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

Nanoscale ◽  
2015 ◽  
Vol 7 (13) ◽  
pp. 5706-5711 ◽  
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.

scholarly journals Cascade surface modification of colloidal quantum dot inks enables efficient bulk homojunction photovoltaics

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Min-Jae Choi ◽  
F. Pelayo García de Arquer ◽  
Andrew H. Proppe ◽  
Ali Seifitokaldani ◽  
Jongmin Choi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Modification ◽  
Surface Chemistry ◽  
Surface Passivation ◽  
Diffusion Length ◽  
Power Conversion ◽  
Colloidal Quantum Dots ◽  
Semiconductor Materials ◽  
Colloidal Quantum Dot ◽  
Reduced Surface

AbstractControl over carrier type and doping levels in semiconductor materials is key for optoelectronic applications. In colloidal quantum dots (CQDs), these properties can be tuned by surface chemistry modification, but this has so far been accomplished at the expense of reduced surface passivation and compromised colloidal solubility; this has precluded the realization of advanced architectures such as CQD bulk homojunction solids. Here we introduce a cascade surface modification scheme that overcomes these limitations. This strategy provides control over doping and solubility and enables n-type and p-type CQD inks that are fully miscible in the same solvent with complete surface passivation. This enables the realization of homogeneous CQD bulk homojunction films that exhibit a 1.5 times increase in carrier diffusion length compared with the previous best CQD films. As a result, we demonstrate the highest power conversion efficiency (13.3%) reported among CQD solar cells.

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

CrystEngComm ◽  
2017 ◽  
Vol 19 (6) ◽  
pp. 946-951 ◽  
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

Surface Passivation of Luminescent Colloidal Quantum Dots with Poly(Dimethylaminoethyl methacrylate) through a Ligand Exchange Process

2004 ◽  
Vol 126 (25) ◽  
pp. 7784-7785 ◽  
Author(s):  
Xiao-Song Wang ◽  
Tieneke E. Dykstra ◽  
Mayrose R. Salvador ◽  
Ian Manners ◽  
Gregory D. Scholes ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ligand Exchange ◽  
Surface Passivation ◽  
Exchange Process ◽  
Colloidal Quantum Dots ◽  
Dimethylaminoethyl Methacrylate

Effect of surface passivation on dopant distribution in Si quantum dots: The case of B and P doping

2011 ◽  
Vol 98 (17) ◽  
pp. 173103 ◽  
Author(s):  
Jie Ma ◽  
Su-Huai Wei ◽  
Nathan R. Neale ◽  
Arthur J. Nozik
Keyword(s):  
Quantum Dots ◽  
Surface Passivation ◽  
Dopant Distribution ◽  
Si Quantum Dots ◽  
Effect Of Surface

scholarly journals Addition of Zn during the phosphine-based synthesis of indium phospide quantum dots: doping and surface passivation

2015 ◽  
Vol 6 ◽  
pp. 1237-1246 ◽  
Author(s):  
Natalia E Mordvinova ◽  
Alexander A Vinokurov ◽  
Oleg I Lebedev ◽  
Tatiana A Kuznetsova ◽  
Sergey G Dorofeev
Keyword(s):  
Quantum Dots ◽  
Surface Passivation ◽  
Particle Growth ◽  
Colloidal Quantum Dots ◽  
Synthetic Route ◽  
Zn Doping ◽  
Photochemical Etching ◽  
Wide Range ◽  
Dopant Atoms ◽  
First Time

Zinc-doped InP(Zn) colloidal quantum dots (QDs) with narrow size distribution and low defect concentration were grown for the first time via a novel phosphine synthetic route and over a wide range of Zn doping. We report the influence of Zn on the optical properties of the obtained quantum dots. We propose a mechanism for the introduction of Zn in the QDs and show that the incorporation of Zn atoms into the InP lattice leads to the formation of Zn acceptor levels and a luminescence tail in the red region of the spectra. Using photochemical etching with HF, we confirmed that the Zn dopant atoms are situated inside the InP nanoparticles. Moreover, doping with Zn is accompanied with the coverage of the QDs by a zinc shell. During the synthesis Zn myristate covers the QD nucleus and inhibits the particle growth. At the same time the zinc shell leads to an increase of the luminescence quantum yield through the reduction of phosphorous dangling bonds. A scenario for the growth of the colloidal InP(Zn) QDs was proposed and discussed.

Stability enhancement of PbS quantum dots by site-selective surface passivation for near-infrared LED application

Nano Research ◽  
2020 ◽  
Vol 14 (3) ◽  
pp. 628-634
Author(s):  
Xinsu Zhang ◽  
Yujuan Chen ◽  
Linyuan Lian ◽  
Zizhen Zhang ◽  
Yixuan Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Surface Passivation ◽  
Stability Enhancement ◽  
Site Selective ◽  
Pbs Quantum Dots

scholarly journals Influence of Different Surface Passivation on Photoelectric Properties PbS QDs

2021 ◽  
Vol 2065 (1) ◽  
pp. 012018
Author(s):  
Yingxiang Yang ◽  
Hongbin Pu ◽  
Xu Bei ◽  
Chunlan Chen ◽  
Min Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Performance Improvement ◽  
Surface Passivation ◽  
Photovoltaic Device ◽  
High Light ◽  
Organic Ligands ◽  
Photoelectric Characteristic ◽  
Photoelectric Properties ◽  
Pbs Quantum Dots

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.

scholarly journals Simple Cubic Self-Assembly of PbS Quantum Dots by Finely Controlled Ligand Removal through Gel Permeation Chromatography

2021 ◽  
Author(s):  
Jianjun Liu ◽  
Kazushi Enomoto ◽  
Kotaro Takeda ◽  
Daishi Inoue ◽  
Yong-Jin Pu
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Optoelectronic Devices ◽  
Gel Permeation Chromatography ◽  
Optoelectronic Properties ◽  
Colloidal Quantum Dots ◽  
Critical Importance ◽  
Simple Cubic ◽  
Gel Permeation ◽  
Pbs Quantum Dots

The geometry in self-assembled superlattices of colloidal quantum dots (QDs) strongly affects their optoelectronic properties and is thus of critical importance for applications in optoelectronic devices. Here, we achieve the...

scholarly journals Recent Developments of Solar Cells from PbS Colloidal Quantum Dots

2020 ◽  
Vol 10 (5) ◽  
pp. 1743 ◽  
Author(s):  
Tomasz Blachowicz ◽  
Andrea Ehrmann
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Solar Cells ◽  
Organic Molecules ◽  
Semiconductor Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Spectroscopic Techniques ◽  
Surface Molecules ◽  
Recent Developments ◽  
Pbs Quantum Dots

PbS (lead sulfide) colloidal quantum dots consist of crystallites with diameters in the nanometer range with organic molecules on their surfaces, partly with additional metal complexes as ligands. These surface molecules are responsible for solubility and prevent aggregation, but the interface between semiconductor quantum dots and ligands also influences the electronic structure. PbS quantum dots are especially interesting for optoelectronic applications and spectroscopic techniques, including photoluminescence, photodiodes and solar cells. Here we concentrate on the latter, giving an overview of the optical properties of solar cells prepared with PbS colloidal quantum dots, produced by different methods and combined with diverse other materials, to reach high efficiencies and fill factors.

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