Photobrightening and photodarkening in CdSe nanocrystal/polymer thin films

被引：5

作者：

Asami, Harumi ^{[1
]}

Kamiya, Itaru ^{[1
]}

Hara, Masahiko ^{[1
]}

机构：

[1] Tokyo Inst Technol, Midori Ku, Yokohama, Kanagawa 2268503, Japan

来源：

International Journal of Nanoscience, Vol 1, Nos 5 and 6 | 2002年 / 1卷 / 5-6期

关键词：

CdSe nanocrystals; nanocrystal/polymer thin film; photobrightening; photodarkening;

D O I：

10.1142/S0219581X02000814

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The change in the photoluminescence intensity of CdSe nanocrystal./polymer thin films with duration of illumination is investigated. The choice of polymer has an influence on photobrightening and photodarkening. In particular, photodarkening in CdSe nanocrystal/poly(vinyl carbazole) thin film occurs immediately upon illumination, in contrast to the slow changes observed with polystyrene and poly(2-vinylpridine). We discuss the mechanisms of this phenomenon in comparison with interaction between surface of CdSe nanocrystals and polymer side chain.

引用

页码：641 / 644

页数：4

共 10 条

[1]

ASAMI H, 2001, MAT RES SOC S P, V636

[2] 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

[3] (CdSe)ZnS core-shell quantum dots: Synthesis and characterization of a size series of highly luminescent nanocrystallites [J].

Dabbousi, BO ;

RodriguezViejo, J ;

Mikulec, FV ;

Heine, JR ;

Mattoussi, H ;

Ober, R ;

Jensen, KF ;

Bawendi, MG .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (46) :9463-9475

[4] Spectroscopy of single CdSe nanocrystallites [J].

Empedocles, S ;

Bawendi, M .

ACCOUNTS OF CHEMICAL RESEARCH, 1999, 32 (05) :389-396

[5]

Gaponenko S.V., 1998, OPTICAL PROPERTIES S

[6] Fabrication of Polymer/Inorganic nanoparticles composite films based on coordinative bonds [J].

Hao, EC ;

Wang, LY ;

Zhang, JH ;

Yang, B ;

Zhang, X ;

Shen, JC .

CHEMISTRY LETTERS, 1999, (01) :5-6

[7] Surface transformation and photoinduced recovery in CdSe nanocrystals [J].

Hess, BC ;

Okhrimenko, IG ;

Davis, RC ;

Stevens, BC ;

Schulzke, QA ;

Wright, KC ;

Bass, CD ;

Evans, CD ;

Summers, SL .

PHYSICAL REVIEW LETTERS, 2001, 86 (14) :3132-3135

[8] Nonlinear photoluminescence behavior in closely packed CdSe nanocrystal thin films [J].

Maenosono, S ;

Ozaki, E ;

Yoshie, K ;

Yamaguchi, Y .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 2001, 40 (6B) :L638-L641

[9] SYNTHESIS AND CHARACTERIZATION OF NEARLY MONODISPERSE CDE (E = S, SE, TE) SEMICONDUCTOR NANOCRYSTALLITES [J].

MURRAY, CB ;

NORRIS, DJ ;

BAWENDI, MG .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1993, 115 (19) :8706-8715

[10] Fluorescence intermittency in single cadmium selenide nanocrystals [J].

Nirmal, M ;

Dabbousi, BO ;

Bawendi, MG ;

Macklin, JJ ;

Trautman, JK ;

Harris, TD ;

Brus, LE .

NATURE, 1996, 383 (6603) :802-804

← 1 →