CdS quantum dots in hybrid sol-gel matrix; absorption and room-temperature photoluminescence

被引：8

作者：

Kang, K ^{[1
]}

Daneshvar, K

机构：

[1] Univ N Carolina, Dept Elect & Comp Engn, Charlotte, NC 28223 USA

[2] Univ N Carolina, Ctr Optoelect & Opt Commun, Charlotte, NC 28223 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2004年 / 95卷 / 02期

关键词：

D O I：

10.1063/1.1633651

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Strong room-temperature luminescence spectra for cadmium sulfide (CdS) nanometer quantum dots (NQDs) were obtained using a xenon lamp. The samples were fabricated of various concentrations of semiconductor NQDs in the hybrid sol-gel matrix. Concentration dependent total absorption showed a linear relationship following the Beer-Lambert law. An excess H2S source reduced the luminescence intensity, shifted the spectra peak to the red, and broadened the spectra. These excess H2S phenomena disappeared after a certain period of time in ambient conditions. The result showed that strong luminescence in CdS in hybrid-sol-gel matrix can be achieved without any casing. (C) 2004 American Institute of Physics.

引用

页码：646 / 648

页数：3

共 12 条

[1] CdS photoluminescence inhibition by a photonic structure [J].

Blanco, A ;

Lopez, C ;

Mayoral, R ;

Miguez, H ;

Meseguer, F ;

Mifsud, A ;

Herrero, J .

APPLIED PHYSICS LETTERS, 1998, 73 (13) :1781-1783

[2] Room temperature optical gain in sol-gel derived CdS quantum dots [J].

Butty, J ;

Peyghambarian, N ;

Kao, YH ;

Mackenzie, JD .

APPLIED PHYSICS LETTERS, 1996, 69 (21) :3224-3226

[3] QUASI-CONTINUOUS GAIN IN SOL-GEL DERIVED CDS QUANTUM DOTS [J].

BUTTY, J ;

HU, YZ ;

PEYGHAMBARIAN, N ;

KAO, YH ;

MACKENZIE, JD .

APPLIED PHYSICS LETTERS, 1995, 67 (18) :2672-2674

[4] Sol-gel waveguide fabrication parameters: an experimental investigation [J].

Du, XM ;

Touam, T ;

Degachi, L ;

Guilbault, JL ;

Andrews, MP ;

Najafi, SI .

OPTICAL ENGINEERING, 1998, 37 (04) :1101-1104

[5] Electroluminescence from heterojunctions of nanocrystalline CdS and ZnS with porous silicon [J].

Gokarna, A ;

Pavaskar, NR ;

Sathaye, SD ;

Ganesan, V ;

Bhoraskar, SV .

JOURNAL OF APPLIED PHYSICS, 2002, 92 (04) :2118-2124

[6] ROOM-TEMPERATURE SPECTRAL HOLE-BURNING AND ELIMINATION OF PHOTODARKENING IN SOL-GEL DERIVED CDS QUANTUM DOTS [J].

KANG, K ;

KEPNER, AD ;

HU, YZ ;

KOCH, SW ;

PEYGHAMBARIAN, N ;

LI, CY ;

TAKADA, T ;

KAO, Y ;

MACKENZIE, JD .

APPLIED PHYSICS LETTERS, 1994, 64 (12) :1487-1489

[7] Q-CdS photoluminescence activation on Zn2+ and Cd2+ salt introduction [J].

Moore, DE ;

Patel, K .

LANGMUIR, 2001, 17 (08) :2541-2544

[8] Direct printing of gratings on sol-gel layers [J].

Moreau, Y ;

Arguel, P ;

Coudray, P ;

Etienne, P ;

Porque, J ;

Signoret, P .

OPTICAL ENGINEERING, 1998, 37 (04) :1130-1135

[9] Sol-gel glass waveguide and grating on silicon [J].

Najafi, SI ;

Touam, T ;

Sara, R ;

Andrews, MP ;

Fardad, MA .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 1998, 16 (09) :1640-1646

[10] Propagation in sol-gel channel waveguides: numerical and experimental approaches [J].

Porque, J ;

Coudray, P ;

Moreau, Y ;

Etienne, P .

OPTICAL ENGINEERING, 1998, 37 (04) :1105-1110

← 1 2 →