External quantum efficiency of single porous silicon nanoparticles

被引：77

作者：

Credo, GM ^{[1
]}

Mason, MD ^{[1
]}

Buratto, SK ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem, Santa Barbara, CA 93106 USA

来源：

APPLIED PHYSICS LETTERS | 1999年 / 74卷 / 14期

关键词：

D O I：

10.1063/1.123719

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We use a combination of single nanoparticle luminescence and scanning force microscopy to determine the quantum efficiency (QE) of single porous Si nanoparticles and to determine the ratio of luminescent nanoparticles deposited on a silica surface to the total nanoparticles. An estimate of the QE of bulk porous Si based on these data compares favorably to the QE measured experimentally. From this we conclude that the 1% QE of bulk porous Si measured experimentally results primarily from a statistical distribution of high QE quantum-confined Si chromophores. (C) 1999 American Institute of Physics. [S0003-6951(99)03314-8].

引用

页码：1978 / 1980

页数：3

共 15 条

[1] COMBINED SHEAR FORCE AND NEAR-FIELD SCANNING OPTICAL MICROSCOPY [J].

BETZIG, E ;

FINN, PL ;

WEINER, JS .

APPLIED PHYSICS LETTERS, 1992, 60 (20) :2484-2486

[2] LUMINESCENCE OF SILICON MATERIALS - CHAINS, SHEETS, NANOCRYSTALS, NANOWIRES, MICROCRYSTALS, AND POROUS SILICON [J].

BRUS, L .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (14) :3575-3581

[3] SILICON QUANTUM WIRE ARRAY FABRICATION BY ELECTROCHEMICAL AND CHEMICAL DISSOLUTION OF WAFERS [J].

CANHAM, LT .

APPLIED PHYSICS LETTERS, 1990, 57 (10) :1046-1048

[4] Porous silicon: From luminescence to LEDs [J].

Collins, RT ;

Fauchet, PM ;

Tischler, MA .

PHYSICS TODAY, 1997, 50 (01) :24-31

[5] The structural and luminescence properties of porous silicon [J].

Cullis, AG ;

Canham, LT ;

Calcott, PDJ .

JOURNAL OF APPLIED PHYSICS, 1997, 82 (03) :909-965

[6] PHOTON SPECTROSCOPY, MAPPING, AND TOPOGRAPHY OF 85-PERCENT POROUS SILICON [J].

DUMAKS, P ;

GU, M ;

SYRYKH, C ;

HALLIMAOUI, A ;

SALVAN, F ;

GIMZEWSKI, JK ;

SCHLITTLER, RR .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1994, 12 (03) :2064-2066

[7] Nonlinear optical effects in porous silicon: Photoluminescence saturation and optically induced polarization anisotropy [J].

Efros, AL ;

Rosen, M ;

Averboukh, B ;

Kovalev, D ;

BenChorin, M ;

Koch, F .

PHYSICAL REVIEW B, 1997, 56 (07) :3875-3884

[8] LUMINESCENT COLLOIDAL SILICON SUSPENSIONS FROM POROUS SILICON [J].

HEINRICH, JL ;

CURTIS, CL ;

CREDO, GM ;

KAVANAGH, KL ;

SAILOR, MJ .

SCIENCE, 1992, 255 (5040) :66-68

[9]

LEHMAN V, 1991, APPL PHYS LETT, V58, P865

[10] Luminescence of individual porous Si chromophores [J].

Mason, MD ;

Credo, GM ;

Weston, KD ;

Buratto, SK .

PHYSICAL REVIEW LETTERS, 1998, 80 (24) :5405-5408

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