Luminescence properties of thiol-stabilized CdTe nanocrystals

被引：182
作者：
Kapitonov, AM
Stupak, AP
Gaponenko, SV
Petrov, EP
Rogach, AL
Eychmüller, A
机构：
[1] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany
[2] Natl Acad Sci Belarus, BI Stepanov Phys Inst, Minsk 220072, BELARUS
[3] Natl Acad Sci Belarus, Inst Mol & Atom Phys, Minsk 220072, BELARUS
[4] Belarusian State Univ, Phys Chem Res Inst, Minsk 220080, BELARUS
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 46期
关键词：
D O I：
10.1021/jp9921809
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Thiol-capped CdTe nanocrystals with cubic zinc blende structure are synthesized in aqueous solution. Their steady-state and time-resolved luminescence characteristics are studied at room and liquid nitrogen temperatures. A strong exciton luminescence peak at 2.3 eV dominates the emission spectrum of CdTe nanocrystals at room temperature, whereas the trap band centered at 2.0 eV undergoes substantial temperature quenching. Luminescence excitation spectra reveal different channels leading to radiative recombination via either excitons or traps. The mean luminescence decay time of CdTe nanocrystals at room temperature decreases from 120 ns at 1.94 eV to 20 ns at 2.43 eV. Luminescence:decay kinetics of CdTe nanocrystals are strongly nonexponential and are described by extremely bread lifetime distributions lying within the range from a few hundred picoseconds to a few hundred nanoseconds.
引用
收藏
页码：10109 / 10113
页数：5
相关论文
共 51 条
[1]   Nature of luminescent surface states of semiconductor nanocrystallites [J].
Allan, G ;
Delerue, C ;
Lannoo, M .
PHYSICAL REVIEW LETTERS, 1996, 76 (16) :2961-2964
[2]   STRUCTURAL PHASE-BEHAVIOR IN II-VI SEMICONDUCTOR NANOPARTICLES [J].
BANDARANAYAKE, RJ ;
WEN, GW ;
LIN, JY ;
JIANG, HX ;
SORENSEN, CM .
APPLIED PHYSICS LETTERS, 1995, 67 (06) :831-833
[3]  
BANYAI L, 1993, SEMICONDUCTOR QUANTU
[4]   ELECTRONIC-STRUCTURE AND PHOTOEXCITED-CARRIER DYNAMICS IN NANOMETER-SIZE CDSE CLUSTERS [J].
BAWENDI, MG ;
WILSON, WL ;
ROTHBERG, L ;
CARROLL, PJ ;
JEDJU, TM ;
STEIGERWALD, ML ;
BRUS, LE .
PHYSICAL REVIEW LETTERS, 1990, 65 (13) :1623-1626
[5]   LUMINESCENCE OF SILICON MATERIALS - CHAINS, SHEETS, NANOCRYSTALS, NANOWIRES, MICROCRYSTALS, AND POROUS SILICON [J].
BRUS, L .
JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (14) :3575-3581
[6]   QUANTUM CRYSTALLITES AND NONLINEAR OPTICS [J].
BRUS, L .
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1991, 53 (06) :465-474
[7]   HIGHLY MONODISPERSE QUANTUM SIZED CDS PARTICLES BY SIZE-SELECTIVE PRECIPITATION [J].
CHEMSEDDINE, A ;
WELLER, H .
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1993, 97 (04) :636-637
[8]  
COLVIN VL, 1994, NATURE, V370, P354, DOI 10.1038/370354a0
[9]   ELECTROLUMINESCENCE FROM CDSE QUANTUM-DOT POLYMER COMPOSITES [J].
DABBOUSI, BO ;
BAWENDI, MG ;
ONITSUKA, O ;
RUBNER, MF .
APPLIED PHYSICS LETTERS, 1995, 66 (11) :1316-1318
[10]   PROBING OF THE QUANTUM-DOT SIZE DISTRIBUTION IN CDTE-DOPED GLASSES BY PHOTOLUMINESCENCE EXCITATION SPECTROSCOPY [J].
DEOLIVEIRA, CRM ;
DEPAULA, AM ;
PLENTZ, FO ;
NETO, JAM ;
BARBOSA, LC ;
ALVES, OL ;
MENEZES, EA ;
RIOS, JMM ;
FRAGNITO, HL ;
CRUZ, CHB ;
CESAR, CL .
APPLIED PHYSICS LETTERS, 1995, 66 (04) :439-441
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