CdSeS合金量子点的非线性组分效应研究

万真; 付红红; 袁斌霞; 栾伟玲

PDF(1836 KB)

航空材料学报 ›› 2011, Vol. 31 ›› Issue (6) : 50-54.

扫码查看或转发全文

论文

CdSeS合金量子点的非线性组分效应研究

作者信息 +

CdSeS Alloyed Quantum Dots and its Nonlinear Composition Effect

Author information +

文章历史 +

摘要

利用毛细管微反应装置实现了三元合金CdSeS量子点的高效、可控合成，并考查了合成温度、前驱体浓度等对CdSeS量子点性能的影响。通过对前驱体浓度的调控，实现了荧光发射波长在520～629 nm范围连续可调的CdSeS量子点的合成，并验证了合金量子点的非线性组分效应；利用高分辨透射电镜（HRTEM）、X射线衍射（XRD）、电子能谱（EDS）对合成的CdSeS量子点进行了结构和形貌表征。通过ZnS壳层包裹CdSeS，制备了核壳结构量子点，提高了荧光量子产率。

Abstract

Alloyed quantum dots (QDs) own tunable absorption and photoluminescence (PL) properties via the variation of chemical composition. Capillary microfluidic reactor was utilized for the controlled synthesis of ternary CdSeS QDs in an accelerated manner. The experimental results show that the synthesis conditions including the synthetic temperature and the concentration of precursors play important role in the PL properties of CdSeS QDs, the PL wavelength ranged from 520 nm to 629 nm is continuously adjusted. Moreover, the nonlinear composition effect was proved. The successful formation of alloyed QDs was confirmed by transmission electron microscopy (TEM), Xray diffraction (XRD) and Energydispersive Xray spectroscopy (EDS) study. Besides, CdSeS/ZnS core/shell QDs with excellent color purity were prepared aiming at the improvement of PL quantum yields.Key words: CdSeS QDs; microreaction; nonlinear effect

关键词

CdSeS量子点 / 微反应 / 非线性效应

引用本文

EndNote

Ris (Procite)

Bibtex

导出引用

万真, 付红红, 袁斌霞, 栾伟玲. CdSeS合金量子点的非线性组分效应研究[J]. 航空材料学报, 2011, 31(6): 50-54

WAN Zhen, FU Hong-hong, YUAN Bin-xia, LUAN Wei-ling. CdSeS Alloyed Quantum Dots and its Nonlinear Composition Effect[J]. Journal of Aeronautical Materials, 2011, 31(6): 50-54

参考文献

GAPONIK N,HICKEY S G,DORFS D,et al.Progress in the light emission of colloidal semiconductor nanocrystals[J].Small,2010,6(13):1364-1378.

REGULACIO M D,HAN M Y.Composition-tunable alloyed semiconductor nanocrystals[J].Accounts of Chemical Research,2010,43(5):621-530.

DENG Z T,YAN H,LIU Y.Band gap engineering of quaternary-alloyed ZnCdSSe quantum dots via a facile phosphine-free colloidal method[J].Journal of the American Chemical Society,2009,131(49):17744-17745.
QUYANG J Y,VINCENT M,KINGSTON D,et al.Noninjection,one-pot synthesis of photoluminescent colloidal homogeneously alloyed CdSeS quantum dots[J].Journal of Physical Chemistry(C),2009,113(13):5193-5200.

JANG E,JUN S,PU L.High quality CdSeS nanocrystals synthesized by facile single injection process and their electroluminescence[J].Chemical Communications,2003,(24) 3:2964-2965.

AL-SALIM N,YOUNG A G,TILLEY R D,et al.Synthesis of CdSeS Nanocrystals in Coordinating and noncoordinating solvents:solvent's role in evolution of the optical and structural properties[J].Chemistry of Materials,2007,19(21):5185-5193.
MURRAY C B,NORRIS D J,BAWENDI M G.Synthesis and characterization of nearly monodisperse CdE(E =sulfur,selenium,tellurium) semiconductor nanocrystallite[J].Journal of the American Chemical Society,1993,115(19):8706-8715.

NIGHTINGALE A M,DE MELLO J C.Microscale synthesis of quantum dots[J].Journal of Materials Chemistry,2010,20(39):8454-8463.
JAHN A,REINER J E,VREELAND W N,et al.Preparation of nanoparticles by continuous-flow microfluidics[J].Journal of Nanoparticle Research,2008,10(6):925-934.

WAN Z,HONG W Y,LUAN W L,et al.Facile synthesis of monodisperse CdS nanocrystals via microreaction[J].Nanoscale Research Letters,2010,5(1):130-137.
BAILEY R E,NIE S M.Alloyed semiconductor quantum dots:tuning the optical properties without changing the particle size[J].Journal of the American Chemical Society,2003,125(23):7100-7106.

DABBOUSI B O,RODRIGUEZ-VIEJO J,MIKULEC F V,et al.(CdSe) ZnS core-shell quantum dots:Synthesis and characterization of a size series of highly luminescent nanocrystallites[J].Journal of Physcial Chemistry B,1997,101(46):9463-9475.