Indium-antimony-halide single crystals for high-efficiency white-light emission and anti-counterfeiting.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 34417176.
- Also identified by DOI 10.1126/sciadv.abg3989 and PMC identifier 8378825.
- Licence recorded as CC BY-NC.
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Abstract
Although single-source white emissive perovskite has emerged as a class of encouraging light-emitting material, the synthesis of lead-free halide perovskite materials with high luminous efficiency is still challenging. Here, we report a series of zero-dimensional indium-antimony (In/Sb) alloyed halide single crystals, BAPPIn<sub>2-2<i>x</i></sub> Sb<sub>2<i>x</i></sub> Cl<sub>10</sub> (BAPP = C<sub>10</sub>H<sub>28</sub>N<sub>4</sub>, <i>x</i> = 0 to 1), with tunable emission. In BAPPIn<sub>1.996</sub>Sb<sub>0.004</sub>Cl<sub>10</sub>, bright yellow emission with near 100% photoluminescence quantum yield (PLQY) is yielded when it was excited at 320 nm, which turns into bright white-light emission with a PLQY of 44.0% when excited at 365 nm. Combined spectroscopy and theoretical studies reveal that the BAPP<sup>4+</sup>-associated blue emission and inorganic polyhedron-afforded orange emission function as a perfect pair of complementary colors affording white light in BAPPIn<sub>1.996</sub>Sb<sub>0.004</sub>Cl<sub>10</sub> Moreover, the interesting afterglow behavior, together with excitation-dependent emission property, makes BAPPIn<sub>2-2<i>x</i></sub> Sb<sub>2<i>x</i></sub> Cl<sub>10</sub> as high-performance anti-counterfeiting/information storage materials.