Piezoelectric coupling effect on exciton–phonon scattering rates in CdSe quantum dots embedded in glass matrix

2006 ◽  
Vol 26 (2-3) ◽  
pp. 555-558 ◽  
Author(s):  
K. Sellami ◽  
S. Jaziri
Keyword(s):  
Quantum Dots ◽  
Glass Matrix ◽  
Phonon Scattering ◽  
Coupling Effect ◽  
Cdse Quantum Dots ◽  
Piezoelectric Coupling ◽  
Scattering Rates

scholarly journals Ab initio Molecular Dynamics of CdSe Quantum Dots Doped Glasses

2019 ◽  
Author(s):  
Wenke Li ◽  
Xiujian Zhao ◽  
Chao Liu ◽  
François-Xavier Coudert
Keyword(s):  
Molecular Dynamics ◽  
Quantum Dots ◽  
Ab Initio ◽  
Glass Matrix ◽  
Distribution Functions ◽  
Interfacial Structure ◽  
Ab Initio Molecular Dynamics ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
Doped Glasses

<div> <div> <div> <p>We have probed the local atomic structure of the interfacial structure between the CdSe quantum dots (QDs) and sodium silicate glass matrix. Using ab initio molecular dynamics simulations, we determined the structural properties and bond length, in excellent agreement with previous experimental observations. Based on analysis of radial distribution functions, coordination environment and ring structures, we demonstrate that huge structure reconstruction occurs at the interface between the CdSe QDs and the glass matrix. The incorporation of the CdSe QDs disrupts the Na-O bonds, while stronger SiO4 tetrahedra are reformed. The existence of the glass matrix breaks the stable 4-member (4MR) and 6-member (6MR) of Cd-Se rings, and we observe a disassociated Cd atom dissolved in the glass matrix. Besides, the formation of Se-Na and Cd-O linkages is observed at the CdSe QDs/glass interface. These results significantly extend our understanding of the interfacial structure of the CdSe QDs doped glasses, and provide physical and chemical insight into the possible defect structure origin of CdSe QDs, of interest to the fabrication of the highly luminescent CdSe QDs doped glasses. </p> </div> </div> </div>

scholarly journals Ab initio Molecular Dynamics of CdSe Quantum Dots Doped Glasses

2019 ◽  
Author(s):  
Wenke Li ◽  
Xiujian Zhao ◽  
Chao Liu ◽  
François-Xavier Coudert
Keyword(s):  
Molecular Dynamics ◽  
Quantum Dots ◽  
Ab Initio ◽  
Glass Matrix ◽  
Distribution Functions ◽  
Interfacial Structure ◽  
Ab Initio Molecular Dynamics ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
Doped Glasses

<div> <div> <div> <p>We have probed the local atomic structure of the interfacial structure between the CdSe quantum dots (QDs) and sodium silicate glass matrix. Using ab initio molecular dynamics simulations, we determined the structural properties and bond length, in excellent agreement with previous experimental observations. Based on analysis of radial distribution functions, coordination environment and ring structures, we demonstrate that huge structure reconstruction occurs at the interface between the CdSe QDs and the glass matrix. The incorporation of the CdSe QDs disrupts the Na-O bonds, while stronger SiO4 tetrahedra are reformed. The existence of the glass matrix breaks the stable 4-member (4MR) and 6-member (6MR) of Cd-Se rings, and we observe a disassociated Cd atom dissolved in the glass matrix. Besides, the formation of Se-Na and Cd-O linkages is observed at the CdSe QDs/glass interface. These results significantly extend our understanding of the interfacial structure of the CdSe QDs doped glasses, and provide physical and chemical insight into the possible defect structure origin of CdSe QDs, of interest to the fabrication of the highly luminescent CdSe QDs doped glasses. </p> </div> </div> </div>

Understanding the atomic and electronic structures origin of defect luminescence of CdSe quantum dots in glass matrix

2019 ◽  
Vol 102 (9) ◽  
pp. 5375-5385 ◽  
Author(s):  
Wenke Li ◽  
Neng Li ◽  
Chao Liu ◽  
George Neville Greaves ◽  
Wee‐Jun Ong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electronic Structures ◽  
Glass Matrix ◽  
Cdse Quantum Dots ◽  
Defect Luminescence

Induced Birefringence in CdSe Quantum Dots in Phosphate Glass Matrix

2021 ◽  
Vol 129 (1) ◽  
pp. 102-109
Author(s):  
V. I. Krasovskii ◽  
S. I. Rasmagin
Keyword(s):  
Quantum Dots ◽  
Phosphate Glass ◽  
Glass Matrix ◽  
Cdse Quantum Dots
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