scholarly journals Mechanism of Mn emission: Energy transfer vs charge transfer dynamics in Mn-doped quantum dots

APL Materials ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 020901 ◽  
Author(s):  
Pradeep K. R. ◽  
Ranjani Viswanatha
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Charge Transfer ◽  
Emission Energy ◽  
Doped Quantum Dots ◽  
Charge Transfer Dynamics ◽  
Mn Doped

Bright type-II photoluminescence from Mn-doped CdS/ZnSe/ZnS quantum dots with Mn2+ ions as exciton couplers

Nanoscale ◽  
2017 ◽  
Vol 9 (46) ◽  
pp. 18281-18289 ◽  
Author(s):  
Ruilin Xu ◽  
Chen Liao ◽  
Yanqing Xu ◽  
Chunfeng Zhang ◽  
Min Xiao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Charge Transfer ◽  
Type Ii ◽  
Exciton Emission ◽  
Transfer Stations ◽  
Mn Doped

Mn2+ ions act as energy-transfer-stations of hot excitons (coupling-1) and couplers of cold excitons (coupling-2) to enhance charge-transfer exciton emission.

Electron Paramagnetic Resonance in Ge/Si Heterostructures with Mn-Doped Quantum Dots

JETP Letters ◽  
2019 ◽  
Vol 109 (4) ◽  
pp. 270-275
Author(s):  
A. F. Zinovieva ◽  
V. A. Zinovyev ◽  
N. P. Stepina ◽  
A. V. Katsuba ◽  
A. V. Dvurechenskii ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electron Paramagnetic Resonance ◽  
Paramagnetic Resonance ◽  
Doped Quantum Dots ◽  
Electron Paramagnetic ◽  
Mn Doped

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

Energy-Transfer and Charge-Transfer Dynamics in Highly Fluorescent Naphthalimide–BODIPY Dyads: Effect of BODIPY Orientation

2019 ◽  
Vol 123 (40) ◽  
pp. 24362-24374 ◽  
Author(s):  
Benedetta Carlotti ◽  
Madhurima Poddar ◽  
Fausto Elisei ◽  
Anna Spalletti ◽  
Rajneesh Misra
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Charge Transfer Dynamics
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