Details

Autor(en) / Beteiligte

• Song, Woo-Seuk
• Lee, Hye-Seung
• Lee, Ju Chul
• Jang, Dong Seon
• Choi, Yoonyoung
• Choi, Moongoo
• Yang, Heesun

Titel

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

Ist Teil von

• Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 2013-06, Vol.15 (6), p.1-10, Article 1750

Ort / Verlag

Dordrecht: Springer Netherlands

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.