Nonlinear photoluminescence behavior in closely packed CdSe nanocrystal thin films

被引：35

作者：

Maenosono, S

Ozaki, E

Yoshie, K

Yamaguchi, Y

机构：

[1] Univ Tokyo, Sch Engn, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan

[2] Mitsubishi Chem Corp, Yokohama Res Ctr, Non Equilibrium Lab, Aoba Ku, Yokohama, Kanagawa 2278502, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 2001年 / 40卷 / 6B期

关键词：

nonlinear photoluminescence behavior; cooperative phenomena; kinetic model; semiconductor nanocrystal; CdSe; thin film; X-ray photoelectron spectroscopy; photoionization; photodarkening; photooxidation;

D O I：

10.1143/JJAP.40.L638

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the cooperative photoluminescence (PL) properties of closely packed CdSe nanocrystal thin films and propose a model to elucidate the nonlinear PL behavior. The PL exhibit, an initial decay and a subsequent enhancement under continuous excitation, which are attributed to the photodarkening and the effects of photooxidation (neutralization and suppression of the photoionization rate). The PL enhancement correlates with the degree of oxidation. X-ray photoelectron spectroscopy (XPS) confirms that photooxidation of nanocrystals proceeds as a function of time.

引用

收藏

页码：L638 / L641

页数：4

相关论文

共 18 条

[1] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[2] PHOTOLUMINESCENCE OF SINGLE SEMICONDUCTOR NANOCRYSTALLITES BY 2-PHOTON EXCITATION MICROSCOPY [J].

BLANTON, SA ;

DEHESTANI, A ;

LIN, PC ;

GUYOTSIONNEST, P .

CHEMICAL PHYSICS LETTERS, 1994, 229 (03) :317-322

[3] Photo-activated luminescence of CdSe quantum dot monolayers [J].

Cordero, SR ;

Carson, PJ ;

Estabrook, RA ;

Strouse, GF ;

Buratto, SK .

JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (51) :12137-12142

[4] The kinetics of growth of semiconductor nanocrystals in a hot amphiphile matrix [J].

Dushkin, CD ;

Saita, S ;

Yoshie, K ;

Yamaguchi, Y .

ADVANCES IN COLLOID AND INTERFACE SCIENCE, 2000, 88 (1-2) :37-78

[5] Quantum-confined stark effect in single CdSe nanocrystallite quantum dots [J].

Empedocles, SA ;

Bawendi, MG .

SCIENCE, 1997, 278 (5346) :2114-2117

[6] Spreading and instabilities induced by a solutal Marangoni effect [J].

Fanton, X ;

Cazabat, AM .

LANGMUIR, 1998, 14 (09) :2554-2561

[7] X-RAY PHOTOELECTRON-SPECTROSCOPY OF CDSE NANOCRYSTALS WITH APPLICATIONS TO STUDIES OF THE NANOCRYSTAL SURFACE [J].

KATARI, JEB ;

COLVIN, VL ;

ALIVISATOS, AP .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (15) :4109-4117

[8] Quantization of multiparticle Auger rates in semiconductor quantum dots [J].

Klimov, VI ;

Mikhailovsky, AA ;

McBranch, DW ;

Leatherdale, CA ;

Bawendi, MG .

SCIENCE, 2000, 287 (5455) :1011-1013

[9] Charge, polarizability, and photoionization of single semiconductor nanocrystals [J].

Krauss, TD ;

Brus, LE .

PHYSICAL REVIEW LETTERS, 1999, 83 (23) :4840-4843

[10] The band edge luminescence of surface modified CdSe nanocrystallites: Probing the luminescing state [J].

Kuno, M ;

Lee, JK ;

Dabbousi, BO ;

Mikulec, FV ;

Bawendi, MG .

JOURNAL OF CHEMICAL PHYSICS, 1997, 106 (23) :9869-9882