Charge transfer dynamics in CsPbBr3 perovskite quantum dots–anthraquinone/fullerene (C60) hybrids

Nanoscale ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 862-869 ◽  
Author(s):  
Sadananda Mandal ◽  
Lijo George ◽  
Nikolai V. Tkachenko
Keyword(s):  
Quantum Dots ◽  
Charge Transfer ◽  
Organic Molecules ◽  
Photophysical Properties ◽  
Fullerene C60 ◽  
Colloidal Quantum Dots ◽  
Perovskite Quantum Dots ◽  
Charge Transfer Dynamics

An advantage of colloidal quantum dots, particularly perovskite quantum dots (PQDs), as photoactive components is that they easily form complexes with functional organic molecules, which results in hybrids with enriched photophysical properties.

scholarly journals Coupled Charge Transfer Dynamics and Photoluminescence Quenching in Monolayer MoS2 Decorated with WS2 Quantum Dots

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Larionette P. L. Mawlong ◽  
Abhilasha Bora ◽  
P. K. Giri
Keyword(s):  
Quantum Dots ◽  
Charge Transfer ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Kelvin Probe ◽  
Photoluminescence Quenching ◽  
Force Microscopy ◽  
Level Model ◽  
Microscopy Analysis ◽  
Charge Transfer Dynamics

AbstractHerein, we have investigated the tunability of the photoluminescence (PL) of the monolayer MoS2 (1L-MoS2) by decorating it with WS2 quantum dots (WS2 QD). The direct bandgap 1L-MoS2 and WS2 QDs are grown by chemical vapor deposition and liquid exfoliation methods, respectively. The room temperature PL spectrum of bare 1L-MoS2 is systematically quenched with its decoration with WS2 QDs at different concentrations. A decrease in the work function of 1L-MoS2 with the decoration of WS2 QDs was established from the Kelvin probe force microscopy analysis. A detailed quantitative analysis using the four-energy level model involving coupled charge transfer was employed to explain the redshift and the systematic decrease in the intensity of the PL peak in 1L-MoS2/WS2 QD heterostructure. The modulation of the PL in the heterostructure is attributed to the increase in the formation of negative trions through the charge transfer from WS2 QD to the 1L-MoS2 and thus making the 1L-MoS2 heavily n-type doped, with increase in the electron density by ~1.5 × 1013 cm−2. This study establishes the contribution of defects in the coupled charge transfer dynamics in 1L-MoS2, and it lays out a convenient strategy to manipulate the optical and electrical properties of 1L-MoS2 for various optoelectronic applications.

Charge transfer dynamics between MPA capped CdTe quantum dots and methyl viologen

2017 ◽  
Vol 346 ◽  
pp. 382-389 ◽  
Author(s):  
Alessandro Iagatti ◽  
Luigi Tarpani ◽  
Eleonora Fiacchi ◽  
Laura Bussotti ◽  
Loredana Latterini ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Charge Transfer ◽  
Methyl Viologen ◽  
Cdte Quantum Dots ◽  
Charge Transfer Dynamics

High-Resolution In Situ Patterning of Perovskite Quantum Dots via Femtosecond Laser Direct Writing

Nanoscale ◽  
2021 ◽  
Author(s):  
Shuyu Liang ◽  
Yue-Feng Liu ◽  
Shenyuan Wang ◽  
Hong Xia ◽  
Hong-Bo Sun
Keyword(s):  
Quantum Dots ◽  
High Resolution ◽  
Femtosecond Laser ◽  
Information Storage ◽  
Colloidal Quantum Dots ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Perovskite Quantum Dots ◽  
Patterning Technique

Colloidal quantum dots (QDs) have exhibited great potentials for optoelectronic applications, including display, laser, anti-counterfeiting and information storage. However, high-resolution patterning technique of QDs is still a challenge, while precise...

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