Tight-binding calculations of image-charge effects in colloidal nanoscale platelets of CdSe

被引：149

作者：

Benchamekh, R. ^{[1
]}

Gippius, N. A. ^{[2
,3
]}

Even, J. ^{[4
,5
]}

Nestoklon, M. O. ^{[1
,6
]}

Jancu, J. -M. ^{[4
,5
]}

Ithurria, S. ^{[7
,8
]}

Dubertret, B. ^{[7
,8
]}

Efros, Al. L. ^{[9
]}

Voisin, P. ^{[1
]}

机构：

[1] CNRS, Lab Photon & Nanostruct, F-91460 Marcoussis, France

[2] RAS, AM Prokhorov Gen Phys Inst, Moscow, Russia

[3] Univ Clermont Ferrand, Photochim Mol & Macromol Lab, CNRS, Inst Pascal,PHOTON N2, F-63177 Clermont Ferrand, France

[4] Univ Europeenne Bretagne, FOTON, INSA, F-35708 Rennes, France

[5] CNRS, F-35708 Rennes, France

[6] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[7] CNRS, Lab Phys & Etud Mat, F-75005 Paris, France

[8] ESPCI, F-75005 Paris, France

[9] Naval Res Lab, Washington, DC 20375 USA

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 03期

关键词：

QUANTUM-WELLS; OPTICAL-PROPERTIES; SEMICONDUCTOR NANOPLATELETS; COULOMB INTERACTION; ZINCBLENDE CDSE; NANOCRYSTALS; SPECTROSCOPY; EXCITONS; FILMS; GAAS;

D O I：

10.1103/PhysRevB.89.035307

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

CdSe nanoplatelets show perfectly quantized thicknesses of a few monolayers. They present a situation of extreme, yet well defined quantum confinement. Due to a large dielectric contrast between the semiconductor and its ligand environment, interaction between carriers and their dielectric images strongly renormalize bare single particle states. We discuss the electronic properties of this original system in an advanced tight-binding model, and show that Coulomb interactions, including self-energy corrections and enhanced electron-hole interaction, lead to exciton binding energies up to several hundred meV.

引用

页数：7

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