Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 49, Pages 42740-42746Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b16294
Keywords
cocrystal; organic laser; excited-state process; halogen bonding; nanophotonics
Funding
- Ministry of Science and Technology of China [2017YFA0204502]
- National Natural Science Foundation of China [21533013, 21790364, 21603241]
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Organic cocrystals with unique energy-level structures are potentially a new class of materials for the development of versatile solid-state lasers. However, till now, the stimulated emission in cocrystal materials remains a big challenge possibly because of the nonradiative charge-transfer (CT) transitions. Here, for the first time, we report organic cocrystal microlasers constructed by simultaneously tailoring the energy levels and cavity structures based on the intermolecular halogen-bonding interactions. The intermolecular interactions triggered different self-assembly processes, resulting in distinct types of high-quality resonant micro cavities. More importantly, the halogen-bonding interactions alleviated intermolecular CT and thus brought about a favorable four -level energy structure for the population inversion and tunable lasing in the cocrystals.
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