Tuning of band-edges in type-I core–shell nanocrystals through band-offset engineering: selective quantum confinement effect

RSC Advances ◽  
2013 ◽  
Vol 3 (32) ◽  
pp. 13225 ◽  
Author(s):  
Sukumar Dey ◽  
Amlan J. Pal
Keyword(s):  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Confinement Effect ◽  
Band Offset ◽  
Core Shell ◽  
Type I

scholarly journals Quantum Confinement Effect and Photoenhancement of Photoluminescence of PbS and PbS/MnS Quantum Dots

2020 ◽  
Vol 10 (18) ◽  
pp. 6282
Author(s):  
Muhammad Safwan Zaini ◽  
Josephine Ying Chyi Liew ◽  
Shahrul Ainliah Alang Ahmad ◽  
Abdul Rahman Mohmad ◽  
Mazliana Ahmad Kamarudin
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Quantum Confinement ◽  
Shell Thickness ◽  
Quantum Confinement Effect ◽  
Band Gap Energy ◽  
Confinement Effect ◽  
Core Shell ◽  
Lead Sulphide ◽  
Peak Energy

The quantum confinement effect and photoenhancement of photoluminescence (PL) of lead sulphide (PbS) quantum dots (QDs) and lead sulphide/manganese sulphide (PbS/MnS) core shell QDs capped with thiol ligands in aqueous solution were investigated. From PL results, the presence of MnS shells gives a strong confinement effect which translates to higher emission energy in PbS/MnS core shell QDs. Increasing MnS shell thickness from 0.3 to 1.5 monolayers (ML) causes a blueshift of PL peak energies as the charge carriers concentrated in the PbS core region. Enhancement of the PL intensity of colloidal PbS and PbS/MnS core shell QDs has been observed when the samples are illuminated above the band gap energy, under continuous irradiation for 40 min. Luminescence from PbS QDs and PbS/MnS core shell QDs can be strongly influenced by the interaction of water molecules and oxygen present in aqueous solution adsorbed on the QD surface. However, PbS/MnS core shell QDs with a shell thickness of 1.5 ML did not show a PL peak energy stability as it was redshifted after 25 min, probably due to wider size distribution of the QDs.

scholarly journals Segregation, quantum confinement effect and band offset for [110] SiGe NWs

2010 ◽  
Vol 247 (8) ◽  
pp. 2096-2101 ◽  
Author(s):  
Michele Amato ◽  
Maurizia Palummo ◽  
Stefano Ossicini
Keyword(s):  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Confinement Effect ◽  
Band Offset

Tunable Quantum Confinement Effect on Non-volatile Thin Film Polymer Memory Device

2008 ◽  
Author(s):  
Augustin J. Hong ◽  
Kang L. Wang ◽  
Wei Lek Kwan ◽  
Yang Yang ◽  
Dayanara Parra ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Memory Device ◽  
Confinement Effect ◽  
Film Polymer ◽  
Polymer Memory

Quantum confinement effect in nanocomposites

2001 ◽  
Vol 182 (3-4) ◽  
pp. 251-257 ◽  
Author(s):  
D. Chakravorty ◽  
S. Banerjee ◽  
T.K. Kundu
Keyword(s):  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Confinement Effect

Size-dependent penetration of carbon dots inside the ferritin nanocages: evidence for the quantum confinement effect in carbon dots

2015 ◽  
Vol 17 (19) ◽  
pp. 12833-12840 ◽  
Author(s):  
Arpan Bhattacharya ◽  
Surajit Chatterjee ◽  
Roopali Prajapati ◽  
Tushar Kanti Mukherjee
Keyword(s):  
Carbon Dots ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Confinement Effect ◽  
Size Dependent ◽  
Pl Quenching

Size-dependent penetration of CDs through the ferritin channels has been successfully demonstrated by means of λex-dependent PL quenching of CDs by the Fe3+ ions of ferritin.

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