Journal
ACS ENERGY LETTERS
Volume 4, Issue 7, Pages 1579-1583Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.9b00991
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Funding
- National Science Foundation [DMR-1644779, DMR-1709116, CHE-1664661]
- Air Force Office of Scientific Research (AFOSR) [17RT0906]
- State of Florida
- U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division
- NSF [CHE-1464955, DMR-1606952]
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Organic metal halide hybrids with zero-dimensional (OD) structure at the molecular level, or single-crystalline bulk assemblies of metal halides, are an emerging class of light-emitting materials with high photoluminescence quantum efficiencies (PLQEs) and color tunability. Here we report the synthesis and characterization of a new single-crystalline bulk assembly of metal halide clusters, (bmpy)(9)[ZnCl4](2)[Pb3Cl11] (bmpy: 1-butyl-1-methylpyrrolidinium), which exhibits green emission peaked at 512 nm with a remarkable near-unity PLQE at room temperature. Detailed structural and photophysical studies suggest that there are two emitting states in [Pb3Cl11](5-) clusters, whose populations are strongly dependent on the surrounding molecular environment that controls the excited state structural distortion of [Pb3Cl11](5-) clusters. High chemical- and photostability have also been demonstrated in this new material.
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