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

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...

Visible and Near-Infrared, Multiparametric, Ultrasensitive Nanothermometer Based on Dual-Emission Colloidal Quantum Dots

ACS Photonics ◽  
2019 ◽  
Vol 6 (10) ◽  
pp. 2479-2486 ◽  
Author(s):  
Jiabin Liu ◽  
Hui Zhang ◽  
Gurpreet Singh Selopal ◽  
Shuhui Sun ◽  
Haiguang Zhao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Colloidal Quantum Dots ◽  
Dual Emission

scholarly journals Ligand-Length Modification in CsPbBr3 Perovskite Nanocrystals and Bilayers with PbS Quantum Dots for Improved Photodetection Performance

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1297 ◽  
Author(s):  
Juan Navarro Arenas ◽  
Ananthakumar Soosaimanickam ◽  
Hamid Pashaei Adl ◽  
Rafael Abargues ◽  
Pablo P. Boix ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Surface Chemistry ◽  
Optical Sensors ◽  
Ligand Exchange ◽  
Near Infrared ◽  
Future Internet ◽  
Single Step ◽  
Perovskite Nanocrystals ◽  
Internet Of Things Technology ◽  
Pbs Quantum Dots

Nanocrystals surface chemistry engineering offers a direct approach to tune charge carrier dynamics in nanocrystals-based photodetectors. For this purpose, we have investigated the effects of altering the surface chemistry of thin films of CsPbBr3 perovskite nanocrystals produced by the doctor blading technique, via solid state ligand-exchange using 3-mercaptopropionic acid (MPA). The electrical and electro-optical properties of photovoltaic and photoconductor devices were improved after the MPA ligand exchange, mainly because of a mobility increase up to 5 × 10−3 cm 2 / Vs . The same technology was developed to build a tandem photovoltaic device based on a bilayer of PbS quantum dots (QDs) and CsPbBr3 perovskite nanocrystals. Here, the ligand exchange was successfully carried out in a single step after the deposition of these two layers. The photodetector device showed responsivities around 40 and 20 mA/W at visible and near infrared wavelengths, respectively. This strategy can be of interest for future visible-NIR cameras, optical sensors, or receivers in photonic devices for future Internet-of-Things technology.

Manganese doped eco-friendly CuInSe2 colloidal quantum dots for boosting near-infrared photodetection performance

2021 ◽  
Vol 403 ◽  
pp. 126452
Author(s):  
Ruiqi Guo ◽  
Jie Meng ◽  
Weihua Lin ◽  
Aqiang Liu ◽  
Tönu Pullerits ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Colloidal Quantum Dots ◽  
Infrared Photodetection

Ag2Te Colloidal Quantum Dots for Near-Infrared-II Photodetectors

2021 ◽  
Author(s):  
Jianying Ouyang ◽  
Neil Graddage ◽  
Jianping Lu ◽  
Yufang Zhong ◽  
Ta-Ya Chu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Colloidal 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

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.

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