ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis of highly luminescent nanocomposite LaF₃:Ln³⁺/Q-dots-CdTe system, exhibiting tunable red-to-green emission

Lenka Řezáčová, Marcin Runowski, Přemysl Lubal, Andrzej Szyczewski, and Stefan Lis

Masaryk University, Brno, Czech Republic

E-mail: lubal@chemi.muni.cz

Abstract: Preparation of LaF₃:Gd³⁺ 30%, Ce³⁺ 10%, Eu³⁺ 1% NPs conjugated with CdTe quantum dots was performed by two methods. The first method includes mixing of two products, while the second method is based on the co-precipitation approach. The mixing of individual components did not lead to the formation of a new product. On the contrary, the product obtained by co-precipitation synthesis resulted in particles having about 140 nm in diameter. This nanocomposite system exhibits tunable red (λ_exc = 248 nm) and green (λ_exc = 340 m) luminescence due to the presence of Eu³⁺ ion and CdTe quantum dots.

Keywords: Luminescence ; CdTe quantum dots ; Lanthanide-doped fluorides ; Energy transfer ; Nanocomposites 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00816-8

Chemical Papers 73 (12) 2907–2911 (2019)