Highly Effective Surface Passivation of PbSe Quantum Dots through Reaction with Molecular Chlorine

2012 ◽  
Vol 134 (49) ◽  
pp. 20160-20168 ◽  
Author(s):  
Wan Ki Bae ◽  
Jin Joo ◽  
Lazaro A. Padilha ◽  
Jonghan Won ◽  
Doh C. Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Passivation ◽  
Molecular Chlorine ◽  
Effective Surface ◽  
Highly Effective

Effective surface passivation of multi-shelled InP quantum dots through a simple complexing with titanium species

2018 ◽  
Vol 428 ◽  
pp. 906-911 ◽  
Author(s):  
Jung-Ho Jo ◽  
Min-Seok Kim ◽  
Chang-Yeol Han ◽  
Eun-Pyo Jang ◽  
Young Rag Do ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Passivation ◽  
Effective Surface ◽  
Inp Quantum Dots

scholarly journals On the Myth of “Red/Near-IR Carbon Quantum Dots” from Thermal Processing of Specific Colorless Organic Precursors

2021 ◽  
Author(s):  
Weixiong Liang ◽  
Ping Wang ◽  
Mohammed Meziani ◽  
Lin Ge ◽  
Liju Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Thermal Processing ◽  
Carbon Nanoparticles ◽  
Organic Molecules ◽  
Surface Passivation ◽  
Carbon Quantum Dots ◽  
Effective Surface ◽  
Chemical Functionalization ◽  
Near Ir ◽  
Organic Precursors

Carbon dots were originally found and reported as surface-passivated small carbon nanoparticles, where the effective surface passivation was the chemical functionalization of the carbon nanoparticles with organic molecules. Understandably, the...

Boosting the performance of eco-friendly quantum dots-based photoelectrochemical cells via effective surface passivation

Nano Energy ◽  
2020 ◽  
Vol 76 ◽  
pp. 105062 ◽  
Author(s):  
Xin Tong ◽  
Ali Imran Channa ◽  
Yimin You ◽  
Peipei Wei ◽  
Xin Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Passivation ◽  
Photoelectrochemical Cells ◽  
Effective Surface

Optical Characteristics of CdSe Quantum Dots Depending on Growth Conditions and Surface Passivation

2008 ◽  
Vol 8 (9) ◽  
pp. 4899-4902 ◽  
Author(s):  
Soon Il Jung ◽  
Hyun Young Yeo ◽  
Ilgu Yun ◽  
Sung M. Cho ◽  
Il Ki Han ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Growth Temperature ◽  
Matrix Method ◽  
Surface Passivation ◽  
Growth Conditions ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
Effective Surface ◽  
Organometallic Reagents

We investigated the effects of different growth conditions and surface passivation on the growth of CdSe quantum dots (QDs). The synthesis of CdSe QDs by pyrolysis of organometallic reagents was performed by using the hot-matrix method. In order to modify the size and quality of CdSe QDs, we controlled the growth temperature from 250 °C to 350 °C and the relative amount of trioctylphosphin (as the ligand of the Cd and Se precursors) to be injected into the coordinating solvent trioctylphosphineoxide. Moreover, an effective surface passivation of mono-disperse CdSe QDs was achieved by overcoating them with a larger band gap material, such as ZnS.

scholarly journals An investigation into the effective surface passivation of quantum dots by a photo-assisted chemical method

AIP Advances ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 015017 ◽  
Author(s):  
So-Yeong Joo ◽  
Hyun-Su Park ◽  
Do-yeon Kim ◽  
Bum-Sung Kim ◽  
Chan Gi Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Chemical Method ◽  
Surface Passivation ◽  
Effective Surface

Investigation of the Surface Passivation Effect on the Optical Properties of CsPbBr3 Perovskite Quantum Dots

2021 ◽  
Vol 23 ◽  
pp. 100948
Author(s):  
Saif M.H. Qaid ◽  
Hamid M. Ghaithan ◽  
Bandar Ali Al-Asbahi ◽  
Abdullah S. Aldwayyan
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Surface Passivation ◽  
Perovskite Quantum Dots

Surface Passivation by Congeneric Quantum Dots for High-Performance and Stable CsPbBr3-Based Photodetectors

2021 ◽  
Author(s):  
Shikai Yan ◽  
Sheng Tang ◽  
Manman Luo ◽  
Lu Xue ◽  
Shilin Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Surface Passivation ◽  
Low Cost ◽  
Optoelectronic Properties ◽  
Solution Processing

CsPbBr3-based photodetectors (PDs) have aroused enormous attention owing to their low-cost solution processing, outstanding optoelectronic properties, and remarkable stability. However, their performances remain a big challenge to meet the requirement...

scholarly journals Influence of TOPO and TOPO-CdSe/ZnS Quantum Dots on Luminescence Photodynamics of InP/InAsP/InPHeterostructure Nanowires

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 640
Author(s):  
Artem I. Khrebtov ◽  
Vladimir V. Danilov ◽  
Anastasia S. Kulagina ◽  
Rodion R. Reznik ◽  
Ivan D. Skurlov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Excited States ◽  
Molecular Beam ◽  
Surface Passivation ◽  
Low Energy ◽  
Trioctylphosphine Oxide ◽  
Reverse Transfer ◽  
Semiconductor Heterostructure ◽  
Ligand Type

The passivation influence by ligands coverage with trioctylphosphine oxide (TOPO) and TOPO including colloidal CdSe/ZnS quantum dots (QDs) on optical properties of the semiconductor heterostructure, namely an array of InP nanowires (NWs) with InAsP nanoinsertion grown by Au-assisted molecular beam epitaxy on Si (111) substrates, was investigated. A significant dependence of the photoluminescence (PL) dynamics of the InAsP insertions on the ligand type was shown, which was associated with the changes in the excitation translation channels in the heterostructure. This change was caused by a different interaction of the ligand shells with the surface of InP NWs, which led to the formation of different interfacial low-energy states at the NW-ligand boundary, such as surface-localized antibonding orbitals and hybridized states that were energetically close to the radiating state and participate in the transfer of excitation. It was shown that the quenching of excited states associated with the capture of excitation to interfacial low-energy traps was compensated by the increasing role of the “reverse transfer” mechanism. As a result, the effectiveness of TOPO-CdSe/ZnS QDs as a novel surface passivation coating was demonstrated.

Sign in / Sign up

Export Citation Format

Share Document