Influence of Different Surface Passivation on Photoelectric Properties PbS QDs

Abstract The photoelectric characteristic of ITO/PbS quantum dots (QDs)/Al structure based single and hybrid iodine ions(I−) passivated PbS QDs have been investigated. The ITO/PbS QDs/Al structure with hybrid I− passivation have demonstrated a high light dark ratio of 565.5 at -2V. It is the result of removing more organic ligands on the surface of PbS QDs and introducing larger amount of I−. This work demonstrates that the hybrid I− passivated process has great potential in the performance improvement of PbS QDs based photovoltaic device.

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Fabrication of fast and sensitive IR-detectors based on PbS quantum dots passivated by organic ligands

physica status solidi (a) ◽

10.1002/pssa.201228733 ◽

2012 ◽

Vol 210 (2) ◽

pp. 420-424 ◽

Cited By ~ 8

Author(s):

S. Miri ◽

A. Rostami ◽

M. Dolatyari ◽

H. Baghban ◽

H. Rasooli ◽

...

Keyword(s):

Quantum Dots ◽

Organic Ligands ◽

Ir Detectors ◽

Pbs Quantum Dots

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The effect of surface passivation on the structure of sulphur-rich PbS colloidal quantum dots for photovoltaic application

Nanoscale ◽

10.1039/c4nr07006b ◽

2015 ◽

Vol 7 (13) ◽

pp. 5706-5711 ◽

Cited By ~ 23

Author(s):

Victor Malgras ◽

Andrew Nattestad ◽

Yusuke Yamauchi ◽

Shi Xue Dou ◽

Jung Ho Kim

Keyword(s):

Quantum Dots ◽

Structural Study ◽

Surface Passivation ◽

Colloidal Quantum Dots ◽

Atmospheric Conditions ◽

Photovoltaic Application ◽

Pbs Quantum Dots ◽

Effect Of Surface

In-depth structural study of methanol treated S-rich PbS quantum dots undergoing hydroxylation under atmospheric conditions.

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A Photovoltaic Device Based on PbS Quantum Dots

ECS Meeting Abstracts ◽

10.1149/ma2017-01/41/1886 ◽

2017 ◽

Keyword(s):

Quantum Dots ◽

Photovoltaic Device ◽

Pbs Quantum Dots

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Role of Cation-Anion Organic Ligands for Optical Properties of Fully Inorganic Perovskite Quantum Dots

MRS Advances ◽

10.1557/adv.2018.552 ◽

2018 ◽

Vol 3 (55) ◽

pp. 3255-3261 ◽

Cited By ~ 4

Author(s):

Aaron Forde ◽

Talgat Inerbaev ◽

Dmitri Kilin

Keyword(s):

Quantum Dots ◽

Surface Passivation ◽

Binding Energies ◽

Organic Ligands ◽

Trap States ◽

Light Emitting ◽

Inorganic Perovskite ◽

Perovskite Quantum Dots ◽

Reasonable Choice

ABSTRACTApplication of lead-halide perovskite nanostructures for photovoltaic and light emitting applications depends on fashion of the surface termination. The reasonable choice of surface ligands for perovskite nanostructures prevent formation of trap states and contribute to chemical stability, wide opening of the bandgap, and intensity of absorption and photoluminescence of perovskite nanostructures. This work provides atomistic arguments for dual ligand protocol of surface passivation of fully inorganic perovskite quantum dots with fully organic ligands being a mix of cations (ethyl-ammonium) and anions (acetic) in nearly equal proportions. Computed binding energies of either individual ligands or anion-cation pairs demonstrate high stability in comparison to thermal energy and are concluded to be favourable choice in synthesis of colloidal perovskite quantum dots for light emitting applications.

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Low cost and large scale synthesis of PbS quantum dots with hybrid surface passivation

CrystEngComm ◽

10.1039/c6ce02471h ◽

2017 ◽

Vol 19 (6) ◽

pp. 946-951 ◽

Cited By ~ 12

Author(s):

Zhen Huang ◽

Guangmei Zhai ◽

Zhiming Zhang ◽

Changwang Zhang ◽

Yong Xia ◽

...

Keyword(s):

Quantum Dots ◽

Large Scale ◽

Surface Passivation ◽

Low Cost ◽

Large Scale Synthesis ◽

Pbs Quantum Dots

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Plasma Synthesis and Surface Passivation of Silicon Quantum Dots with Photoluminescence Quantum Yields higher than 60%

MRS Proceedings ◽

10.1557/proc-0934-i01-04 ◽

2006 ◽

Vol 934 ◽

Author(s):

Lorenzo Mangolini ◽

David Jurbergs ◽

Elena Rogojina ◽

Uwe Kortshagen

Keyword(s):

Quantum Dots ◽

Silicon Nanocrystals ◽

Room Temperature ◽

Surface Passivation ◽

Organic Ligands ◽

Quantum Yields ◽

Plasma Synthesis ◽

Silicon Quantum Dots ◽

Chemical Surface ◽

Wet Chemical

ABSTRACTSilicon nanocrystals with diameters of less than 5 nm show efficient room temperature pho-toluminescence (PL). Previous reports of PL quantum yields for ensembles of silicon quantum dots have usually been in the few percent range, and generally less than 30%. Here we report the plasma synthesis of silicon quantum dots and their subsequent wet-chemical surface passivation with organic ligands while strictly excluding oxygen. Photoluminescence quantum yields as high as 62% have been achieved at peak wavelengths of about 789 nm.

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