Photoluminescence spectroscopy of PbSe nanocrystals

被引：65

作者：

Harbold, Jeffrey M. ^{[1
]}

Wise, Frank W. ^{[1
]}

机构：

[1] Cornell Univ, Dept Appl Phys, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.76.125304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The low-energy electronic states of PbSe quantum dots are investigated using photoluminescence spectroscopies. Size-selective photoluminescence measurements produce unexpectedly broad (similar to 50 meV) emission lines. In addition, significant anti-Stokes luminescence is observed. Finally, we observe a size-dependent splitting of the lowest emission feature. Possible origins of the broad emission lines observed despite size-selective excitation and the splitting of the emission spectrum will be discussed.

引用

页数：6

共 32 条

[1] Confinement effects in PbSe quantum wells and nanocrystals [J].

Allan, G ;

Delerue, C .

PHYSICAL REVIEW B, 2004, 70 (24) :1-9

[2] SURFACE CORE-LEVEL SHIFTS AND RELAXATION OF GROUP-IVA-ELEMENT CHALCOGENIDE SEMICONDUCTORS [J].

ALLAN, G .

PHYSICAL REVIEW B, 1991, 43 (12) :9594-9598

[3] The peculiar electronic structure of PbSe quantum dots [J].

An, J. M. ;

Franceschetti, A. ;

Dudiy, S. V. ;

Zunger, Alex .

NANO LETTERS, 2006, 6 (12) :2728-2735

[4] Anisotropy-induced optical transitions in PbSe and PbS spherical quantum dots [J].

Andreev, AD ;

Lipovskii, AA .

PHYSICAL REVIEW B, 1999, 59 (23) :15402-15404

[5] Enhancement of electron-hole exchange interaction in CdSe nanocrystals: A quantum confinement effect [J].

Chamarro, M ;

Gourdon, C ;

Lavallard, P ;

Lublinskaya, O ;

Ekimov, AI .

PHYSICAL REVIEW B, 1996, 53 (03) :1336-1342

[6] Resonant energy transfer in PbS quantum dots [J].

Clark, Stephen W. ;

Harbold, Jeffrey M. ;

Wise, Frank W. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (20) :7302-7305

[7] Evidence for a "dark exciton" state of PbS nanocrystals in a silicate glass [J].

De Lamaëstre, RE ;

Bernas, H ;

Pacifici, D ;

Franzo, G ;

Priolo, F .

APPLIED PHYSICS LETTERS, 2006, 88 (18)

[8] Semiconductor nanocrystal assemblies:: Experimental pitfalls and a simple model of particle-particle interaction [J].

Döllefeld, H ;

Weller, H ;

Eychmuller, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (22) :5604-5608

[9] Optical properties of colloidal PbSe nanocrystals [J].

Du, H ;

Chen, CL ;

Krishnan, R ;

Krauss, TD ;

Harbold, JM ;

Wise, FW ;

Thomas, MG ;

Silcox, J .

NANO LETTERS, 2002, 2 (11) :1321-1324

[10] Highly efficient multiple exciton generation in colloidal PbSe and PbS quantum dots [J].

Ellingson, RJ ;

Beard, MC ;

Johnson, JC ;

Yu, PR ;

Micic, OI ;

Nozik, AJ ;

Shabaev, A ;

Efros, AL .

NANO LETTERS, 2005, 5 (05) :865-871

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