Luminescent Anisotropic Wurtzite InP Nanocrystals
| Autor: | Yossef E. Panfil, Lior Asor, David Stone, Uri Banin, Somnath Koley, Tom Naor, Sergei Remennik |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Photoluminescence
Materials science Absorption spectroscopy Passivation Phosphines business.industry Mechanical Engineering Quantum yield Bioengineering General Chemistry Condensed Matter Physics Indium chemistry.chemical_compound chemistry Nanocrystal Indium phosphide Anisotropy Nanoparticles Optoelectronics General Materials Science business Luminescence Wurtzite crystal structure |
| Zdroj: | Nano Letters. 21:10032-10039 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.1c03719 |
| Popis: | Indium phosphide (InP) nanocrystals are emerging as an alternative to heavy metal containing nanocrystals for optoelectronic applications but lag behind in terms of synthetic control. Herein, luminescent wurtzite InP nanocrystals with narrow size distribution were synthesized via a cation exchange reaction from hexagonal Cu3P nanocrystals. A comprehensive surface treatment with NOBF4 was performed, which removes excess copper while generating stoichiometric In/P nanocrystals with fluoride surface passivation. The attained InP nanocrystals manifest a highly resolved absorption spectrum with a narrow emission line of 80 meV, and photoluminescence quantum yield of up to 40%. Optical anisotropy measurements on ensemble and single particle bases show the occurrence of polarized transitions directly mirroring the anisotropic wurtzite lattice, as also manifested from modeling of the quantum confined electronic levels. This shows a green synthesis path for achieving wurtzite InP nanocrystals with desired optoelectronic properties including color purity and light polarization with potential for diverse optoelectronic applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|