Jump to main content
Jump to site search


Breaking the strong 1D growth habit to yield quasi-equiaxed REPO4 nanocrystals (RE=La-Dy) via solvothermal reaction and investigation of photoluminescence

Abstract

Quasi-equiaxed REPO4 (RE=La-Dy) nanocrystals of either the monoclinic (m-) or hexagonal (h-) structure, depending on the type of RE3+, have been succesfully synthesized through solvothermal reaction in the presence of ethylene glycol (EG). Detailed characterizations of the products were achieved by the combined techniques of XRD, FE-SEM, TEM, FTIR, TG/DTA, PLE/PL, and fluorescence decay. The intrinsically strong 1D growth of the phosphates was gradually suppressed through increasing solution pH and EG dosage, and the formation mechanism was elucidated with h-GdPO4 as representative. The differences in crystal structure, IR response and crystal size of the as-synthesized REPO4 crystals were interpreted in detail. It was shown that the phase purity and crystal morphology of h-GdPO4 can be well retained up to 700 oC, followed by a complete transition from hexagonal to monoclinic phase at 900 oC. The photoluminescent properties of Dy3+-doped h-GdPO4 nanocrystals, including excitation, emission and fluorescence decay, were thoroughly investigated, and almost pure white-light luminescence was attained with the similarly strong yellow (573 nm, 4F9/2→6H13/2) and blue (478 nm, 4F9/2→6H15/2) emissions of Dy3+ under excitation of the host Gd3+ ions at ~274 nm.

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 Oct 2017, accepted on 03 Jan 2018 and first published on 03 Jan 2018


Article type: Paper
DOI: 10.1039/C7CE01880K
Citation: CrystEngComm, 2018, Accepted Manuscript
  •   Request permissions

    Breaking the strong 1D growth habit to yield quasi-equiaxed REPO4 nanocrystals (RE=La-Dy) via solvothermal reaction and investigation of photoluminescence

    Z. Wang, X. Shi, X. Wang, Q. Zhu, B. Kim, X. Sun and J. Li, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C7CE01880K

Search articles by author

Spotlight

Advertisements