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

scholarly journals Recent Research Progress in Surface Ligand Exchange of PbS Quantum Dots for Solar Cell Application

2020 ◽  
Vol 10 (3) ◽  
pp. 975 ◽  
Author(s):  
Hyung Ryul You ◽  
Jin Young Park ◽  
Duck Hoon Lee ◽  
Younghoon Kim ◽  
Jongmin Choi
Keyword(s):  
Quantum Dots ◽  
Solid State ◽  
Ligand Exchange ◽  
Exchange Process ◽  
Surface States ◽  
Solution Phase ◽  
Research Progress ◽  
Solar Cell Application ◽  
Exchange Processes ◽  
Particle Size And Shape

Colloidal quantum dots (CQDs) are considered as next-generation semiconductors owing to their tunable optical and electrical properties depending on their particle size and shape. The characteristics of CQDs are mainly governed by their surface chemistry, and the ligand exchange process plays a crucial role in determining their surface states. Worldwide studies toward the realization of high-quality quantum dots have led to advances in ligand exchange methods, and these procedures are usually carried out in either solid-state or solution-phase. In this article, we review recent advances in solid-state and solution-phase ligand exchange processes that enhance the performance and stability of lead sulfide (PbS) CQD solar cells, including infrared (IR) CQD photovoltaics.

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.

Synergistic ligand exchange and UV curing of PbS quantum dots for effective surface passivation

Nanoscale ◽  
2019 ◽  
Vol 11 (47) ◽  
pp. 22832-22840 ◽  
Author(s):  
Hadi Tavakoli Dastjerdi ◽  
Daniel Prochowicz ◽  
Pankaj Yadav ◽  
Mohammad Mahdi Tavakoli
Keyword(s):  
Ligand Exchange ◽  
Surface Passivation ◽  
Exchange Process ◽  
Uv Curing ◽  
Nonradiative Recombination ◽  
Trap States ◽  
Effective Surface ◽  
Surface Trap ◽  
Effective Suppression ◽  
Pbs Quantum Dots

UV curing of PbS QDs during ligand exchange process leads to effective suppression of surface trap states and reduced nonradiative recombination.

Synthesis of cationic quantum dots via a two-step ligand exchange process

2011 ◽  
Vol 47 (11) ◽  
pp. 3069 ◽  
Author(s):  
Yi-Cheun Yeh ◽  
Debabrata Patra ◽  
Bo Yan ◽  
Krishnendu Saha ◽  
Oscar R. Miranda ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ligand Exchange ◽  
Exchange Process

Hybrid perovskite exchange of PbS quantum dots for fast and high-detectivity visible–near-infrared photodetectors

2020 ◽  
Vol 8 (23) ◽  
pp. 7812-7819
Author(s):  
Longfei Mi ◽  
Yajing Chang ◽  
Yan Zhang ◽  
Enze Xu ◽  
Yang Jiang
Keyword(s):  
Quantum Dots ◽  
Ligand Exchange ◽  
High Performance ◽  
Near Infrared ◽  
Exchange Process ◽  
Infrared Photodetectors ◽  
Hybrid Perovskite ◽  
Pbs Quantum Dots

A hybrid perovskite decorated with PbS-QDs by using a ligand exchange process to fabricate high-performance photodetectors.

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.

Acid–Base Mediated Ligand Exchange on Near-Infrared Absorbing, Indium-Based III–V Colloidal Quantum Dots

2021 ◽  
Author(s):  
Jari Leemans ◽  
Kim C. Dümbgen ◽  
Matthias M. Minjauw ◽  
Qiang Zhao ◽  
André Vantomme ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ligand Exchange ◽  
Near Infrared ◽  
Colloidal Quantum Dots ◽  
Acid Base
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