期刊
CHEMISTRY OF MATERIALS
卷 32, 期 12, 页码 5162-5172出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.0c01184
关键词
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资金
- Ministry of Science and Technology of China [2017YFA0204503]
- National Natural Science Foundation of China [21971189, 21503139, 21521062, 21790364, 21673144]
- Seed Foundation of Tianjin University
Achieving good control over all-organic core-shell configurations represents an enormous challenge due to the difficulties in pairing appropriate constituent materials and tuning their growth kinetics. Here, we first prepare a series of structure-and color-tunable organic binary charge-transfer (CT) microtubes, and then use a seed-mediated strategy to encapsulate a pre-existing CT crystal with another one into dual-emitting core-shell heterostructures. Specific intermolecular interactions and similar molecular packing motifs among diverse CT crystals enable tunable two-photon excited fluorescence (TPEF), comparable lattice distances and small structural mismatch, which can be used to direct the rational construction of such a configuration with integrated TPEF properties. By tracking the real-time growth processes, we infer that the core-shell configuration made of all-organic CT crystals was determined depending on surface-interface energy balance and desired lattice matching. Upon incorporation of a dopant into a shell, its emission color can thus be tailored, giving more color-tunable core-shell configurations. The present two-step epitaxial strategy provides a simple yet effective approach to access a library of core-shell heterostructures, which opens a door to construct functional organic heterostructures for optoelectronic devices.
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