COMPOSITIONAL EFFECT ON THE OPTICAL ABSORPTION AND PHOTOLUMINESCENCE OF CdSxSe1-x QUANTUM DOTS EMBEDDED IN BOROSILICATE GLASSES

被引：5

作者：

Kumar, Jitender ^{[1
]}

Verma, A. ^{[1
]}

Pandey, P. K. ^{[1
]}

Bhatnagar, P. K. ^{[1
]}

Mathur, P. C. ^{[1
]}

Bhatnagar, M. ^{[2
]}

Liu, W. ^{[3
]}

Tang, S. H. ^{[3
]}

机构：

[1] Univ Delhi, Dept Elect Sci, South Campus,Benito Juarez Rd, New Delhi 21, India

[2] Delhi Univ, Hansraj Coll, Dept Elect, Delhi 110007, India

[3] Natl Univ Singapore, Dept Phys, Singapore 119243, Singapore

来源：

INTERNATIONAL JOURNAL OF NANOSCIENCE | 2009年 / 8卷 / 4-5期

关键词：

Quantum dots; composition; absorption; photoluminescence; red shift;

D O I：

10.1142/S0219581X09006250

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of composition on the optical absorption and photoluminescence (PL) spectra of the semiconductor quantum dots (QDs) of CdSxSe1-x embedded in borosilicate glass matrix has been studied. It is observed that the first exciton absorption peak shifts from 2.62 to 2.21 eV and the PL peak shifts from 2.16 to 1.87eV as the composition of selenium increases from 8 to 92wt%. Samples having higher concentration of sulfur are found to have higher PL peak intensity, which is interpreted to be due to high concentration of shallow traps in the sulfur-rich samples. Absorption coefficient goes on increasing as the selenium content increases. This may be attributed to the fact that selenium has higher atomic size as compared to that of sulfur.

引用

页码：403 / 408

页数：6

共 30 条

[21] Temperature dependence of the absorption spectra in CdTe-doped glasses [J].

Redígolo, ML ;

Arellano, WA ;

Barbosa, LC ;

Cruz, CHB ;

Cesar, CL ;

de Paula, AM .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1999, 14 (01) :58-63

[22] Nucleation and coalescence phenomena in the transformation of semiconductor-doped glasses [J].

Risbud, SH .

THERMOCHIMICA ACTA, 1996, 280 :319-332

[23] Trap elimination and reduction of size dispersion due to aging in CdSxSe1-x quantum dots [J].

Verma, Abhishek ;

Nagpal, Swati ;

Pandey, Praveen K. ;

Bhatnagar, P. K. ;

Mathur, P. C. .

JOURNAL OF NANOPARTICLE RESEARCH, 2007, 9 (06) :1125-1131

[24] GROWTH DYNAMICS OF II-VI COMPOUND SEMICONDUCTOR QUANTUM DOTS EMBEDDED IN BOROSILICATE GLASS MATRIX [J].

Verma, Abhishek ;

Pandey, P. K. ;

Kumar, J. ;

Nagpal, S. ;

Bhatnagar, P. K. ;

Mathur, P. C. .

INTERNATIONAL JOURNAL OF NANOSCIENCE, 2008, 7 (2-3) :151-160

[25]

Woggon U., 1996, OPTICAL PROPERTIES S

[26] OPTICAL STUDIES OF THE GROWTH OF CD1-XZNXS NANOCRYSTALS IN BOROSILICATE GLASS [J].

YUKSELICI, H ;

PERSANS, PD ;

HAYES, TM .

PHYSICAL REVIEW B, 1995, 52 (16) :11763-11772

[27] Solid-phase precipitation of CdTe nanoparticles in glass [J].

Yükselici, MH ;

Allahverdi, Ç .

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 2003, 236 (03) :694-701

[28] Two different mechanisms of formation of quantum dots in borosilicate glass [J].

Yükselici, MH .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (27) :6123-6131

[29] Alloyed ZnxCd1-xS nanocrystals with highly narrow luminescence spectral width [J].

Zhong, XH ;

Feng, YY ;

Knoll, W ;

Han, MY .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (44) :13559-13563

[30] Composition-tunable ZnxCd1-xSe nanocrystals with high luminescence and stability [J].

Zhong, XH ;

Han, MY ;

Dong, ZL ;

White, TJ ;

Knoll, W .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (28) :8589-8594

← 1 2 3 →