Vibrational spectroscopy of compound semiconductor nanocrystals

VM Dzhagan, YM Azhniuk, AG Milekhin… - Journal of Physics D …, 2018 - iopscience.iop.org
A review of recent applications of Raman spectroscopy as a fast, sensitive, and non-
destructive technique for exploring II–VI semiconductor nanocrystals fabricated by various …

Phonon Raman spectroscopy of nanocrystalline multinary chalcogenides as a probe of complex lattice structures

V Dzhagan, AP Litvinchuk, MY Valakh… - Journal of Physics …, 2022 - iopscience.iop.org
Abstract Ternary (I–III–VI) and quaternary (I–II–IV–VI) metal-chalcogenides like CuInS 2 or
Cu 2 ZnSn (S, Se) 4 are among the materials currently most intensively investigated for …

Investigating the correlation between the Urbach energy and asymmetry parameter of the Raman mode in semiconductors

OV Rambadey, A Kumar, PR Sagdeo - Physical Review B, 2021 - APS
A quantitative correlation between the Urbach energy (E u) and asymmetry parameter q of
Raman spectra has been derived. For this purpose, the effect of electronic disorder (∼ E u) …

Raman-and IR-active phonons in CdSe/CdS core/shell nanocrystals in the presence of interface alloying and strain

VM Dzhagan, MY Valakh, AG Milekhin… - The Journal of …, 2013 - ACS Publications
Semiconductor core–shell nanocrystals (NCs) have greatly improved luminescent properties
including better resistance to photobleaching and ligand exchange. It was suggested that …

Phonon Raman spectra of colloidal CdTe nanocrystals: effect of size, non-stoichiometry and ligand exchange

V Dzhagan, I Lokteva, C Himcinschi, X **… - Nanoscale research …, 2011 - Springer
Resonant Raman study reveals the noticeable effect of the ligand exchange on the
nanocrystal (NC) surface onto the phonon spectra of colloidal CdTe NC of different size and …

Analysis of structural disorder on Raman spectra of semiconductors

OV Rambadey, M Gupta, A Kumar… - Journal of Applied …, 2023 - pubs.aip.org
This Tutorial provides a fundamental discussion on the lattice dynamics of physical systems
introduced with disorder and, hence, the importance of Raman spectroscopy (RS) technique …

Raman characterization of Cu 2 ZnSnS 4 nanocrystals: Phonon confinement effect and formation of Cu x S phases

Y Havryliuk, MY Valakh, V Dzhagan, O Greshchuk… - RSC …, 2018 - pubs.rsc.org
A Raman spectroscopic study of Cu2ZnSnS4 (CZTS) nanocrystals (NCs) produced by a
“green” synthesis in aqueous solutions is reported. Size-selected CZTS NCs reveal phonon …

Modified phonon confinement model and its application to CdSe/CdS core–shell magic-sized quantum dots synthesized in aqueous solution by a new route

ACA Silva, ESF Neto, SW da Silva… - The Journal of …, 2013 - ACS Publications
In this study we present modifications in a phonon confinement model in order to obtain a
better description for the Raman spectra of spherical nanocrystals, namely: bare-core, core …

Impact of D2O/H2O Solvent Exchange on the Emission of HgTe and CdTe Quantum Dots: Polaron and Energy Transfer Effects

Q Wen, SV Kershaw, S Kalytchuk, O Zhovtiuk… - ACS …, 2016 - ACS Publications
We have studied light emission kinetics and analyzed carrier recombination channels in
HgTe quantum dots that were initially grown in H2O. When the solvent is replaced by D2O …

Exciton–phonon interactions govern charge-transfer-state dynamics in CdSe/CdTe two-dimensional colloidal heterostructures

R Pandya, RYS Chen, A Cheminal… - Journal of the …, 2018 - ACS Publications
CdSe/CdTe core–crown type-II nanoplatelet heterostructures are two-dimensional
semiconductors that have attracted interest for use in light-emitting technologies due to their …