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In this work, we report the hot-injection synthesis of Cs3ZnCl5 colloidal nanocrystals (NCs) with tunable amounts of Cu+ and Mn2+ substituent cations. All the samples had a rodlike morphology, with a diameter of ∼14 nm and a length of ∼30–100 nm. Alloying did not alter the crystal structure of the host Cs3ZnCl5 NCs, and Cu ions were mainly introduced in the oxidation state +1 according to X-ray photoelectron and electron paramagnetic resonance spectroscopies. The spectroscopic analysis of unalloyed, Cu-alloyed, Mn-alloyed, and Cu, Mn coalloyed NCs indicated that (i) the Cs3ZnCl5 NCs have a large band gap of ∼5.35 eV; (ii) Cu(I) aliovalent alloying leads to an absorption shoulder/peak at ∼4.8 eV and cyan photoluminescence (PL) peaked at 2.50 eV; (iii) Mn(II) isovalent alloying leads to weak Mn PL, which intensifies remarkably in the coalloyed samples, prompted by an energy transfer (ET) process …
American Chemical Society
Publication date: 
20 Sep 2022

Ying Liu, Matteo L Zaffalon, Juliette Zito, Francesca Cova, Fabrizio Moro, Marco Fanciulli, Dongxu Zhu, Stefano Toso, Zhiguo Xia, Ivan Infante, Luca De Trizio, Sergio Brovelli, Liberato Manna

Biblio References: 
Volume: 34 Issue: 19 Pages: 8603-8612
Chemistry of Materials