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Near-unity NIR phosphorescent quantum yield from a room-temperature solvated metal nanocluster.
- Source :
-
Science . 1/19/2024, Vol. 383 Issue 6680, p326-330. 5p. 5 Color Photographs. - Publication Year :
- 2024
-
Abstract
- Metal nanoclusters have emerged as promising near-infrared (NIR)–emissive materials, but their room-temperature photoluminescence quantum yield (PLQY), especially in solution, is often low (<10%). We studied the photophysics of Au22(tBuPhC≡C)18 (Au22) and its alloy counterpart Au16Cu6(tBuPhC≡C)18 (Au16Cu6) (where tBu is tert-butyl and Ph is phenyl) and found that copper (Cu) doping suppressed the nonradiative decay (~60-fold less) and promoted intersystem crossing rate (~300-fold higher). The Au16Cu6 nanocluster exhibited >99% PLQY in deaerated solution at room temperature with an emission maximum at 720 nanometers tailing to 950 nanometers and 61% PLQY in the oxygen-saturated solution. The approach to achieve near-unity PLQY could enable the development of highly emissive metal cluster materials. [ABSTRACT FROM AUTHOR]
- Subjects :
- *METAL clusters
*COPPER
*METALS
*PHOTOLUMINESCENCE
Subjects
Details
- Language :
- English
- ISSN :
- 00368075
- Volume :
- 383
- Issue :
- 6680
- Database :
- Academic Search Index
- Journal :
- Science
- Publication Type :
- Academic Journal
- Accession number :
- 174866496
- Full Text :
- https://doi.org/10.1126/science.adk6628