Amine-derived synthetic approach to color-tunable InP/ZnS quantum dots with high fluorescent qualities

High-quality, Cd-free InP quantum dots (QDs) have been conventionally synthesized by exclusively selecting tris(trimethylsilyl)phosphine (P(TMS) 3 ) as a phosphorus (P) precursor, which is problematic from the standpoint of green and economic chemistry. Thus, other synthetic chemistries adopting alt...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2013-06, Vol.15 (6), p.1-10, Article 1750
Main Authors: Song, Woo-Seuk, Lee, Hye-Seung, Lee, Ju Chul, Jang, Dong Seon, Choi, Yoonyoung, Choi, Moongoo, Yang, Heesun
Format: Article
Language:English
Subjects:
Applied sciences
Cadmium
Characterization and Evaluation of Materials
Chemistry and Materials Science
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Economics
Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronics
Exact sciences and technology
Indium phosphides
Inorganic Chemistry
Lasers
Materials Science
Molecular electronics, nanoelectronics
Nanocrystalline materials
Nanoparticles
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Nanotechnology
Nucleation
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Quantum dots
Rendering
Research Paper
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Zinc sulfides
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Summary:High-quality, Cd-free InP quantum dots (QDs) have been conventionally synthesized by exclusively selecting tris(trimethylsilyl)phosphine (P(TMS) 3 ) as a phosphorus (P) precursor, which is problematic from the standpoint of green and economic chemistry. Thus, other synthetic chemistries adopting alternative P sources to P(TMS) 3 have been introduced, however, they could not guarantee the production of satisfactorily fluorescence-efficient, color-pure InP QDs. In this study, the unprecedented controlled synthesis of a series of band-gap-tuned InP QDs is demonstrated through a hot-injection of a far safer and cheaper tris(dimethylamino)phosphine in the presence of a key coordinating solvent of oleylamine that enables successful QD nucleation/growth. Effects of the co-existence of Zn additive, the core growth temperature, and the amount of P source injected on the growth behaviors of InP QD are investigated. After ZnS overcoating by a successive injection of 1-dodecanethiol only, high-fluorescence-quality, green-to-red color emission-tunable core/shell QDs of InP/ZnS are obtained. The fluorescent characteristics of different color-emitting QDs desirably exhibit little fluctuations in quantum yield and emission bandwidth, specifically ranging 51–53 % and 60–64 nm, respectively. Lastly, the utility of the introduction of a secondary shelling process in rendering the QDs are more bright, photostable is also proved.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-013-1750-y