A facile reduction of En~(3+) to Eu~(2+) in gadolinium monosulfide nanoparticles using a mixed solvent of oleic acid/hexadecylamine

摘要

We prepared GdS:Eu~(3+) by simple thermal decomposition under 1-dodecanethiol. A reduction process was observed from Eu~(3+) to Eu~(2+) when oleic acid and hexadecylamine were injected into GdS:Eu~(3+). Under UV excitation, GdS:Eu~(3+) showed an intense orange-red emission and GdS:Eu~(2+) showed a broad green band.