Facile synthesis of uniform large-sized InP nanocrystal quantum dots using tris(tert-butyldimethylsilyl)phosphine

Somyoung Joung, Sungwoo Yoon, Chang-Soo Han, Youngjo Kim, Sohee Jeong

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Colloidal III-V semiconductor nanocrystal quantum dots [NQDs] have attracted interest because they have reduced toxicity compared with II-VI compounds. However, the study and application of III-V semiconductor nanocrystals are limited by difficulties in their synthesis. In particular, it is difficult to control nucleation because the molecular bonds in III-V semiconductors are highly covalent. A synthetic approach of InP NQDs was presented using newly synthesized organometallic phosphorus [P] precursors with different functional moieties while preserving the P-Si bond. Introducing bulky side chains in our study improved the stability while facilitating InP formation with strong confinement at a readily low temperature regime (210°C to 300°C). Further shell coating with ZnS resulted in highly luminescent core-shell materials. The design and synthesis of P precursors for high-quality InP NQDs were conducted for the first time, and we were able to control the nucleation by varying the reactivity of P precursors, therefore achieving uniform large-sized InP NQDs. This opens the way for the large-scale production of high-quality Cd-free nanocrystal quantum dots.

Original languageEnglish
Article number93
JournalNanoscale Research Letters
Volume7
DOIs
Publication statusPublished - 2012 Mar 8

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Keywords

  • Colloidal synthesis
  • Indium phosphide nanocrystal quantum dot
  • Nontoxic
  • Phosphorus precursor

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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