1 research outputs found
Cation-Induced Strategy toward an Hourglass-Shaped Cu<sub>6</sub>I<sub>7</sub><sup>–</sup> Cluster and Its Color-Tunable Luminescence
We
have designed and synthesized a series of two-dimensional materials
featuring with a (3,6)-connected <b>kgd</b> layer, in which
an unprecedented anionic Cu<sub>6</sub>I<sub>7</sub><sup>–</sup> cluster was first trapped through a cation-induced synthetic strategy.
The emission colors of these cluster-based luminophores gradually
shift from blue to yellow as the monovalent cations (Li<sup>+</sup>, Na<sup>+</sup>, NH<sub>4</sub><sup>+</sup>, K<sup>+</sup>, TEA<sup>+</sup>) located between the neighboring layers changed. SCXRD analyses
discover that the variation of the emission may be attributed to the
transformation of the hourglass-shaped Cu<sub>6</sub>I<sub>7</sub><sup>–</sup> cluster. The bright, tunable, and broad luminescent
emissions make them promising candidates as phosphors for light-emitting
diodes (LEDs). Particularly, compound <b>1-TEA</b> emitting
intensive yellow light with high luminescence quantum efficiency (QY
= 79.9%) shows extremely high thermal, pH, organic solvent, and mechanical
photostabilities. By employing it as a yellow phosphor, we fabricate
a series of white lighting materials with high color rendering index
(CRI)