabricated from the same size of PbS QDs but synthesized using four different injection temperatures: 95, 120, 150, and 185 °C. We find that the power conversion efficiency does not depend on injection temperature but that the V_oc is higher for QDs synthesized at lower temperatures while the J_sc is improved in higher temperature QDs.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Advanced Solar Photophysics (CASP); National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC52-06NA25396; AC36-08G028308; AC36-08GO28308

OSTI ID:: 1183797

Alternate ID(s):: OSTI ID: 1214941; OSTI ID: 1220732

Report Number(s):: NREL/JA-5900-64079

Journal Information:: Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Vol. 6 Journal Issue: 10; ISSN 1948-7185

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 98 works

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77 NANOSCIENCE AND NANOTECHNOLOGY
nanocrystals
ligands
oleic acid
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14 SOLAR ENERGY
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Title: Synthetic Conditions for High-Accuracy Size Control of PbS Quantum Dots

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