Evidence for a "dark exciton" state of PbS nanocrystals in a silicate glass

被引：35

作者：

De Lamaëstre, RE

Bernas, H

Pacifici, D

Franzo, G

Priolo, F

机构：

[1] Univ Paris 11, CNRS, CSNSM, F-91405 Orsay, France

[2] Corning SAS, Fontainebleau Res Ctr, F-77210 Avon, France

[3] INFM, MATIS, I-95123 Catania, Italy

[4] Dipartimento Fis & Astron, I-95123 Catania, Italy

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 18期

关键词：

D O I：

10.1063/1.2201885

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

PbS nanocrystals (diameter of 5-7 nm) were synthesized via sulfur ion implantation in Pb-based glasses and postannealing. They display strong emission at around 1.5 mu m due to quantum confinement, and a very large photoluminescence (PL) excitation cross section. The PL intensity and decay rate temperature dependences provide evidence for a large energy splitting (ca. 30 meV) of the emitting exciton ground state fine structure, presumably due to the complex PbS electronic band structure. (c) 2006 American Institute of Physics.

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页数：3

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共 19 条

[1] Luminescence from processible quantum dot-polymer light emitters 1100-1600 nm: Tailoring spectral width and shape [J].

Bakueva, L ;

Konstantatos, G ;

Levina, L ;

Musikhin, S ;

Sargent, EH .

APPLIED PHYSICS LETTERS, 2004, 84 (18) :3459-3461

[2] QUANTUM CONFINEMENT OF PBS MICROCRYSTALS IN GLASS [J].

BORRELLI, NF ;

SMITH, DW .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 180 (01) :25-31

[3] Size-dependent electron-hole exchange interaction in Si nanocrystals [J].

Brongersma, ML ;

Kik, PG ;

Polman, A ;

Min, KS ;

Atwater, HA .

APPLIED PHYSICS LETTERS, 2000, 76 (03) :351-353

[4] Luminescence quenching in PbS nanoparticles [J].

Buckner, SW ;

Konold, RL ;

Jelliss, PA .

CHEMICAL PHYSICS LETTERS, 2004, 394 (4-6) :400-404

[5] SPECTROSCOPIC IDENTIFICATION OF THE LUMINESCENCE MECHANISM OF HIGHLY POROUS SILICON [J].

CALCOTT, PDJ ;

NASH, KJ ;

CANHAM, LT ;

KANE, MJ ;

BRUMHEAD, D .

JOURNAL OF LUMINESCENCE, 1993, 57 (1-6) :257-269

[6] PbS nanocrystal synthesis in Pb-containing silicate glasses -: art. no. 104310 [J].

de Lamaëstre, RE ;

Bernas, H .

JOURNAL OF APPLIED PHYSICS, 2005, 98 (10)

[7] Excitons in Si nanocrystals:: Confinement and migration effects -: art. no. 195309 [J].

Heitmann, J ;

Müller, F ;

Yi, LX ;

Zacharias, M ;

Kovalev, D ;

Eichhorn, F .

PHYSICAL REVIEW B, 2004, 69 (19) :195309-1

[8] Electronic structure and optical properties of PbS and PbSe quantum dots [J].

Kang, I ;

Wise, FW .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1997, 14 (07) :1632-1646

[9] Temperature dependence of the luminescence lifetime of single CdSe/ZnS quantum dots [J].

Labeau, O ;

Tamarat, P ;

Lounis, B .

PHYSICAL REVIEW LETTERS, 2003, 90 (25) :4

[10] Synthesis of monodisperse PbS quantum dots in phosphate glass [J].

Lipovskii, AA ;

Kolobkova, EV ;

Olkhovets, A ;

Petrikov, VD ;

Wise, F .

PHYSICA E, 1999, 5 (03) :157-160