Abstract
This report presents a systematic study on the effect of zinc (Zn) carboxylate precursor on the structural and optical properties of red light emitting InP nanocrystals (NCs). NC cores were assessed using X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), energy-dispersive X-ray spectroscopy (EDX), and high-resolution transmission electron microscopy (HRTEM). When moderate Zn:In ratios in the reaction pot were used, the incorporation of Zn in InP was insufficient to change the crystal structure or band gap of the NCs, but photoluminescence quantum yield (PLQY) increased dramatically compared with pure InP NCs. Zn was found to incorporate mostly in the phosphate layer on the NCs. PL, PLQY, and time-resolved PL (TRPL) show that Zn carboxylates added to the precursors during NC cores facilitate the synthesis of high-quality InP NCs by suppressing nonradiative and sub-band-gap recombination, and the effect is visible also after a ZnS shell is grown on the cores.
| Original language | English |
|---|---|
| Pages (from-to) | 8381-8386 |
| Number of pages | 6 |
| Journal | Inorganic Chemistry |
| Volume | 55 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - Sept 6 2016 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 American Chemical Society.
ASJC Scopus Subject Areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry