scholarly journals Ag2ZnSnS4–ZnS core–shell colloidal quantum dots: a near-infrared luminescent material based on environmentally friendly elements

2021 ◽  
Author(s):  
Avijit Saha ◽  
Gerasimos Konstantatos
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Low Cost ◽  
Environmentally Friendly ◽  
Fold Increase ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Luminescent Material ◽  
Bio Imaging

Passivation and optimization of luminescent AZTS QDs with ZnS shells gave rise to a ∼30-fold increase in the PLQY results in RoHS compliant low-cost, bright and tunable NIR-luminescent phosphors for bio-imaging and LED applications.

scholarly journals Toward Green Optoelectronics: Environmental-Friendly Colloidal Quantum Dots Photodetectors

2021 ◽  
Vol 9 ◽  
Author(s):  
Sijia Miao ◽  
Yuljae Cho
Keyword(s):  
Heavy Metals ◽  
Quantum Dots ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Environmentally Friendly ◽  
Functional Materials ◽  
Building Blocks ◽  
Colloidal Quantum Dots ◽  
Human Beings ◽  
Ambient Conditions

Colloidal quantum dots (CQDs) have attracted tremendous research interests in future-generation energy, electronic, optoelectronic, and bio-imaging applications due to their fascinating material properties, such as solution processability at room temperature and under ambient conditions, compatibility with various functional materials, and high photostability as well as photosensitivity. Among the various optoelectronic applications of CQDs, optical light sensors, which convert photonic energy into electrical signals, have been of particular interest because they are one of the key building blocks for modern communication and imaging applications, including medical X-ray and near-infrared imaging, visible light cameras, and machine vision. However, CQDs, which have been widely researched for photodetectors (PDs) so far, contain toxic and hazardous heavy metals, namely, lead (Pb), cadmium (Cd), and mercury (Hg). These substances are extremely toxic and harmful to the environment as well as human beings. Therefore, it is highly desirable to substitute CQDs containing heavy metals with nontoxic and environmentally friendly ones to realize green optoelectronics. In this review article, we introduce various kinds of heavy metal–free CQDs and their PD applications. This article comprehensively includes working mechanisms of PDs, various kinds of nontoxic and environmentally friendly CQD-based PDs, advanced heterojunction PDs, and discussion for future perspectives.

Highly luminescent, off-stoichiometric CuxInyS2/ZnS quantum dots for near-infrared fluorescence bio-imaging

RSC Advances ◽  
2015 ◽  
Vol 5 (54) ◽  
pp. 43449-43455 ◽  
Author(s):  
Hyung Seok Choi ◽  
Youngsun Kim ◽  
Jae Chul Park ◽  
Mi Hwa Oh ◽  
Duk Young Jeon ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Zinc Sulfide ◽  
Near Infrared ◽  
Core Shell ◽  
Near Infrared Fluorescence ◽  
Photoluminescence Quantum Yield ◽  
Copper Indium ◽  
Bio Imaging ◽  
Heating Up

We synthesized highly luminescent, NIR-emitting copper–indium–sulfur/zinc sulfide (CIS/ZnS) core–shell QDs with a high photoluminescence quantum yield (about 60%) using a heating up method.

Surface Organic Ligands-Passivated Quantum Dots: Toward High-Performance Light-Emitting Diodes with Long Lifetime

2021 ◽  
Author(s):  
Lishuang Wang ◽  
Ying Lv ◽  
Jie Lin ◽  
Jialong Zhao ◽  
Xingyuan Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Ligands ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Light Emitting ◽  
Long Lifetime

For quantum dots light-emitting diodes (QLEDs), typical colloidal quantum dots (QDs) are usually composed of a core/shell heterostructure which is covered with organic ligands as surface passivated materials to confine...

Highly luminescent InP-In(Zn)P/ZnSe/ZnS core/shell/shell colloidal quantum dots with tunable emission synthesized based on growth-doping

2021 ◽  
Author(s):  
Cong Shen ◽  
Yan Qing Zhu ◽  
Zixiao Li ◽  
Jingling Li ◽  
Hong Tao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Infrared Region ◽  
Colloidal Quantum Dots ◽  
High Quality ◽  
Promising Alternative ◽  
Lower Toxicity ◽  
Near Infrared Region ◽  
Inp Quantum Dots ◽  
Tunable Emission

InP quantum dots (QDs) are considered as the most promising alternative to Cd-based QDs with the lower toxicity and emission spectrum tunability ranging from visible to near-infrared region. Although high-quality...

Advances in low-cost infrared imaging using II-VI colloidal quantum dots (Conference Presentation)

2017 ◽  
Author(s):  
Richard E. Pimpinella ◽  
Christopher Buurma ◽  
Anthony J. Ciani ◽  
Christoph H. Grein ◽  
Philippe Guyot-Sionnest
Keyword(s):  
Quantum Dots ◽  
Infrared Imaging ◽  
Low Cost ◽  
Colloidal Quantum Dots

Design and Synthesis of Highly Luminescent Near-Infrared-Emitting Water-Soluble CdTe/CdSe/ZnS Core/Shell/Shell Quantum Dots

2009 ◽  
Vol 48 (20) ◽  
pp. 9723-9731 ◽  
Author(s):  
Wenjin Zhang ◽  
Guanjiao Chen ◽  
Jian Wang ◽  
Bang-Ce Ye ◽  
Xinhua Zhong
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Water Soluble ◽  
Core Shell ◽  
Design And Synthesis
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